In the storage manager I see the values "Reported 6. Is there any documented "clean" way of setting up. Launch the EaseUS Data Recovery Wizard, choose a NAS server, and begin the recovery process. The snapshot feature on DSM is specially designed, so replicating snapshots to other Linux-based devices isn't available either. Or you can use apt-btrfs-snapshot delete instead. You will run into no space left on device errors while writing a lot of data sooner or later. ; If you only have one NAS, you can use Hyper Backup to back up data to the cloud or other storage media. . Added the snapshot calculator to provide a graphical. Snapshots are time-based : they take a complete image of the files at the time. Hyper Backup supports both the EXT4 and the Btrfs file system, but the format of the backup data is not readable. Your data in safe hands with Btrfs 1. If you have a snapshot of a volume where the files are encrypted, solve the ransomware attack and activate the snapshot before the ransomware occurred. Btrfs supports advanced storage technologies that meet the needs of modern business: • Advanced snapshot technology provides schedulable and near-instantaneous data protection of shared. 25. On a quarterly basis we rotate an. I hope this will avoid others the headhaches I suffered!Synology Knowledge Center offers comprehensive support, providing answers to frequently asked questions, troubleshooting steps, software tutorials, and all the technical documentation you may need. corruption through file self-healing and allows for the reversal of unintentional or malicious changes through fast snapshot technology. the VMS is an extra added bonus, if have add RAM to support a few VM's. S. Last I'm backing up Synology 1 to external HDD, rotated weekly and I keep the external in my bag so it's nominally off site. Removed volume. You can see the number of snapshots taken within the selected time frame. To use snapshots on your Synology, you must have a copy that supports the BTRFS file system. High-frequency protection with snapshots. Unfortunately, while the main mount /volume1 is btrfs, and docker supports btrfs as a storage driver, it. FS6400, FS3600, FS3410, FS3400, FS3017, FS2500, FS2017, FS1018. Snapshot Replication (available on Synology NAS models that support Btrfs) includes options to take snapshots on demand or configure schedules and retention policies. While full data backups are better for data protection, snapshots allow for a layer of data protection while. It took a long time to write the data but it was pretty easy overall. You can set it up with an intelligent retention policy, or just 2 weeks. Shared folders located in volumes using the Btrfs file system; LUNs created as Standard LUNs with storage acceleration or Advanced LUNs; Snapshot Replication has defined the limits of the following maximum numbers of retainable snapshots: 1024 snapshots for each shared folder (or 256 on certain Synology NAS models) 256 snapshots for each LUN sudo btrfs filesystem defrag -yvr /volume1. A place to answer all your Synology questions. Btrfs is a copy-on-write (CoW) filesystem for Linux aimed at implementing advanced features while focusing on fault tolerance, self-healing properties, and easy administration. btrfs sub list . If you plan to use all the capacity of the volume stick to ext4. This is a tutorial on how to set up Synology Snapshots to ensure that your data is never lost, even if your files change! This allows you to revert back to p. See moreBTRFS Snapshots are a feature that every single Synology user should be using. On startup of the server it tries as BTRFS test snapshot, which failes (inapropriate iotcl for device). You can browse and restore snapshots using Snapshot Replication, File Station, Windows File Explorer, or other file protocols. The following table lists the Synology NAS models that support data deduplication. Snapshots. Simply select one and click Browse. Both Btrfs and ZFS offer built-in RAID support, but their implementations differ. Follow instructions to set up as BTRFS. If, for example, most your data writes are file add (like storing your camera roll, your movie collection,etc), btrfs snapshots will use virtually no extra space. Keep your data on-site. Enable SSH service on the NAS server. Ok after 4 days of trying to figure this out I think I finally got it! I ran the command: btrfs filesystem reclaim-space -S /volume1 -r It took a little while to run, and afterwards nothing looked different. Ext4 for Synology NAS devices, most users should pick Btrfs for the data integrity benefits that it provides. Data integrity protection. Snapshot Replication (available on Synology NAS models that support Btrfs) includes options to take snapshots on demand or configure schedules and retention policies. I think I have a game plan but wanted to check with you guys to verify my steps. RAID scrubbing: This function can repair any detected data inconsistencies on storage pools that. The thing is I don't fully understand what the advantages are of the 3rd scenario compared to the 2nd scenario. The Ext4 filesystem does not support creating snapshots of the filesystem. I set AB to keep snapshots, default setting on DSM6 (3-1-7-4-12-3). The BTRFs filesystem is supported by Synology on all of their NAS devices. Subvolumes. pnutjam • 9 mo. Block sub-allocation and Tail packing. Click Delete to confirm the removal. What takes up space is each consecutive data change, that is why snapshots are created instantaneously. Make a new Storage Pool on the one drive. That are many copies of the past years (even an ‘antique’ DS412. S. Background noise: 16. 