2/28/2024 0 Comments Qnap hbs 3 usb backup![]() It might still be more trustworthy than a popular consumer board. I intentionally got a mobo without a crazy BMC with IPMI, but I still don't assume the hardware is very trustworthy. I currently have a short-depth 1U Atom-based one, which runs passively-cooled except for the PSU fan, which I've replaced with a soldered-in practically silent Noctua. I do like the simplicity of some of the Supermicro options. Without getting into questions of possible security implications/perceptions of where servers are designed and manufactured. ZFS requires upgrading your disks all at once, unRAID has single-disk performance, straight-up Linux BTRFS is "unstable".įor other popular, affordable used short-depth 1U servers that you can get with 4 external 3.5" drive bays, there's the Dell R210 II, R220, and maybe R230. For this use case, I would love to use cheaper and more performant used hardware, and not have to rely on proprietary software that phones home. Honestly curious, this is a real-life situation that me and several of my friends have done with Synology NAS. So with (10TB+10TB) + (12TB) + (12TB), Synology will give me 32 TB of usable space and I will have one drive redundancy throughout the whole time. Or say next year and two years from now 12 TB drives are cheaper. ![]() How can I perform this migration with ZFS? Going from 10 TB - 20 TB - 30 TB of capacity, adding one disk at a time, without losing redundancy. Two years from now I need another 10 TB capacity and I can afford one more disk. Next year I need more than 10 TB capacity and I can afford one more disk. You can add drives to a ZFS pool, but you need to either replace or add them in massive chunks (or smaller chunks if you're happy buying 2x as many disks as you actually need). Yes, FreeNAS/TrueNAS is cool, but I put a Synology at my dad's house. This is done while the device is running and serving data - no downtime, though things may slow down as you would expect during migration operations.įrom an end-user perspective this is a very different experience. Or, if you've finally outgrown your 6-bay device which is full of 3TB drives, you can replace the existing drives with 12TB drives, then once they've all been replaced increase the size of the array to match the new drive sizes. You pop in another 10TB drive in your RAID6 array and you increase the size of the array 10TB as you'd expect. One of the perks of something like a QNAP or a Synology is the support for simply adding a single new drive to an existing RAID5 or RAID6 array, and having the storage box add it transparently while data is migrated to the new, larger RAID array. ZFS is sexy, but it requires planning and understanding and (as stated by another poster) adding storage in pairs of drives if you want to increase storage incrementally and maintain drive redundancy. User of both QNAP devices and one of the iX systems devices here. But for the use case of me and the small businesses I support, ZFS has been a non-starter due to the costs. ![]() I would prefer to not have to rely on Synology's cost-cutting hardware and raft of probably not very secure software. Unfortunately they haven't contributed it to free software so nobody else can have it (specifically the part of passing through the parity data so that checksum errors in BTRFS can be fixed with mdraid knowledge). Synology's configuration of mdraid+BTRFS makes way more sense than ZFS. So if I want to be able to add a single drive and expand my storage at any time while keeping the same level of redundancy, ZFS makes no sense. ZFS can't do that, since it does't support modifying vdevs. I can lose any one disk, and lose no data. So I can go from an array of 3 x 10 TB disks where one is parity (20 TB usable storage), and then just pop in one more disk and now I have an array with 4 x 10 TB disks (30 TB usable storage) with the same one-disk parity. ![]() On a Synology NAS (which just uses Linux mdraid underneath the hood so this part isn't exactly some proprietary magic) if you have an array with parity (the equivalent of raid-z/z2), you can add a drive, and it expands the array with that one drive, keeping the parity and recalculating it for the new configuration of drives. But I still want to keep the data security of one or more parity drives. I want to add a single drive since I can't afford more than a single drive.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |