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ReadyNAS 4312 disk space utilization
I have been working at this small business for over a year. We have one ReadyNAS4312. It is RAID-6 with 32.7 TB, 12 disks, and X-Raid is on. (I'm just reading about X-Raid). ReadyNAS is showing 3...
BTRFS needs some headroom to operate, so using any more of the free space is not recommended. If no users are writing to anything other than the static-sized iSCSI LUN's, then you are probably OK with a 10% margin. The NAS has no way of determining how much of the LUN you are using. It shows all of that space as used since, to it, it is, and that space does not count toward the desired BTRFS headroom.
BTRFS needs some headroom to operate, so using any more of the free space is not recommended. If no users are writing to anything other than the static-sized iSCSI LUN's, then you are probably OK with a 10% margin. The NAS has no way of determining how much of the LUN you are using. It shows all of that space as used since, to it, it is, and that space does not count toward the desired BTRFS headroom.
Thank you. I wanted to get some input in advance.
I spoke with someone who confirmed 9.66% free ought to be good enough to resync new disk and not fail on resync.
Resync completed.
Interesting, after resync the new same-size disk, the RAID no longer reports a < 10% warning.
All good, thanks again.
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