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3 drives Unmountable

Homerr

By Homerr
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I suddenly had 3 drives show up as Unmountable in August.  I had a bunch of home renovation stuff I've been working on that was a priority and I pretty much ended up just turning the server off until now.

 

Here is my best recollection of the series of events, some of which may not be factors.

 

1.  Up to July I was running an Intel i3 based setup with 19 drives in a Norco RPC-4020.   Parity checks were taking 36+ hours with the number of drives and I noticed CPU usage was high.  In an attempt to speed things up I bought a new mobo/cpu, Ryzen 5 3600, as soon as they were released.  This upgrade seemed to go smooth and ran for a couple of weeks fine.

2.  I was running a pair of Supermicro AOC-SASLP-MV8 cards and I wondered if I could increase performance by replacing these with a single HBA in the 16x PCIE slot instead of using the second one in the 4x (electrical) slot on the mobo (as on boot the AOC-SASLP-MV8 showed one card at 8x and the second at 4x).  I ordered a LSI 9201-16i card.

3.  Installed the LSI card and it ran fine for a couple of days.  I did notice that transfers were VERY slow in the KB/s range instead of MB/s range.

4.  After a few days I was rebooting for some reason and I had one drive missing (iirc this was Disk 8, a newish 10tb WD).  I rebooted again and Disks 11 and 14 were showing missing.  Powered down and moved the missing drives around to try to reseat them in the Norco case.  One that was missing completely now showed up with a green dot before starting the array (Disk 11).  I powered down and rechecked all the SATA connections to the backplanes and SAS to HBA connectors.  Booted back up and Disk 8 and 14 are missing, start the array and it shows as the attached pic.

5.  As a troubleshooting thing I ordered new breakout cables and installed them.  No change.

6.  I pulled the LSI card and went back to the pair of Supermicro cards.  No change.

7.  Powered down. 

8.  I've booted it a few times to copy many TB at a time to a few more Easystore externals that I have gotten since this all happened.  If it started the Mover it would just start spamming errors while this was going on so I disabled Mover.  (I do have Crashplan as a backup for a relatively smaller amount of family photos, etc.  I now have most of the server backed up locally on these external drives now.  But I don't 100% know what I'm missing on the non-emulated drive.)

 

I think the big questions are:

1.  The 3 drives in question are all newer and to have them go out suddenly on 2 reboots seems like they are not bad themselves, more a glitch that they are Unmountable.  Can they be repaired and put back in the array?  All 3 of them?

2.  If not repairable I'e like to see what files are on each disk so I can know what to re-rip/record since I don't even really know what I'm missing.  Is this possible? 

 

Diagnostics zip attached.

 

 

unraid-diagnostics-20191109-1647.zip

UNRAID.jpeg

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On 11/9/2019 at 12:14 PM, itimpi said:

You should put the array into Maintenance mode and then click on each problem drive in turn to run a file system check.    If corruption is reported and a suggested way of fixing this corruption (by at the least removing the -n flag) then carry out the suggested repair action.

Thanks for posting this.  I ran it on one drive and came back with this.  There is no suggested way that I understand here, so just remove the -n flang and rerun? 

Phase 1 - find and verify superblock...
bad primary superblock - bad CRC in superblock !!!

attempting to find secondary superblock...
..found candidate secondary superblock...
unable to verify superblock, continuing...
.found candidate secondary superblock...
unable to verify superblock, continuing...
..............found candidate secondary superblock...
unable to verify superblock, continuing...
..found candidate secondary superblock...
unable to verify superblock, continuing...
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candidate secondary superblock...
unable to verify superblock, continuing...
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.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................Sorry, could not find valid secondary superblock
Exiting now.

 

Link to comment
Homerr Rookie

Homerr

Posted
  • Author
Posted (edited)

The above was for Disk 8.  After it finished I ran it without the -n flag and it seems it wasn't able to repair it.