03. Set your space reclamation schedule: Click Pause space reclamation. We begun testing BTRFS based "Snapshot and Replication" application rather than our own way of doing things. 2 SSD adapter card4 • Advanced Btrfs file system offering 65,000 system-wide snapshots and 1,024 snapshots per shared folder • Synology High Availability (SHA) providing continuousSynology also uses the btrfs snapshots. snapper rollback # will swap to that snapshot, snapper undochange #. Two G. Backed up data to USB drives. Ask a question or start a discussion now. Data deduplication can only run when the volume status is Healthy. You will see a confirmation message. Aug 29, 2017 Is this a BTRFS file system? If so, snapshots don't take up space in the same way as an ext4 volume. Find it under Download Center > your model > Documents > Product Specifications . Rationally, you must decide if you want. Freeing up volume space by deleting snapshots. You can browse and restore snapshots using Snapshot Replication, File Station, Windows File Explorer, or other file protocols. waiting for the next scheduled replication to take a new snapshot. 8. Storage Manager Btrfs File System Last updated: Sep 26, 2023 Purpose This article explains how to create a large volume up to 1 PB in size. Select the ext4 volume you want to remove. According to your environment and needs, you can choose to replicate shared folders to another Synology NAS or another Btrfs volume on the local Synology NAS. If you control the filesystem layer (i. So no more freezing, but now timeshift isn’t showing a size for any of my new snapshots. Snapshot Replication (available on Synology NAS models that support Btrfs) includes options to take snapshots on demand or configure schedules and retention policies. Maybe this is not possible because NFS is involved. Snapshot Replication (available on Synology NAS models that support Btrfs) includes options to take snapshots on demand or configure schedules and retention policies. The shared folder must be located on a Btrfs volume. Infact, its not the amount of time, it was the degradation to performance that made the server almost unusable while it cleaned up. 1) Synology please add a way to schedule a volume defrag on the web interface. Snapshot Replication leverages the modern Btrfs file system to create point-in-time copies of shared folders and LUNs that can be replicated to other Synology NAS and rapidly restored in case of data loss or accidental modifications to the original data. Learn more. Snapshots also let users recover their own deleted or modified files in shared folders on their own. You can browse and restore snapshots using Snapshot Replication, File Station, Windows File Explorer, or other file protocols. As far as i know with EXT4 you can't backup PC (I never tried with a physical server). Nov 09, 2017. Main features: Data protection features, including snapshot, replication, and point-in-time recovery. So to make it more interesting, Synology uses mdraid for raid, then on top of it uses lvm ("pools" you see in the UI), and then on top of lvm it uses either ext4fs or btrfs ("volumes" in UI). Click Calculate Now to start calculating. Your data in safe hands with Btrfs 1. There are options for adjusting thresholds, but I just went with the default command. 993×870 102 KB. To check the space consumption of snapshots: 1. The table below shows the Synology NAS models supporting the Btrfs file system: Series. Other then that. ; Click Create and launch the Create Replication Task wizard. FS6400, FS3600, FS3410, FS3400, FS3017, FS2500, FS2017, FS1018. The following table lists the Synology NAS models that support WriteOnce and immutable snapshots. j. 0. Main features: Data protection features, including snapshot, replication, and point-in-time recovery. This is a big deal. Learn more. , and Docker has been running for a while so I checked the status of the BTRFS volume. A replication task for a LUN can be executed every 15 minutes. 8. ago. Synology iSCSI storage fully. btrfs sub del @sharesnap/* btrfs sub del @sharesnap/ btrfs sub del @img_bkp_cache/ After that I can now mount it on the latest kernels without the errors. You can see the number of snapshots taken within. For DSM 7. . You have the /@ subvolume mounted in /, so there is no such file with that name. You can create one-to-many/extended replications for a shared folder to at most 3 different destinations. 