A little more information than in the title: I'm planning to move my unraid system over to a new N5105 board in a smaller case for the new year, and in doing so i'd need to pare down the number of drives so I ordered a couple renewed HGST He8s to help condense my array.

My plan was as follows:

• [x] Replace 2TB parity with a renewed 8TB drive
• [x] Add the old parity drive to the array as an XFS disk
• [x] Move the data from one of the reiser disk over to the newer disk while I waited for my second He8 to arrive.
• [_] Rebuild the parity so I can remove the old reiser disk and replace it with the second He8
• [_] Move the data from the other two reiser disks onto the new big disk

 

Something went wrong after I ran the unBalance operation, and now unraid doesn't recognize the file system on either of the disks I was messing with. I chose to use a move script instead of copy, which in hindsight I think would have worked better, because I would still have the reiser disk intact. I've run a couple xfs_repair commands through the GUI, with no luck

Phase 1 - find and verify superblock...
bad primary superblock - bad magic number !!!

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...
.><..Sorry, could not find valid secondary superblock
Exiting now.

So at this point, it seems I just have to write off the data as unrecoverable. It wasn't anything more important than linux distros or anything, so I'm not too hot about it, but if there's something that I, as a perpetual linux newb could do to recover the data I'm willing to try a bit more. 

tower-diagnostics-20231216-1545.zip

How are you doing check filesystem? Easy to get the command wrong, better to use the webUI.

 

Also, just in case you weren't aware:

 

 

I'm indeed using the WebUI, without tags, but Frank1940's post is new to me. I'll read through that because I didn't know the info from SSD's post had been preserved elsewhere

55 minutes ago, Mistaken4Bacon said:

either of the disks I was messing with

Which disks?

(sdf) was the largest old reiser disk that I started the process with. I ran an unBalance command from there to (sdh), the older parity disk that I formatted to xfs after replacing it with (sde - not involved in this transfer) 

I still have to finish reading @Frank1940's recommended mirror method, but of relevance, I did turn off docker and the mover script so I didn't have anything else writing to the array at the time. I did make note of this line from his post:

 

Note: the swap drive should not be formatted with XFS (the resultant file system); if it is, then you will need to clear it or format it to something else first

 

I did format sdh to xfs prior to running unBalance, however his procedure lists formatting the swap disk (sdh) to xfs just before running rsync -avPX. My unBalance command was a series of 

rsync -avPR -X "data/media" "/mnt/disk6/"

rather than running the command on the entire volume

 

 

1 minute ago, Mistaken4Bacon said:

(sdf) was ...

Not always useful to describe disks by the sd designation. That can change on reboot or disconnections or replacements.

 

When talking about assigned disks, better to call them by their assignment, such as Disk 1.

 

Also some unique part of serial number, often last 4 characters, can be used.

gotcha, in this case after running unbalance to move all data from disk3 to disk6, I ended up with both disks reporting a file system error

 

Also, I should mention that I started the array and stopped the parity sync after I saw that disk6 was being reported as unmountable

Edited December 16, 20232 yr by Mistaken4Bacon

The point of the link I gave earlier is already a warning for you in your syslog:

Dec 11 21:08:47 Tower kernel: REISERFS warning:  read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025

And Fix Common Problems has been warning your about that too.

 

Your diagnostics are without the array started in normal mode, so not immediately obvious which disks are unmountable. After doing some more work studying syslog, from entries Dec 15 16:06:02, it looks like disks 1,2 were mounting ReiserFS, disk3 was missing, disks 4,5 were mounting XFS, disk6 was unmountable but assumed to be XFS according to its settings (system/vars.txt). Vars also thinks disk3 is supposed to be XFS.

 

Does that seem to be right? Where is disk3? Is that the unassigned Hitachi serial ending KMLE? That seems to agree with earlier syslog entries.

 

 

But disk3 was mounting as ReiserFS in earlier syslog entries.

 Yes, you're reading that right. All 3 hitachi drives have been reiser from the time they were installed in my system years ago, this week was the point when I started doing something about it.

