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date: 2021-11-26 13:20:43
categories: linux
firstPublishDate: 2021-11-26 13:20:43
Every night, I have a system making a snapshot in my machines and transfering the snapshot to my backup server.
I recently noticed that for one dataset the snapshot transfer failed:
ssh machine "zfs send -c rpool/data@2021-11-26_00-10-01" | pv -L 10000000 | zfs recv -F backups/machine/data warning: cannot send 'rpool/data@2021-11-26_00-10-01': Input/output error 1.17GiB 0:02:06 [9.54MiB/s] cannot receive new filesystem stream: incomplete stream
In the machine, I scrubbed the pool and check the status:
zpool scrub rpool zpool status rpool pool: rpool state: DEGRADED status: One or more devices has experienced an error resulting in data corruption. Applications may be affected. action: Restore the file in question if possible. Otherwise restore the entire pool from backup. see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-8A scan: scrub in progress since Fri Nov 26 10:26:03 2021 105G scanned at 8.11G/s, 964K issued at 74.2K/s, 124G total 0B repaired, 0.00% done, no estimated completion time config: NAME STATE READ WRITE CKSUM rpool DEGRADED 0 0 0 ata-WDC_WDS100T1B0A-00H9H0_164710800985-part4 DEGRADED 0 0 1 too many errors errors: 8 data errors, use '-v' for a list
The status shows there are errors in the pool and the `scan` section shows that scrub is progress.
The command `status -v` shows where are the errors:
zpool status rpool -v errors: Permanent errors have been detected in the following files: rpool/data:<0x0> /data/git/tmp/rust/src/test/ui/conditional-compilation rpool/data@2021-11-26_00-10-01:/.cargo/registry/index/github.com-1ecc6299db9ec823/.git/objects/pack/pack-d89989aaadc7c20739f2cb81d1257112d0cddd67.pack
To fix the errors, I restored the files from backup and destroyed the snapshot with errors. To be able to create a new snapshot without errors, the pool has to be scrubbed again.
# destroy the snapshot with errors zfs destroy rpool/data@2021-11-26_00-10-01 # scrub again zpool scrub rpool # create a new snapshot zfs snapshot rpool/data@2021-11-26_00-10-01 # transfer to the backup machine ssh machine "zfs send -c rpool/data@2021-11-26_00-10-01" | pv -L 10000000 | zfs recv -F backups/machine/data
hashtags: #zfs
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