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I have a QNAP NAS in the office. It has 4 hard disks and runs RAID 6.
The thing is, I don't know why I originally set it up to run RAID 6. I'm only getting 50% of the total disk capacity as available space, whereas if it were running RAID 5 I would get 75%. I know that RAID 6 can withstand two simultaneous disk failures whereas RAID 5 can only withstand one disk failure, but that's a risk I'm prepared to take. Everything is backed up every night and if a disk fails I can get a replacement within 24 hours.
So I think I'd like to downgrade the RAID level from 6 to 5. That's not officially supported by QNAP - in other words, their RAID migration tool won't do it. Can anyone suggest how I might do it myself, other than backing up the data, formatting the disks, rebuilding the RAID, and restoring all the data?
The thing is, I don't know why I originally set it up to run RAID 6. I'm only getting 50% of the total disk capacity as available space, whereas if it were running RAID 5 I would get 75%. I know that RAID 6 can withstand two simultaneous disk failures whereas RAID 5 can only withstand one disk failure, but that's a risk I'm prepared to take. Everything is backed up every night and if a disk fails I can get a replacement within 24 hours.
So I think I'd like to downgrade the RAID level from 6 to 5. That's not officially supported by QNAP - in other words, their RAID migration tool won't do it. Can anyone suggest how I might do it myself, other than backing up the data, formatting the disks, rebuilding the RAID, and restoring all the data?