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Forum Discussion
upgrading hdd in ReadyNAS x4
i have 2 ReadyNAS x4 ... The grey model (ultra 4) and the black version (Pro) Grey model (Ultra 4) have 4tb + 6tb + 3tb + 3tb And black (pro) model have 4x 2tb I want to buy another 6tb to p...
So i ended up buying the 6TB Red
When i receive it, i just remove one of the 3TB drives and replace it with the 6TB. Array will rebuild by itself, nothing else to do ?
No need to backup first ? You will probably say "always backup before doing anything" but i mean, usually nothing goes wrong when changing 1 disk, it's just like one of the disk failed and i have to replace it with another, right ?
Well you should backup regularly anyway unless you don't care about your data. No important data should be stored on just the one device.
When you replace a disk in a single redundant volume the volume is unprotected till the resulting resync completes. If another disk is failing (disks can fail without any warning) and dies during the heavy stress of the resync then you could end up needing to restore from backup or consider purchasing data recovery which may ultimately prove to be partially/fully unsuccessful.
Some good things to do would include, downloading your logs (see the Sending Logs link in my sig - no need to send these in atm, but that articles shows how to download them) before adding the disk and keeping those logs in a safe place (they could be useful in the unlikely event something goes wrong)
You should also check the SMART stats of the disks. If a disk appears to be failing then obviously replace that disk first.I would also suggest downloading the logs after a disk has been added to the array as that could also be useful in the unlikely event something goes wrong.
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