![]() This means even if my main NAS completely fails, I can still use all my data and I retail all past file history, as ALL snapshots are replicated. So the data on the second NAS is at the very oldest, 15 minutes out of date. The replication occurs after each snapshot. But I am using a portion of that to replicate the data and all snapshots. This NAS is actually a VM in ESXi, but it has 12 x 8TB disks in RAIDZ2 for bulk media. I replicate those snapshots over to a second NAS in my rack. To turn these into "Backups" I'm doing replication Replicated Snapshots / Local Backup Snapshots themselves are not a backup, as if the entire array fails, the snapshots are gone too. But they don't use extra storage space for new files. So if I delete a 10GB file, I don't get that 10GB back until the snapshots expire. Snapshots don't consume any extra space other than retaining the removed files. This means if I delete a file, alter a file, or get hit with ransomware, I can easily go back in time to an earlier version of the file. A Snapshot every week with 12 months of retention.A Snapshot every day with 2 weeks of retention.A Snapshot every hour with 2 days of retention.A Snapshot every 15 minutes with 8 hours of retention.Here is the snapshot schedule I landed on: However, not if you use encryption! Huge deal breaker there. NOTE: Synology does support this functionality with showing up in Windows. These snapshots show up in "Previous Versions" in Windows, allowing a very easy way to get files back. Snapshots allow me to instantly roll back a file, folder, or the entire filesystem to a point in time I have TrueNAS take ZFS snapshots every 15 minutes. This means if someone steals the NAS, its impossible for them to get to the data Snapshots The NAS is encrypted with a passphrase, meaning that when the NAS boots, I must manually log in and enter the passphrase to unlock the data. To log into the system you need the root password, as well a the 2FA code for added protection The system has redundant PSU's, and is backed up by a double conversion UPS This system has a dual port SFP28 NIC, connected with 2 x 10G SPF+ connections. I could have gone with RAIDZ2 or RAIDZ3 for more protection, but I was looking good performance with this array, and capacity wasn't a concern. This is fine, as I have very good backups and replication. They would have to be from seperate VDEV's though, if I lose both drives in a VDEV, all the data is gone. This means I could withstand a max of 4 drive failures. My main data array consists of 6 x 4TB hard drives (A mix of SATA and SAS) in three x mirrored VDEV's, and another mirrored VDEV for Metadata consisting of Intel Enterprise SSD's. Because of the check summing taking place, its almost impossible to get a corrupted file from Bitrot. Data Storage and ProtectionĪll of my Data is stored on a new TrueNAS box, which is using ZFS as the filesystem. Bulk media storage is not included in this. This post highlights only how I am protecting my actual important data like documents and photos. Since then, I have completely moved off of my Synology NAS which forced me to make some changes.
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