03. User quotas for each shared folder. While RAID 5 and 6 can be compared to RAID Z. A. You can correlate two lists together to get sizes of each subvolume/snapshot. File system scrubbing: This function checks the volumes in the Btrfs file system. , ASCII. The easiest way to fix this is to make your handling of the subvolume containing "/var/lib/docker/btrfs" explicit, just like you do with "@home". Snapshots are readonly unless they are mounted as a share folder -#snapshots visibility I usually recommend turning it off unless you need it when browsing the snapshots via dsm file station (antivirus software won't understand that #snapshots isn't a folder and can end up scanning every single snapshot that will have mostly identical data), on windows pc. Entire shared folders can be easily and quickly copied as BTRFs are copy-on-write. Environment. . With btrfs snapshots, assuming I'd taken a recent snapshot, restoring that much data would have been a matter of seconds. We destroyed the volume on uk2 to recreate it in BTRFS instead of EXT4. So any operation starting a new transaction will block until the rescan and the transaction completes. In Btrfs, a snapshot is a copy of an entire subvolume taken at a given point in time. snapshots can be replicated to other synology nas. It works on my Windows, Linux VM, and iPhone. Find it under Download Center > your model > Documents > Product Specifications . DSM 7 Series. Any snapshot protection only gets you so far in case things go really bad (but with the raid setup to protect against disk failures and btrfs snapshots that might be very helpfull to protect nicely against a ransomware attack, that is still a good start). FS-series. Veeam Backup to Synology NAS takes forever. Check the following information to download the installer with the compatible file type from Download Center or Active Backup for Business > Physical Server > Linux > Add Device on your target device. Added new btrfs volume. I am running a Synology NAS (BTRFS, NAS type: RS2416+) I have a shared folder I wanted to migrate to another appliance, and I would like to move all snapshots that have been running (some to a year back) via Synology's Snapshot and Replication app. This NAS will be to host audio files, video files and it might be also used as a working share for Protools (Digital Audio Workstation) meaning we will be doing audio recording to. Unfortunately I don't know how or where to enable the snapshot timeline as shown in the Synology DS18016+ specifications From the screen capture on the DS18016+ specs page it is not a 100% clear whether the Data Protection Manager is a separate downloadable package or an integrated package in the DSM . - you cannot use the BTRFS snapshot folder (a cool feature of Synology BTRFS options) while the encrypted share is mounted; thus you cannot easily browse files of prior snapshots, and therefore much of the convenience of snapshots is reduced, forcing you to unmount an encrypted share before accessing any snapshotsSnapshot Replication (available on Synology NAS models that support Btrfs) includes options to take snapshots on demand or configure schedules and retention policies. A very important piece that all NAS owners should be using! 🔔 Subscribe for. e. Verify the user with getent passwd student2, and it will appear normal. Only virtual machines created on Btrfs volumes support the snapshot feature. Maximum number of snapshots per system: Memory exceeding or equivalent to 2 GB (factory-installed): 65,536. . The price-performance ratio in this storage dimension is perfect. ago. This is system-generated metadata for the snapshots present in the system. 15-08. Thanks! Comment. Apparently some adjustments still need to be made so that using the btrfs storage driver also works on the Btrfs filesystem on a Synology NAS. Launch Storage Manager. In rare cases you might want to delete files from snapshots. Main features: Data protection features, including snapshot, replication, and point-in-time recovery. Select a shared folder and click Snapshot > Calculate Size. Click Remove. Sorting is probably enough to guarantee that snapshots or subvolumes which depend on previous ones are handled first. The price-performance ratio in this storage dimension is perfect. Depending on the functions supported by your Synology NAS, Snapshot Replication helps you accomplish the following tasks: Take and manage snapshots of shared folders and LUNs. Btrfs is a modern file system designed to safeguard data integrity through metadata mirroring, file self-healing, and fast snapshot replication. However these changes are very minimal. Recommended for general use. And even then, think twice. Next step is replication. 