 

Disk 11 found something quickly and finished in a few minutes with the -n present: 


Phase 1 - find and verify superblock...
bad primary superblock - bad CRC in superblock !!!

attempting to find secondary superblock...
.found candidate secondary superblock...
verified secondary superblock...
would write modified primary superblock
Primary superblock would have been modified.
Cannot proceed further in no_modify mode.
Exiting now.

Running without the -n flag is this on Disk 11: 


Phase 1 - find and verify superblock...
bad primary superblock - bad CRC in superblock !!!

attempting to find secondary superblock...
.found candidate secondary superblock...
verified secondary superblock...
writing modified primary superblock
sb root inode value 18446744073709551615 (NULLFSINO) inconsistent with calculated value 128
resetting superblock root inode pointer to 128
sb realtime bitmap inode 18446744073709551615 (NULLFSINO) inconsistent with calculated value 129
resetting superblock realtime bitmap ino pointer to 129
sb realtime summary inode 18446744073709551615 (NULLFSINO) inconsistent with calculated value 130
resetting superblock realtime summary ino pointer to 130
Phase 2 - using internal log
        - zero log...
ERROR: The filesystem has valuable metadata changes in a log which needs to
be replayed.  Mount the filesystem to replay the log, and unmount it before
re-running xfs_repair.  If you are unable to mount the filesystem, then use
the -L option to destroy the log and attempt a repair.
Note that destroying the log may cause corruption -- please attempt a mount
of the filesystem before doing this.

 

Disk 14 has a veeeeerrryy long log, I'm truncating 99% of it: 

Phase 1 - find and verify superblock...
bad primary superblock - bad CRC in superblock !!!

attempting to find secondary superblock...
.found candidate secondary superblock...
verified secondary superblock...
writing modified primary superblock
sb root inode value 18446744073709551615 (NULLFSINO) inconsistent with calculated value 128
resetting superblock root inode pointer to 128
sb realtime bitmap inode 18446744073709551615 (NULLFSINO) inconsistent with calculated value 129
resetting superblock realtime bitmap ino pointer to 129
sb realtime summary inode 18446744073709551615 (NULLFSINO) inconsistent with calculated value 130
resetting superblock realtime summary ino pointer to 130
Phase 2 - using internal log
        - zero log...
        - scan filesystem freespace and inode maps...
Metadata CRC error detected at 0x439356, xfs_agf block 0x7ffffff9/0x200
Metadata CRC error detected at 0x439356, xfs_agf block 0xfffffff1/0x200
Metadata CRC error detected at 0x439356, xfs_agf block 0x1/0x200
Metadata CRC error detected at 0x463086, xfs_agi block 0x7ffffffa/0x200Metadata CRC error detected at 0x463086, xfs_agi block 0xfffffff2/0x200

Metadata CRC error detected at 0x463086, xfs_agi block 0x2/0x200
Metadata CRC error detected at 0x439356, xfs_agf block 0x17fffffe9/0x200
Metadata CRC error detected at 0x463086, xfs_agi block 0x17fffffea/0x200
Metadata CRC error detected at 0x439356, xfs_agf block 0x1ffffffe1/0x200
Metadata CRC error detected at 0x463086, xfs_agi block 0x1ffffffe2/0x200
Metadata CRC error detected at 0x439356, xfs_agf block 0x27fffffd9/0x200
Metadata CRC error detected at 0x463086, xfs_agi block 0x27fffffda/0x200
(...TRUNKATING THIS LONG LOG...)
disconnected inode 164, moving to lost+found
Phase 7 - verify and correct link counts...
resetting inode 131 nlinks from 2 to 3
resetting inode 132 nlinks from 3 to 2
Note - stripe unit (0) and width (0) were copied from a backup superblock.
Please reset with mount -o sunit=,swidth= if necessary
Maximum metadata LSN (1:13140205) is ahead of log (1:135479).
Format log to cycle 4.
done

I did stop maintenance mode and started the array.  The attached pic shows that Disk 14 seems to have made progress.  I clicked on the folder on the right side to see what is there and inside the Lost+Found folder I took a screenshot.

 

Can anyone help me with next steps?

