Re: block size: 512B configured, 4096B native all of a sudden
- In reply to: mike tancsa : "Re: block size: 512B configured, 4096B native all of a sudden"
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Date: Mon, 22 Apr 2024 19:13:08 UTC
On 4/22/2024 12:05 PM, mike tancsa wrote: > On 4/22/2024 11:49 AM, Dag-Erling Smørgrav wrote: >> mike tancsa<mike@sentex.net> writes: >>> I was afraid of that. So basically I have to copy the entire pool or >>> live with the performance penalty :( 73TB is a lot to copy / move. >> Oh I didn't realize those disks were part of the larger pool, I thought >> they were a separate pool named “special”. You might be able to simply >> detach and then re-attach both drives, afaik a draid can function >> without its special vdev. > > Yeah, its an actual special vdev I added to speed up metadata and > small file access. zpool-detach I think only works on mirrors and not > raidz vdevs. From searching google, there does not seem to be a way > to detach a special vdev from a raidz pool. > > I think I confirmed my suspicion with a quick test pool truncate -s 100G /quirk-test/junk.raw truncate -s 100G /quirk-test/junk2.raw mdconfig -f /quirk-test/junk.raw mdconfig -f /quirk-test/junk2.raw gpart create -s gpt md0 gpart create -s gpt md1 gpart add -s 20G -t freebsd-zfs /dev/md0 gpart add -s 20G -t freebsd-zfs /dev/md0 gpart add -s 20G -t freebsd-zfs /dev/md0 gpart add -s 20G -t freebsd-zfs /dev/md1 gpart add -s 20G -t freebsd-zfs /dev/md1 gpart add -s 20G -t freebsd-zfs /dev/md1 zpool create testpool raidz1 /dev/md0p1 /dev/md1p1 /dev/md0p2 /dev/md1p2 zpool add testpool special mirror /dev/md0p3 /dev/md1p3 zpool status pool: testpool state: ONLINE config: NAME STATE READ WRITE CKSUM testpool ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 md0p1 ONLINE 0 0 0 md1p1 ONLINE 0 0 0 md0p2 ONLINE 0 0 0 md1p2 ONLINE 0 0 0 special mirror-1 ONLINE 0 0 0 md0p3 ONLINE 0 0 0 md1p3 ONLINE 0 0 0 # zpool remove testpool mirror-1 cannot remove mirror-1: invalid config; all top-level vdevs must have the same sector size and not be raidz. zpool detach just nukes the mirror I think for the special vdev # zpool detach testpool /dev/md1p3 # zpool status pool: quirk-test state: ONLINE scan: resilvered 128G in 00:08:52 with 0 errors on Mon Apr 8 14:37:29 2024 config: NAME STATE READ WRITE CKSUM quirk-test ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 da4p1 ONLINE 0 0 0 da1p1 ONLINE 0 0 0 da2p1 ONLINE 0 0 0 da5p1 ONLINE 0 0 0 errors: No known data errors pool: testpool state: ONLINE config: NAME STATE READ WRITE CKSUM testpool ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 md0p1 ONLINE 0 0 0 md1p1 ONLINE 0 0 0 md0p2 ONLINE 0 0 0 md1p2 ONLINE 0 0 0 special md0p3 ONLINE 0 0 0 errors: No known data errors # zpool remove testpool /dev/md0p3 cannot remove /dev/md0p3: invalid config; all top-level vdevs must have the same sector size and not be raidz. # zpool detach testpool /dev/md0p3 cannot detach /dev/md0p3: only applicable to mirror and replacing vdevs ---Mike