1: Select Btrfs (Peta Volume) and click Next. 1: Vyberte možnost Btrfs. Select a time range no shorter than a week by specifying the start and end date. Synology Backup SuiteThis bug appears with a btrfs volume (with trash bin activated or not) using snapshots with snapshot replication software. Learn more Btrfs is a copy on write file system. The original data is read from the layer where the file currently exists, and only the modified blocks are written. Select a shared folder you wish to remove the snapshots of. 1 They are the perfect cost-effective file management and sharing solution for SMBs and come equipped with advanced backup capabilities designed for businesses with expanding. For each shared folder, edit its settings and change the volume from the ext4 volume to the new btrfs volume. A continuación, os vamos a explicar brevemente las principales características de EXT4 y de Btrfs. FS6400, FS3600, FS3410, FS3400, FS3017, FS2500, FS2017, FS1018. Depending on where you are, you will have either Recover button (via Recovery section), or Snapshot > Snapshot List menu (via Snapshot section). Snapshot Replication (available on Synology NAS models that support Btrfs) includes options to take snapshots on demand or configure schedules and retention policies. tmp; cp -a foo foo. For. Data deduplication is only supported on Synology SSDs and specific Synology NAS models ; The Btrfs file system is available on specific Synology NAS models only ; A storage pool must be comprised of drives of the same type. 1. Your filesystem is still using 1TB of storage, rather than 900GB, as your snapshot is still holding onto the 100GB of. /install. My DS716+ has a hard limit of 1024 snapshots per shared folder. Go to the Volume page. I myself am using synology since 2016. (Deleting automatic snapshots on low free space might be reasonable in some use cases. AdamV158. On Synology its per share folder so not sure if that is any different (Synology has a 256 snapshot limit per share folder). If data are already corrupted, you might not be able to restore the data via an onsite backup solution (e. Unless you're in the directory where the snapshot resides, then you can just specify the snapshot name. Freeing up volume space by deleting snapshots. The advanced Btrfs file system helps safeguard data against corruption through file self-healing and allows for the reversal of unintentional or malicious changes through fast snapshot technology. 204. The equivalent of a rollback with undochange is to undochange everything from a snapshot to the current snapshot. It is possible to set DSM to retain x number of daily snapshots, y number of weekly, z monthly etc. BTRFS is the single best feature of a Synology! This video goes over the top 5 features. Snapshots on the Btrfs File System. e. Hyper Backup supports both the EXT4 and the Btrfs file system, but the format of the backup data is not readable. Btrfs: advanced file system for data protection. several hours after HyperBackup session was ended , sudo btrfs sub list -td /volume1 showed 126 snapshots in 'deleted' state (almost no extra disk space was used). Moreover the “guestmount is missing”. I've modified my synology DS918 (DSM 6. You can browse and restore snapshots using Snapshot Replication, File Station, Windows File Explorer, or other file protocols. For we works great for File Server (SMB mostly). People bash btrfs, but Synology has been using it as their main filesystem in their low. If the replication source fails, shared folders or LUNs on the replication destination can be read and written to continue to. Nice video and a much-deserved push for BTRFS. การทำ Snapshot Replication บน Synology เพื่อป้องกัน Ransomware. 2. This will defrag using -v for verbose, -r for recursive inclusion of all subfolders, and -y "do syno reclaim space". Without earlier snapshots, blocks might only be deleted after compression, but if snapshots hold blocks they will be preserved and their compressed data will be stored ADDITIONALLY. Finally found the solution: under "Storage Manager" > "Global Settings" the "Space Reclamation Schedule" was set to a small time window (outside my current day/time). Click Delete to confirm the removal. Models. 1. Starting Syno Data Protection - Btrfs Snapshot Count Sync. jessfraz reopened this. Ability to create large volumes of up to 1 PB 1. File System ของคุณจะต้องเป็น. Learn more. Go to Snapshot Replication > Snapshots. Storage Manager Btrfs. personalt @personalt*. Hi! Come and join us at Synology Community. Businesses need data protection to prevent data loss from accidental deletion, application crashes, data corruption, and viruses. Snapshot Manager for VMware/Windows: Application-consistent snapshots; Synology High Availability (SHA): Ensures the reliability of LUN and iSCSI services. FS-series. The snapshots do not take up any space. You can create one-to-many/extended replications for a shared folder to at most 3 different destinations. Follow the steps in 1 to 4 of Replicate snapshot to a remote Synology NAS over the network. Choose "NAS Recovery" from the software's menu when it opens. You will see a confirmation message. You can browse and restore snapshots using Snapshot Replication, File Station, Windows File Explorer, or other file protocols. Create immutable snapshots on a remote server. UUID=uuid /media/user/Backup btrfs noauto,user,compress-force=zstd:6. I am not sure if this is due to launching the server as container via docker, or if it is a problem due to the file system structure of synology (I think they do not use pristine BTRFS but with LVM). If nothing changes , no new version is ever created. So now, we are with LUNs on top of BTRFS volume. Snapshot Replication (available on Synology NAS models that support Btrfs) includes options to take snapshots on demand or configure schedules and retention policies. Reclaiming Snapshot Space in BTRFS. 