 

Disk 8:  I don't know what to do here.

Disk 11:  Per the quote above I mounted the file system, I'll re-run the repair without -n in Maintenance mode.

Disk 14:  It says to "Please reset with mount -o sunit=,swidth= if necessary".  This was also there when I went in to regular mode with the array.  Do I rerun the repair here now while I'm in Maintenance mode?

 

 

unraid 2.JPG

unraid3.JPG

Edited by Homerr
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itimpi Grand Master

itimpi

Posted
Posted

Sorting out the contents of a lost+found folder can be hard work so one has to decide if it is worth the effort :( 

 

Folders are normally relatively easy as the contents give you an idea of what the folder name should be.

Files are much harder once the original name is lost and you have the cryptic ones from the recovery process.   If you want to have a go at this then the Linux 'files' command can be useful to quickly determine what type of content is in each file

 

Regarding the message about disk11, the need for the -L flag is quite normal.  Despite the ominous sounding warning it virtually never results in data loss and even when it does it only affects the last file(s) being written.

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Homerr Rookie

Homerr

Posted
  • Author
Posted

Welp, I ran the -L flag on Disk 11 and it returned this (I'm trunkating a bunch).  I started the array in normal mode then Disk 11 is  present like a freshly formatted blank drive.  So it seems like that 10tb is toast.  At this point I'm feeling like the other 10tb and 8tb drives are going to end up the same way. 

Phase 1 - find and verify superblock...
Phase 2 - using internal log
        - zero log...
        - scan filesystem freespace and inode maps...
Metadata CRC error detected at 0x439356, xfs_agf block 0x27fffffd9/0x200
Metadata CRC error detected at 0x463086, xfs_agi block 0x27fffffda/0x200
(TRUNKATING THIS POST)
Metadata CRC error detected at 0x43cc6d, xfs_allocbt block 0x2ffffffe0/0x1000
btree block 6/2 is suspect, error -74
agf_freeblks 268435429, counted 268435225 in ag 6
agf_longest 268435446, counted 268435225 in ag 6
Metadata CRC error detected at 0x46a06d, xfs_inobt block 0x2ffffffe8/0x1000
(TRUNKATING THIS POST)
invalid start block 0 in record 101 of cnt btree block 9/2
invalid start block 0 in record 102 of cnt btree block 9/2
invalid start block 0 in record 109 of cnt btree block 9/2
invalid start block 0 in record 110 of cnt btree block 9/2
(TRUNKATING THIS POST)
Bad ctime nsec 4048716988 on inode 128, resetting to zero
entry "                                                                _&%�H/�?" in shortform directory 128 references invalid inode 0
entry contains illegal character in shortform dir 128
junking entry "_&%�H/�?" in directory inode 128
entry "" in shortform directory 128 references invalid inode 0
entry #0 is zero length in shortform dir 128, junking 254 entries
corrected entry count in directory 128, was 207, now 0
corrected i8 count in directory 128, was 145, now 1
corrected directory 128 size, was 94, now 10
(TRUNKATING THIS POST)
        - agno = 9
        - process newly discovered inodes...
Phase 4 - check for duplicate blocks...
        - setting up duplicate extent list...
        - check for inodes claiming duplicate blocks...
        - agno = 1
        - agno = 5
        - agno = 9
        - agno = 2
        - agno = 3
        - agno = 4
        - agno = 6
        - agno = 7
        - agno = 0
        - agno = 8
corrected i8 count in directory 128, was 1, now 0
corrected directory 128 size, was 10, now 6
corrected root directory 128 .. entry, was 0, now 128
Phase 5 - rebuild AG headers and trees...
        - reset superblock...
Phase 6 - check inode connectivity...
reinitializing root directory
        - resetting contents of realtime bitmap and summary inodes
        - traversing filesystem ...
        - traversal finished ...
        - moving disconnected inodes to lost+found ...
Phase 7 - verify and correct link counts...
Maximum metadata LSN (1:229) is ahead of log (1:2).
Format log to cycle 4.
done

 

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