I have a raidz2 pool that has been experiencing checksum errors. However, when I run zpool status -v, it does not list any erroneous files.
I have performed multiple zfs clear and zfs scrub, each time resulting in 18 CKSUM errors for every disk and “repaired 0B with 9 errors”.
Despite these errors, the zpool status -v command for my pool does not display any specific files with issues. Here are the details of my pool configuration and the error status:
zpool status -v home-pool
pool: home-pool
state: ONLINE
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 repaired 0B in 1 days 16:20:56 with 9 errors on Fri Mar 14 15:02:37 2025
config:
NAME STATE READ WRITE CKSUM
home-pool ONLINE 0 0 0
raidz2-0 ONLINE 0 0 0
db91f778-e537-46dc-95be-bb0c1d327831 ONLINE 0 0 18
b3902de3-6f48-4214-be96-736b4b498b61 ONLINE 0 0 18
3e6f9c7e-bf9a-41d1-b37c-a1deb4b9e776 ONLINE 0 0 18
295cd467-cce3-4a81-9b0a-0db1f992bf37 ONLINE 0 0 18
984d0225-0f8e-4286-ab07-f8f108a6a0ce ONLINE 0 0 18
f70d7e08-8810-4428-a96c-feb26b3d5e96 ONLINE 0 0 18
cache
748a0c72-51ea-473b-b719-f937895370f4 ONLINE 0 0 0
errors: Permanent errors have been detected in the following files:
Sometimes I can get a “errors: No known data errors” output, but still with 18 CKSUM errors.
zpool status -v home-pool
pool: home-pool
state: ONLINE
status: One or more devices has experienced an unrecoverable error. An
attempt was made to correct the error. Applications are unaffected.
action: Determine if the device needs to be replaced, and clear the errors
using 'zpool clear' or replace the device with 'zpool replace'.
see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-9P
scan: scrub repaired 0B in 1 days 16:20:56 with 9 errors on Fri Mar 14 15:02:37 2025
config:
NAME STATE READ WRITE CKSUM
home-pool ONLINE 0 0 0
raidz2-0 ONLINE 0 0 0
db91f778-e537-46dc-95be-bb0c1d327831 ONLINE 0 0 18
b3902de3-6f48-4214-be96-736b4b498b61 ONLINE 0 0 18
3e6f9c7e-bf9a-41d1-b37c-a1deb4b9e776 ONLINE 0 0 18
295cd467-cce3-4a81-9b0a-0db1f992bf37 ONLINE 0 0 18
984d0225-0f8e-4286-ab07-f8f108a6a0ce ONLINE 0 0 18
f70d7e08-8810-4428-a96c-feb26b3d5e96 ONLINE 0 0 18
cache
748a0c72-51ea-473b-b719-f937895370f4 ONLINE 0 0 0
errors: No known data errors
And when I run zpool events, I can find some “ereport.fs.zfs.checksum”
Mar 11 2025 16:32:28.610303588 ereport.fs.zfs.checksum
class = "ereport.fs.zfs.checksum"
ena = 0x8bc9037aabb07001
detector = (embedded nvlist)
version = 0x0
scheme = "zfs"
pool = 0xb85e01d1d3ace3bb
vdev = 0x6d1d5a4549645764
(end detector)
pool = "home-pool"
pool_guid = 0xb85e01d1d3ace3bb
pool_state = 0x0
pool_context = 0x0
pool_failmode = "continue"
vdev_guid = 0x6d1d5a4549645764
vdev_type = "disk"
vdev_path = "/dev/disk/by-partuuid/295cd467-cce3-4a81-9b0a-0db1f992bf37"
vdev_ashift = 0x9
vdev_complete_ts = 0x348bc903872f2
vdev_delta_ts = 0x1a38cd4
vdev_read_errors = 0x0
vdev_write_errors = 0x0
vdev_cksum_errors = 0x4
vdev_delays = 0x0
dio_verify_errors = 0x0
parent_guid = 0xbe381bdf1550a88
parent_type = "raidz"
vdev_spare_paths =
vdev_spare_guids =
zio_err = 0x34
zio_flags = 0x2000b0 [SCRUB SCAN_THREAD CANFAIL DONT_PROPAGATE]
zio_stage = 0x400000 [VDEV_IO_DONE]
zio_pipeline = 0x5e00000 [VDEV_IO_START VDEV_IO_DONE VDEV_IO_ASSESS CHECKSUM_VERIFY DONE]