51 dB(A); Temperature: 24. Establish a Strong Storage Foundation with Btrfs DS220+ features a Btrfs file system optimized by Synology to offer you high reliability and high performance. To check the space consumption of snapshots: 1. If the replication source fails, shared folders or LUNs on the replication destination can be read and written to continue to. Click Snapshot > Snapshot List. The Btrfs file system cannot repair the damaged data. Working with Btrfs - Compression. Ability to create large volumes of up to 1 PB 1. Any snapshot protection only gets you so far in case things go really bad (but with the raid setup to protect against disk failures and btrfs snapshots that might be very helpfull to protect nicely against a ransomware attack, that is still a good start). Enter the description for this snapshot. Go to Snapshot Replication > Snapshots. If using Btrfs, you should create Snapshots for all your shares! That way, the ransomware cannot modify the original data and you are still able to revert to an older version easily. Next-Generation File System Btrfs is a modern file system designed to safeguard data integrity through metadata mirroring, file self-healing, and fast snapshot replication. Copy everything from Volume1 to Volume2. Running out of ideas I decided to try and reboot again, and after the reboot my Volume usage dropped from 80% to 35% which is right about. 1 Answer. Follow the steps in 6 to 8 of Replicate snapshot to a remote Synology NAS over the network. A Snapshot is a point-in-time copy stored in the same volume used to record the whole data status at the time upon being taken. Compare specifications below and find the right model for you. In a worst-case scenario, this can cause (slightly) more CPU usage for no purpose. ; In the Set Replication Schedule page, select Immutable snapshots and set Protection period. Bitrot protection is somewhat mitigated by btrfs, not the raid config. The table below shows the Synology NAS models supporting the Btrfs file system: Series. These developers built a file system with the best data integrity and the most. btrfs subv delete <path and snapshot name>. As mentioned above, when picking between Btrfs vs. A highly populated BTRFS installation is going to run slower than a highly populated EXT4 installation due to snapshots/fragrmentation. Summary. • 7 yr. Hello, We have two synology (uk1 and uk2) which were both on DSM 5. This is on Xubuntu. Now you can use the Active backup for business. Btrfs: advanced file system for data protection. Install Snapshot Replication on both source and destination servers. Despite what some tutorials says, making snapshots "visible" is not necessary. PAT file. 06TiB 1. Hyper Backup supports both the EXT4 and the Btrfs file system, but the format of the backup data is not readable. As a result, writing new files to a container's snapshot operates at native Btrfs speeds. *. BTRFS has better snapshot support, and all your linux distros+GRUB can be one one encrypted BTRFS partition (on separate subvolumes). There are definitely drivers for ext4 and btrfs for Windows, but I am always leery of rolling the dice with file systems. I myself am using synology since 2016. Make sure that you have enough drives to create a RAID 6 storage pool: 1. ago. where /media is a mounted USB stick formatted with EXT4 or. The base layer of an image is stored as a subvolume. Snapshot Replication leverages the modern Btrfs file system to create point-in-time copies of shared folders and LUNs that can be replicated to other Synology NAS and rapidly restored in case of data. Note: You can press and hold Ctrl or Shift to select multiple items. Snapshot support. run to install the snapshot driver and agent. The FS2017 is the ideal storage solution for operating load-critical virtual machines. A snapshot is a subvolume that shares its data and metadata with another subvolume, using COW capabilities. Click OK to finish. Here you enter the ip to the nas itself or 127. Synology Backup SuiteHardware-Assisted Data Transfer: Data transferring can be done quickly on your Synology NAS without taking up the resource of the hosts when copying data on VMware ESXi and Microsoft Hyper-V hosts. When the conditions specified in the Environment section are met, you can create a volume that is larger than 200 TB and up to 1 PB. 2) Here's the command the UI uses when you manually start a volume defrag on DSM 6 with BTRFS /sbin/btrfs filesystem defragment -r. If the replication source fails, shared folders or LUNs on the replication destination can be read and written to continue to. Snapshots are made in the source drive and should be turned on no matter if you do further steps. Delete the 4tb drive. With scheduled snapshots, Snapshot Replication will automatically take snapshots at the pre-determined time and frequency, and it will thus lighten your workload to take. Block-level data protection. Snapshot Replication (available on Synology NAS models that support Btrfs) includes options to take snapshots on demand or configure schedules and retention policies. Click Delete to confirm the removal. Select a time range no shorter than a week by specifying the start and end date. Select a shared folder you wish to remove the snapshots of. Reply more reply. That's mentioned on Synology's site. g. