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Forum Discussion
Reallocated sectors = data loss?
Ultra 6, 3x 2TB X-RAID2 62% full I have a failing disk, unfortunately due to a mistake by me I wasn't noticing the warning emails and it looks like its been throwing a steady stream of SMART erro...
Ok I will pull that disk. The next step from tech support was to replace with one they are sending so.
I understand RAID != backup. Thats a good article though, amusing too :)
I have a reasonably recent backup of the important data. I'm interested to understand if any data on the NAS could be corrupted as I'd prefer to keep treating the NAS as the master copy but I don't want to roll over the existing backup with any corrupt data.
Is it fair to assume that *if* the remaining 2 disks are healthy no data should be damaged? I would have thought so, but again, tech support seemed to be suggesting that is not necessarily the case. I don't quite get that since RAID5 should imply total reduncancy of any single disk but maybe there is something more subtle going on with XRAID2 ?
Although its hot swappable I presume its generally better to power down for disk swaps? (I have no pressing need to keep the NAS powered on).
I understand RAID != backup. Thats a good article though, amusing too :)
I have a reasonably recent backup of the important data. I'm interested to understand if any data on the NAS could be corrupted as I'd prefer to keep treating the NAS as the master copy but I don't want to roll over the existing backup with any corrupt data.
Is it fair to assume that *if* the remaining 2 disks are healthy no data should be damaged? I would have thought so, but again, tech support seemed to be suggesting that is not necessarily the case. I don't quite get that since RAID5 should imply total reduncancy of any single disk but maybe there is something more subtle going on with XRAID2 ?
Although its hot swappable I presume its generally better to power down for disk swaps? (I have no pressing need to keep the NAS powered on).
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