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Forum Discussion
Can't access NAS - password fail - and not showing up on TV
Hi all, Firstly, thanks for any help you might be able to give me. Mods - please move this if it needs to be in a different forum, I looked, but I couldn't work out which it needed to be in, it d...
The 4 disk minimum is raid-6 (dual redundancy), not raid-5 (single redundancy).
The default xraid blends raid-1 and raid-5. So no matter how many disks you add, you have protection against one disk failure. This mode works well for most users. Each disk you add needs to be at least as large as the biggest disk you have installed.
There are two caveats though - You can't grow a volume more than 8 TiB from your starting point, and you can't expand a volume past 16 TiB (no matter what your starting point). Since you currently have 2.5 TB, you can expand to about 10.5 TB before you reach the growth limit. At that point you'd need a factory reset. The other option is to get more drives now, and do the reset up front.
Multiple drives failures can happen in rapid succession - not very often, but more often than random chance. After all you are putting several near-identical drives into the same chassis under near-identical loads... However, if you are keeping an on-site backup and crashplan, then you still wouldn't lose data even if this were to happen.
Also, with the ultra (running 4.2.x firmware) you can move to dual redundancy easily (starting with the insertion of disk 4) - as long as they are all the same size. For example 6x2.5TB with dual redundancy would give you 10 TB of storage.
The default xraid blends raid-1 and raid-5. So no matter how many disks you add, you have protection against one disk failure. This mode works well for most users. Each disk you add needs to be at least as large as the biggest disk you have installed.
There are two caveats though - You can't grow a volume more than 8 TiB from your starting point, and you can't expand a volume past 16 TiB (no matter what your starting point). Since you currently have 2.5 TB, you can expand to about 10.5 TB before you reach the growth limit. At that point you'd need a factory reset. The other option is to get more drives now, and do the reset up front.
Multiple drives failures can happen in rapid succession - not very often, but more often than random chance. After all you are putting several near-identical drives into the same chassis under near-identical loads... However, if you are keeping an on-site backup and crashplan, then you still wouldn't lose data even if this were to happen.
Also, with the ultra (running 4.2.x firmware) you can move to dual redundancy easily (starting with the insertion of disk 4) - as long as they are all the same size. For example 6x2.5TB with dual redundancy would give you 10 TB of storage.
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