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. [ OK ] Started Synology Building Tasks Restore for Storage Manager. There’s a setting somewhere that can limit the times. HD6500. Since snapshots are a standard btrfs feature, you don't need to use the GUI's facilities (though they do work rather nicely). Which support snapshots, and copy on write technology. You will see a confirmation message. Step 1. • Advanced Btrfs file system offering 65,000 system-wide snapshots and 1,024 snapshots per shared folder • Anywhere access with iOS/Android™/ Windows ready mobile apps Optimal Performance and Hardware Design Synology DS418play is a 4-bay network attached storage solution equipped with anBy passing this option when adding a new user, a new Btrfs subvolume will be created. Snapshot: With the help of Btrfs file system features, instant snapshots and replication are available. Select one or more snapshots you wish to remove, and click Remove. Block-level data protection. Note: You can press and hold Ctrl or Shift to select multiple items. Synology DS220+ is a compact network-attached storage solution designed to streamline your data and multimedia management. However, you can enable Pin all. 04GB of allocated data, yet there is 1. So your day 1 snapshot will contain the original directory block as well as all unchanged blocks and your current state will contain the new directory block and not the old one. If you changed multiple times a file in between 2 snapshots , you will still only have 2 "versions" of the file. The Synology DiskStation Manager (DSM) operating system that powers DS423+ uses the advanced Btrfs file system, which safeguards your data against corruption and allows for the reversal of any unintended or malicious changes through the use of snapshot technology. I did have a pretty seamless transition to btrfs so it looks like I'm in business. 0. To check the space consumption of snapshots: 1. The drives within a storage pool must be of the same type. Snapshot replication takes things a step further and allows you to replicate a folder with snapshots to a different Synology NAS (or locally). Learn more about Btrfs. Snapshots are not backups, as snapshots are only on your local NAS and meant for restoring accidential edits/deleting. HD-series. it really isn’t!). 0. A snapshot is also subvolume, but with a given initial content of the original subvolume. Series. Synology DiskStation Manager (DSM), the operating system that powers the DS223, leverages the efficient Btrfs file system to protect your data against data corruption and roll back any accidental or malicious changes thanks to the snapshot technology. Select a shared folder you wish to remove the snapshots of. 6. First list them: cd /your/mount. You should be able to suspend the scrub command with btrfs scrub cancel /dev/mapper/<device>. The Btrfs file system introduces advanced storage technologies and optimized snapshots to prevent data corruption and reduce maintenance overhead. The compress-force=alg[:level] mount option can be used instead, which makes Btrfs skip checking if compression shrinks the first portion, and enables automatic compression try for every file. A. Share. My understanding is that rebuilding that kind of loss from SnapRAID would be a long process if it were even possible at all --. I’ve had the same issues and resolved the freezing by running sudo btrfs quota disable, the qgroups options had already been disabled in my timeshift settings since init. HD6500. I have worked out the following command to get the creation time of the snapshots. We are assuming it is /dev/sda1. BtrFS may be useful if you just fill the volume to 50% or less or don’t write much. It features smooth data sharing, video streaming, and photo indexing, as well as well-rounded data protection and recovery options. First there is the local snapshot replication, but if it is critical data, you might want to do two things: Snapshot Remote Replication. S. The snapshot replication wizard only lists local btrfs volumes, so it doesn't show the USB drive (which I mkfs. 2 and above versions support instant snapshot and restoration; Maximum number of concurrent LUN backup tasks: 1; Minimum LUN size: 1 GB As mentioned above, when picking between Btrfs vs. Shared folders located in volumes using the Btrfs file system LUNs created as Standard LUNs with storage acceleration or Advanced LUNs Snapshot Replication has defined. They protect you form ransomware, file corruption, and even dumb deletes, all at. They protect you form ransomware, file corruption, and even dumb deletes, all at an incredibly low cost. The Btrfs file system cannot repair the damaged data. I always create a snapshot afterwards of the target folder on the NAS, so its safe for Randomware or unwanted changes. Creating a 1 PB volume. Data Storage. You can see the number of snapshots taken within the selected time. exFAT is best option for USB drives.