zio_delay = 0x0
zio_timestamp = 0x0
zio_delta = 0x0
zio_priority = 0x4 [SCRUB]
zio_offset = 0xc2727307000
zio_size = 0x8000
zio_objset = 0xc30
zio_object = 0x6
zio_level = 0x0
zio_blkid = 0x1f2526
time = 0x67cff51c 0x24607e64
eid = 0x9c68
Mar 11 2025 16:32:28.610303588 ereport.fs.zfs.checksum
class = "ereport.fs.zfs.checksum"
ena = 0x8bc9037aabb07001
detector = (embedded nvlist)
version = 0x0
scheme = "zfs"
pool = 0xb85e01d1d3ace3bb
vdev = 0x661aa750e3992e00
(end detector)
pool = "home-pool"
pool_guid = 0xb85e01d1d3ace3bb
pool_state = 0x0
pool_context = 0x0
pool_failmode = "continue"
vdev_guid = 0x661aa750e3992e00
vdev_type = "disk"
vdev_path = "/dev/disk/by-partuuid/3e6f9c7e-bf9a-41d1-b37c-a1deb4b9e776"
vdev_ashift = 0x9
vdev_complete_ts = 0x348bc90106906
vdev_delta_ts = 0x5aef730
vdev_read_errors = 0x0
vdev_write_errors = 0x0
vdev_cksum_errors = 0x4
vdev_delays = 0x0
dio_verify_errors = 0x0
parent_guid = 0xbe381bdf1550a88
parent_type = "raidz"
vdev_spare_paths =
vdev_spare_guids =
zio_err = 0x34
zio_flags = 0x2000b0 [SCRUB SCAN_THREAD CANFAIL DONT_PROPAGATE]
zio_stage = 0x400000 [VDEV_IO_DONE]
zio_pipeline = 0x5e00000 [VDEV_IO_START VDEV_IO_DONE VDEV_IO_ASSESS CHECKSUM_VERIFY DONE]
zio_delay = 0x0
zio_timestamp = 0x0
zio_delta = 0x0
zio_priority = 0x4 [SCRUB]
zio_offset = 0xc2727307000
zio_size = 0x8000
zio_objset = 0xc30
zio_object = 0x6
zio_level = 0x0
zio_blkid = 0x1f2526
time = 0x67cff51c 0x24607e64
eid = 0x9c69
Mar 11 2025 16:32:28.610303588 ereport.fs.zfs.checksum
class = "ereport.fs.zfs.checksum"
ena = 0x8bc9037aabb07001
detector = (embedded nvlist)
version = 0x0
scheme = "zfs"
pool = 0xb85e01d1d3ace3bb
vdev = 0x27addaa7620a5f3e
(end detector)
pool = "home-pool"
pool_guid = 0xb85e01d1d3ace3bb
pool_state = 0x0
pool_context = 0x0
pool_failmode = "continue"
vdev_guid = 0x27addaa7620a5f3e
vdev_type = "disk"
vdev_path = "/dev/disk/by-partuuid/b3902de3-6f48-4214-be96-736b4b498b61"
vdev_ashift = 0x9
vdev_complete_ts = 0x348bc8f9f5e17
vdev_delta_ts = 0x42d97
vdev_read_errors = 0x0
vdev_write_errors = 0x0
vdev_cksum_errors = 0x4
vdev_delays = 0x0
dio_verify_errors = 0x0
parent_guid = 0xbe381bdf1550a88
parent_type = "raidz"
vdev_spare_paths =
vdev_spare_guids =
zio_err = 0x34
zio_flags = 0x2000b0 [SCRUB SCAN_THREAD CANFAIL DONT_PROPAGATE]
zio_stage = 0x400000 [VDEV_IO_DONE]
zio_pipeline = 0x5e00000 [VDEV_IO_START VDEV_IO_DONE VDEV_IO_ASSESS CHECKSUM_VERIFY DONE]
zio_delay = 0x0
zio_timestamp = 0x0
zio_delta = 0x0
zio_priority = 0x4 [SCRUB]
zio_offset = 0xc2727307000
zio_size = 0x8000
zio_objset = 0xc30
zio_object = 0x6
zio_level = 0x0
zio_blkid = 0x1f2526
time = 0x67cff51c 0x24607e64
eid = 0x9c6a
Mar 11 2025 16:32:28.610303588 ereport.fs.zfs.checksum
class = "ereport.fs.zfs.checksum"
ena = 0x8bc9037aabb07001
detector = (embedded nvlist)
version = 0x0
scheme = "zfs"
pool = 0xb85e01d1d3ace3bb
vdev = 0x32f2d10d0eb7e000
(end detector)
pool = "home-pool"
pool_guid = 0xb85e01d1d3ace3bb
pool_state = 0x0
pool_context = 0x0
pool_failmode = "continue"
vdev_guid = 0x32f2d10d0eb7e000
vdev_type = "disk"
vdev_path = "/dev/disk/by-partuuid/db91f778-e537-46dc-95be-bb0c1d327831"
vdev_ashift = 0x9
vdev_complete_ts = 0x348bc8f9f763b
