Found a set of disk in my pile that came out of a Buffalo NAS
root@debian:~# mdadm --detail /dev/md127
/dev/md127:
Version : 1.2
Creation Time : Thu May 28 11:42:20 2015
Raid Level : raid5
Array Size : 1953259520 (1862.77 GiB 2000.14 GB)
Used Dev Size : 976629760 (931.39 GiB 1000.07 GB)
Raid Devices : 3
Total Devices : 3
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Thu Oct 3 01:21:52 2019
State : active
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Consistency Policy : bitmap
Name : buffalo:0
UUID : 817c66c9:ab5aba3d:46cf3be0:c46fd224
Events : 11591
Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 49 1 active sync /dev/sdd1
2 8 33 2 active sync /dev/sdc1
root@debian:~# pvdisplay /dev/md127 --- Physical volume --- PV Name /dev/md127 VG Name raid5 PV Size <1.82 TiB / not usable 4.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 476869 Free PE 338357 Allocated PE 138512 PV UUID 2UPreL-vdQI-NdXn-xfhR-BxgN-FADg-UpYjVn
root@debian:~# vgdisplay raid5 --- Volume group --- VG Name raid5 System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 9 VG Access read/write VG Status resizable MAX LV 0 Cur LV 7 Open LV 5 Max PV 0 Cur PV 1 Act PV 1 VG Size <1.82 TiB PE Size 4.00 MiB Total PE 476869 Alloc PE / Size 138512 / 541.06 GiB Free PE / Size 338357 / 1.29 TiB VG UUID ADkPZw-R27s-6FUZ-3LW7-JUOV-oPyW-55pWu4
root@debian:~# lvdisplay raid5 --- Logical volume --- LV Path /dev/raid5/root LV Name root VG Name raid5 LV UUID CRKUp4-a5lj-QeI2-mdiX-ifxY-3OH5-wVWGOw LV Write Access read/write LV Creation host, time buffalo, 2015-05-28 11:50:46 +1000 LV Status available # open 1 LV Size 37.25 GiB Current LE 9536 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 4096 Block device 253:2 --- Logical volume --- LV Path /dev/raid5/swap LV Name swap VG Name raid5 LV UUID iGclU8-Fm3T-GSgD-L8AP-UJDk-Y5H3-iiQmWo LV Write Access read/write LV Creation host, time buffalo, 2015-05-28 11:51:00 +1000 LV Status available # open 0 LV Size 3.81 GiB Current LE 976 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 4096 Block device 253:3 --- Logical volume --- LV Path /dev/raid5/zpool1 LV Name zpool1 VG Name raid5 LV UUID clahFF-RXYF-QsQ3-xBgG-rMa9-y0Ac-8zDdit LV Write Access read/write LV Creation host, time buffalo, 2015-05-28 13:36:22 +1000 LV Status available # open 1 LV Size 100.00 GiB Current LE 25600 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 4096 Block device 253:4 --- Logical volume --- LV Path /dev/raid5/zpool2 LV Name zpool2 VG Name raid5 LV UUID 3v95G3-Uev9-V3LI-PyYt-WzXu-kdch-fNMsjP LV Write Access read/write LV Creation host, time buffalo, 2015-05-28 13:36:26 +1000 LV Status available # open 1 LV Size 100.00 GiB Current LE 25600 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 4096 Block device 253:5 --- Logical volume --- LV Path /dev/raid5/zpool3 LV Name zpool3 VG Name raid5 LV UUID y4McZn-hLW3-jQR2-Pzkz-9QEc-Jd5p-TZ9idI LV Write Access read/write LV Creation host, time buffalo, 2015-05-28 13:36:29 +1000 LV Status available # open 1 LV Size 100.00 GiB Current LE 25600 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 4096 Block device 253:6 --- Logical volume --- LV Path /dev/raid5/zpool4 LV Name zpool4 VG Name raid5 LV UUID DOO9th-5B32-9kX6-NkwG-4Dbx-AKcN-83XiAT LV Write Access read/write LV Creation host, time buffalo, 2015-05-28 13:36:32 +1000 LV Status available # open 1 LV Size 100.00 GiB Current LE 25600 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 4096 Block device 253:7 --- Logical volume --- LV Path /dev/raid5/macmini LV Name macmini VG Name raid5 LV UUID XL6d9V-SGfH-6m16-WH8E-JobI-oGn9-HuGDjL LV Write Access read/write LV Creation host, time buffalo, 2015-06-01 13:46:25 +1000 LV Status available # open 0 LV Size 100.00 GiB Current LE 25600 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 4096 Block device 253:8
Upgrading ZFS/zPool
Disks are now in a Debian 10 machine and the original version was v4 ZFS and v23 zPool created via ” zfs-fuse 0.7.2 “
ZFS
root@debian:~# zfs list NAME USED AVAIL REFER MOUNTPOINT tank 57.3G 328G 57.3G /tank
root@debian:~# zfs get version NAME PROPERTY VALUE SOURCE tank version 4 -
root@debian:/# zfs upgrade This system is currently running ZFS filesystem version 5. The following filesystems are out of date, and can be upgraded. After being upgraded, these filesystems (and any 'zfs send' streams generated from subsequent snapshots) will no longer be accessible by older software versions. VER FILESYSTEM --- ------------ 4 tank
root@debian:/# zfs upgrade tank 1 filesystems upgraded
zPool
root@debian:~# zpool get version NAME PROPERTY VALUE SOURCE tank version 23 local
root@debian:~# zpool list tank NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT tank 398G 73.2G 325G - - 18% 1.00x ONLINE -
root@debian:~# zpool status
pool: tank
state: ONLINE
status: The pool is formatted using a legacy on-disk format. The pool can
still be used, but some features are unavailable.
action: Upgrade the pool using 'zpool upgrade'. Once this is done, the
pool will no longer be accessible on software that does not support
feature flags.
scan: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
zpool1 ONLINE 0 0 0
zpool2 ONLINE 0 0 0
zpool3 ONLINE 0 0 0
zpool4 ONLINE 0 0 0
errors: No known data errors
root@debian:/# zpool upgrade tank This system supports ZFS pool feature flags. Successfully upgraded 'tank' from version 23 to feature flags. Enabled the following features on 'tank': async_destroy empty_bpobj lz4_compress multi_vdev_crash_dump spacemap_histogram enabled_txg hole_birth extensible_dataset embedded_data bookmarks filesystem_limits large_blocks large_dnode sha512 skein edonr userobj_accounting
root@debian:/# zpool get version NAME PROPERTY VALUE SOURCE tank version - default
root@debian:/# zpool status
pool: tank
state: ONLINE
scan: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
zpool1 ONLINE 0 0 0
zpool2 ONLINE 0 0 0
zpool3 ONLINE 0 0 0
zpool4 ONLINE 0 0 0
errors: No known data errors
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