So I am using ZFS on my Nas4Free installation (v5000 zfs) and I had a failed drive. Background: 20x 3TB SATA mirror and then striped in the same pool, 2x 3TB hotspares (not sure if these work – maybe more information later), and a raid card level ZIL of 120GB SSDs.<\/p>\n
One of the drives in the mirror failed out. Had a technician replace the drive, but forgot to offline it before the drive was replaced. Since this was my first time with a pure ZFS environment (usually I had the raid controller do the heavy lifting and ZFS was just sitting there), I detached the drive. Caused all sorts of issues.<\/p>\n
so then I had:<\/p>\n
#zpool status -v
\n NAME STATE READ WRITE CKSUM
\n zfs ONLINE 0 0 0
\n mirror-0 ONLINE 0 0 0
\n da3 ONLINE 0 0 0
\n da4 ONLINE 0 0 0
\n mirror-1 ONLINE 0 0 0
\n da5 ONLINE 0 0 0
\n da6 ONLINE 0 0 0
\n mirror-2 ONLINE 0 0 0
\n da7 ONLINE 0 0 0
\n da8 ONLINE 0 0 0
\n mirror-3 ONLINE 0 0 0
\n da9 ONLINE 0 0 0
\n da10 ONLINE 0 0 0
\n mirror-4 ONLINE 0 0 0
\n da11 ONLINE 0 0 0
\n da12 ONLINE 0 0 0
\n da14 ONLINE 0 0 0
\n mirror-6 ONLINE 0 0 0
\n da15 ONLINE 0 0 0
\n da16 ONLINE 0 0 0
\n mirror-7 ONLINE 0 0 0
\n da17 ONLINE 0 0 0
\n da18 ONLINE 0 0 0
\n mirror-8 ONLINE 0 0 0
\n da19 ONLINE 0 0 0
\n da20 ONLINE 0 0 0
\n logs
\n da1p1 ONLINE 0 0 0
\n spares
\n da21 AVAIL
\n da22 AVAIL\n<\/p><\/blockquote>\nWe can see mirror-5 was just a single stripe disk. Awesome.<\/p>\n
After adding in the drive and formatting via the GUI for ZFS, I then ran:
\nzpool attach zfs \/dev\/da14 \/dev\/da13<\/code>
\nzpool attach YOURPOOLNAME \/dev\/YOURDEVICETHATSWORKING \/dev\/YOURNEWDEVICE<\/code><\/p>\n# zpool status
\n pool: zfs
\n state: ONLINE
\nstatus: One or more devices is currently being resilvered. The pool will
\n continue to function, possibly in a degraded state.
\naction: Wait for the resilver to complete.
\n scan: resilver in progress since Tue Aug 19 13:51:48 2014
\n 3.23G scanned out of 1.41T at 276M\/s, 1h29m to go
\n 322M resilvered, 0.22% done<\/p><\/blockquote>\nIt actually finished in 40 minutes with no errors. Resilvering is a type of scrub, so a scrub cannot be running at the same time.<\/p>\n
Then, just to be sure, I ran the scrub to verify data integrity:
\nzpool scrub zfs<\/code>
\nzpool scrub YOURPOOLNAME<\/code><\/p>\nTo Stop a scrub
\nzpool scrub -s YOURPOOLNAME<\/code><\/p>\nVerify status with (this checks all known data to be valid):
\nzpool status -v<\/code><\/p>\n# zpool status
\n pool: zfs
\n state: ONLINE
\n scan: scrub in progress since Tue Aug 19 17:06:45 2014
\n 22.8G scanned out of 1.41T at 614M\/s, 0h39m to go
\n 0 repaired, 1.57% done\n<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"So I am using ZFS on my Nas4Free installation (v5000 zfs) and I had a failed drive. Background: 20x 3TB SATA mirror and then striped in the same pool, 2x 3TB hotspares (not sure if these work – maybe more information later), and a raid card level ZIL of 120GB SSDs. One of the drives … Continue reading ZFS Zpool Replace Failed Drive<\/span>