vdev_delta_ts = 0x343c3
vdev_read_errors = 0x0
vdev_write_errors = 0x0
vdev_cksum_errors = 0x4
vdev_delays = 0x0
dio_verify_errors = 0x0
parent_guid = 0xbe381bdf1550a88
parent_type = "raidz"
vdev_spare_paths =
vdev_spare_guids =
zio_err = 0x34
zio_flags = 0x2000b0 [SCRUB SCAN_THREAD CANFAIL DONT_PROPAGATE]
zio_stage = 0x400000 [VDEV_IO_DONE]
zio_pipeline = 0x5e00000 [VDEV_IO_START VDEV_IO_DONE VDEV_IO_ASSESS CHECKSUM_VERIFY DONE]
zio_delay = 0x0
zio_timestamp = 0x0
zio_delta = 0x0
zio_priority = 0x4 [SCRUB]
zio_offset = 0xc2727307000
zio_size = 0x8000
zio_objset = 0xc30
zio_object = 0x6
zio_level = 0x0
zio_blkid = 0x1f2526
time = 0x67cff51c 0x24607e64
eid = 0x9c6b
Mar 11 2025 16:32:28.610303588 ereport.fs.zfs.checksum
class = "ereport.fs.zfs.checksum"
ena = 0x8bc9037aabb07001
detector = (embedded nvlist)
version = 0x0
scheme = "zfs"
pool = 0xb85e01d1d3ace3bb
vdev = 0x4e86f9eec21f5e19
(end detector)
pool = "home-pool"
pool_guid = 0xb85e01d1d3ace3bb
pool_state = 0x0
pool_context = 0x0
pool_failmode = "continue"
vdev_guid = 0x4e86f9eec21f5e19
vdev_type = "disk"
vdev_path = "/dev/disk/by-partuuid/f70d7e08-8810-4428-a96c-feb26b3d5e96"
vdev_ashift = 0x9
vdev_complete_ts = 0x348bc902e5afa
vdev_delta_ts = 0x7523e
vdev_read_errors = 0x0
vdev_write_errors = 0x0
vdev_cksum_errors = 0x4
vdev_delays = 0x0
dio_verify_errors = 0x0
parent_guid = 0xbe381bdf1550a88
parent_type = "raidz"
vdev_spare_paths =
vdev_spare_guids =
zio_err = 0x34
zio_flags = 0x2000b0 [SCRUB SCAN_THREAD CANFAIL DONT_PROPAGATE]
zio_stage = 0x400000 [VDEV_IO_DONE]
zio_pipeline = 0x5e00000 [VDEV_IO_START VDEV_IO_DONE VDEV_IO_ASSESS CHECKSUM_VERIFY DONE]
zio_delay = 0x0
zio_timestamp = 0x0
zio_delta = 0x0
zio_priority = 0x4 [SCRUB]
zio_offset = 0xc2727306000
zio_size = 0x8000
zio_objset = 0xc30
zio_object = 0x6
zio_level = 0x0
zio_blkid = 0x1f2526
time = 0x67cff51c 0x24607e64
eid = 0x9c6c
Mar 11 2025 16:32:28.610303588 ereport.fs.zfs.checksum
class = "ereport.fs.zfs.checksum"
ena = 0x8bc9037aabb07001
detector = (embedded nvlist)
version = 0x0
scheme = "zfs"
pool = 0xb85e01d1d3ace3bb
vdev = 0x164dd4545a3f6709
(end detector)
pool = "home-pool"
pool_guid = 0xb85e01d1d3ace3bb
pool_state = 0x0
pool_context = 0x0
pool_failmode = "continue"
vdev_guid = 0x164dd4545a3f6709
vdev_type = "disk"
vdev_path = "/dev/disk/by-partuuid/984d0225-0f8e-4286-ab07-f8f108a6a0ce"
vdev_ashift = 0x9
vdev_complete_ts = 0x348bc8faabb1e
vdev_delta_ts = 0x1ae37
vdev_read_errors = 0x0
vdev_write_errors = 0x0
vdev_cksum_errors = 0x4
vdev_delays = 0x0
dio_verify_errors = 0x0
parent_guid = 0xbe381bdf1550a88
parent_type = "raidz"
vdev_spare_paths =
vdev_spare_guids =
zio_err = 0x34
zio_flags = 0x2000b0 [SCRUB SCAN_THREAD CANFAIL DONT_PROPAGATE]
zio_stage = 0x400000 [VDEV_IO_DONE]
zio_pipeline = 0x5e00000 [VDEV_IO_START VDEV_IO_DONE VDEV_IO_ASSESS CHECKSUM_VERIFY DONE]
zio_delay = 0x0
zio_timestamp = 0x0
zio_delta = 0x0
zio_priority = 0x4 [SCRUB]
zio_offset = 0xc2727306000
zio_size = 0x8000
zio_objset = 0xc30
zio_object = 0x6
zio_level = 0x0
zio_blkid = 0x1f2526
time = 0x67cff51c 0x24607e64
eid = 0x9c6d
How can I determine which file is causing the problem, or how can I fix the errors. Or should I just let these 18 errors exists ?