質問: Our storage server has some problems, just ago we had a broken disk (WD 4TB RE SAS), though the raidcontroller ([LSI MegaRAID 9271-8i](http://www.lsi.com/products/raid-controllers/pages/megaraid-sas-9271-8i.aspx "mega")) kept the disk online (status : ok). Only Media error showed 1 error. We decided to be save and replace the disk, during the resilvering a second and a tirth disk where marked as (resilvering) although only one disk showed 1 read error. Today the resilver is complete (no corruption, all oke), I started a scrub and was met with this : ``` zpool status pool: data state: DEGRADED status: One or more devices could not be used because the label is missing or invalid. Sufficient replicas exist for the pool to continue functioning in a degraded state. action: Replace the device using 'zpool replace'. see: http://zfsonlinux.org/msg/ZFS-8000-4J scan: scrub in progress since Thu Jan 14 10:50:00 2016 2.71T scanned out of 111T at 718M/s, 43h59m to go 0 repaired, 2.44% done config: NAME STATE READ WRITE CKSUM data DEGRADED 0 0 0 raidz2-0 DEGRADED 0 0 0 br0c2 ONLINE 0 0 0 br1c2 ONLINE 0 0 0 br2c2 ONLINE 0 0 0 br0c3 ONLINE 0 0 0 br1c3 ONLINE 0 0 0 br2c3 ONLINE 0 0 0 r2c1 ONLINE 0 0 0 r1c2 ONLINE 0 0 0 r5c3 ONLINE 0 0 0 sdb ONLINE 0 0 0 sdc ONLINE 0 0 0 7196084230607724634 FAULTED 0 0 0 was /dev/sdai1 r5c0 ONLINE 0 0 0 r0c1 ONLINE 0 0 0 r1c1 ONLINE 0 0 0 r3c1 ONLINE 0 0 0 r4c1 ONLINE 0 0 0 raidz2-1 ONLINE 0 0 0 r5c1 ONLINE 0 0 0 r0c2 ONLINE 0 0 0 r2c2 ONLINE 0 0 0 r3c2 ONLINE 0 0 0 r4c2 ONLINE 0 0 0 r5c2 ONLINE 0 0 0 r0c3 ONLINE 0 0 0 r1c3 ONLINE 0 0 0 r2c3 ONLINE 0 0 0 r3c3 ONLINE 0 0 0 r4c3 ONLINE 0 0 0 br0c0 ONLINE 0 0 0 br1c0 ONLINE 0 0 0 br2c0 ONLINE 0 0 0 br0c1 ONLINE 0 0 0 br1c1 ONLINE 0 0 0 br2c1 ONLINE 0 0 0 errors: No known data errors ``` /dev/sdai1 is online and the raidcontroller is not showing any error (not even media error). Can I try and put the disk online / offline ? update : I try'd to deatach the disk but it refuses to do so, I was under to impression that raidz2-0 has 2 parity disks (and raidz2-1 also 2) so why can't I detach ? ``` zpool detach data 7196084230607724634 cannot detach 7196084230607724634: only applicable to mirror and replacing vdevs ```
回答: Why are you passing the disks through a RAID Controller? JBOD would make more sense when using ZFS. You *could* run into Problems because of your controller. Anyway, its save to just detach and re-attach the disk. You could also try to replace the disk (without really replacing it: zpool replace pool disk) Let it resilver and scrub again.