Is it possible to repair a ZFS detached volume … 3 disks (RAIDZ), one failed running on FreeNAS 9.10.2-U6.
I tried hot swapping failed disk but FreeNAS wouldn’t recognize bad drive to swap. I detached volume and now want to copy files from the other two and create a new volume. Running 3 2 TB WD Red disks on FreeNAS 9.10.2-U6. These disks had a 98% uptime for about 10 years with no issues. I may have pushed capacity; If i remember correctly it may have been close to 90% capacity. Not sure if this is what caused one of the drives to fail.
Ideally I would like to pull about 25% of needed files from the other 2 and start over with a new set of disks on a new volume.
Can I use the shell/terminal to view the other disks if the volume has been detached but still connected physically?
Screenshot attached. Volume is called calatrava and contains 3 2TB WD Red drives. Under Available it says “Error getting available space” under Status it says “UNKNOWN”.
Was wondering … is it possible to view or pull files from 2 of the other RAIDZ disks that were not damaged?
…which is good; screenshots of command output are hard to parse anyway. Why not copy/paste text? Put three backticks (```) above and below to preserve formatting.
While I must agree that text is better in this case, a screenshot would have been acceptable, if hardly ideal. So my question is why couldn’t you attach it? Can you describe the error you got?
1st volume -
Used - 0 (Error)
Available - Error getting available space
Compression - (nothing)
Compression Ratio - (nothing)
Status - UNKNOWN
Readonly - (nothing)
Comments - (nothing)
2nd volume -
Used - 1.3 TiB (72%) first line / 1.3 TiB (74%) second line
Available - 509.9 GiB first line / 451.9 GiB second line
Compression - first line (nothing) / second line inherit (off)
Compression Ratio - first line (nothing) / second line 1.00x
Status - first line HEALTHY / second line (nothing)
Readonly - first line (nothing) / second line inherit (off)
Comments - (nothing)
At this point I detached 1st volume. Right now pool status only shows 2nd volume.
I thought i initially setup 1st volume (3 drives) as RAIDZ (this was 10 years ago). However when i viewed 2nd volume in GUI under Status it shows 2nd Volume name, with a tick, when i tick the triangle, under volume name on second line it says mirror-0 and then the next 2 lines has the 2 drive names. All 4 lines showing ONLINE under Status. Does mirror-0 indicate RAIDZ? Hope it does not mean Striped.
I did some reading online and found a Unix command gpart. (in Shell) Was hoping that gpart would show the detached 1st volume. It’s detached as a volume but physically connected to my machine. gpart only showed the 2nd volume drives. Also saw something about Auto-Importing a detached volume however didn’t see this option in FreeNAS GUI. Either way 1 of the 3 drives in the 1st volume failed. Was hoping that inserting a new 2TB WD Red drive in place of the failed drive would reRAID onto the new drive.
Was also wondering if 2 of the 3 drives were RAIDZ if I can still pull files by attaching to another computer and using UNIX shell to copy files.
Hope this helps. If not please let me know if there’s any other info I can provide.
No, it means mirrored. That doesn’t bode very well if you had three disks and they weren’t a three-way mirror - but it’s hard to say without looking at the output of zpool status and/or zpool import.