 

Digging in syslog, it looks like this is the point where I begain the preclear disk operation, and still had HNJQ as my parity disk:
 

Dec 12 18:48:54 Tower kernel: md: import disk0: (sdh) ST2000DL003-9VT166_5YD3HNJQ size: 1953514552 
...
Dec 13 00:58:31 Tower unassigned.devices: Partition '/dev/sde1' does not have a file system and cannot be mounted.
...
Dec 13 15:36:45 Tower kernel: md: import disk0: (sde) HUH728080ALE601_VKJXZ7EX size: 7814026532 erased

Looks like I rebuild the parity to Z7EX between these timestamps and it's available here:

Dec 14 11:17:01 Tower kernel: mdcmd (1): import 0 sde 64 7814026532 0 HUH728080ALE601_VKJXZ7EX

So shortly after this point I would have added HNJQ as disk6 and formatted to XFS

Dec 14 11:27:45 Tower emhttpd: mounting /mnt/disk3
Dec 14 11:27:45 Tower emhttpd: shcmd (75771): mkdir -p /mnt/disk3
Dec 14 11:27:45 Tower emhttpd: shcmd (75772): mount -t reiserfs -o noatime,user_xattr,acl /dev/md3p1 /mnt/disk3
Dec 14 11:27:45 Tower kernel: REISERFS warning:  read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025
...
Dec 14 17:54:59 Tower emhttpd: mounting /mnt/disk6
Dec 14 17:54:59 Tower emhttpd: shcmd (75871): mkdir -p /mnt/disk6
Dec 14 17:54:59 Tower emhttpd: shcmd (75872): mount -t xfs -o noatime,nouuid /dev/md6p1 /mnt/disk6
Dec 14 17:54:59 Tower kernel: XFS (md6p1): Mounting V5 Filesystem
Dec 14 17:54:59 Tower kernel: XFS (md6p1): Ending clean mount
Dec 14 17:54:59 Tower emhttpd: shcmd (75873): xfs_growfs /mnt/disk6

Then here it looks like the point after I've moved the contents of disk3 to disk6, and formatted disk3 to xfs at which point:

Dec 15 14:54:57 Tower emhttpd: mounting /mnt/disk3
Dec 15 14:54:57 Tower emhttpd: shcmd (76626): mkdir -p /mnt/disk3
Dec 15 14:54:57 Tower emhttpd: shcmd (76627): mount -t xfs -o noatime,nouuid /dev/md3p1 /mnt/disk3
Dec 15 14:54:57 Tower kernel: XFS (md3p1): Invalid superblock magic number
Dec 15 14:54:57 Tower root: mount: /mnt/disk3: wrong fs type, bad option, bad superblock on /dev/md3p1, missing codepage or helper program, or other error.
Dec 15 14:54:57 Tower root:        dmesg(1) may have more information after failed mount system call.
...
Dec 15 14:54:58 Tower emhttpd: mounting /mnt/disk6
Dec 15 14:54:58 Tower emhttpd: shcmd (76635): mkdir -p /mnt/disk6
Dec 15 14:54:58 Tower emhttpd: shcmd (76636): mount -t xfs -o noatime,nouuid /dev/md6p1 /mnt/disk6
Dec 15 14:54:58 Tower kernel: XFS (md6p1): Invalid superblock magic number
Dec 15 14:54:58 Tower root: mount: /mnt/disk6: wrong fs type, bad option, bad superblock on /dev/md6p1, missing codepage or helper program, or other error.
Dec 15 14:54:58 Tower root:        dmesg(1) may have more information after failed mount system call.

 

And I'm fairly lost as to where to find the other breadcrumbs because I don't see the unBalance commands, or would those be logged in a separate file?

Click on Tools, then New Config, then Retain current configuration: (from version 6.6 onwards it's Preserve current assignments), 
then select All, then check Yes I want to do this, click Apply then Done

Important Warning! Doing a New Config will reset the file system type for all disks to Auto! While usually this is not a problem,
especially with the latest unRAID, in some circumstances this can lead to unmountable disk(s). If that happens,
then you need to select the correct file system for those disk(s). If in doubt, ask for help!

Okay, going back to finish reading Frank1940's post: this seems to be where I went wrong. Can I do another New Config, telling unraid what file system the disks ought to be or am I misunderstanding/am I SOL?

Edited December 17, 20232 yr by Mistaken4Bacon

Is disk3 still unassigned?

It is currently unassigned. I have either been in maintenance mode or safe mode with the array stopped since it first reported disk3 and disk6 as unmountable, but disk6 has been assigned, and that's where the data is.

Start the array in normal mode with disk3 still unassigned then post new diagnostics so I can see if emulated disk3 is mountable.

4 minutes ago, trurl said:

Start the array in normal mode with disk3 still unassigned then post new diagnostics so I can see if emulated disk3 is mountable.

Do I need to unassign disk6 in this case?

This is the only configuration in which I'm given an option to start the array - without disk3. Is this a result a being in safe mode? If I assign disk3, whether or not I have disk6 assigned, it gives me 

Stopped. Invalid expansion.You may not add new disk(s) and also remove existing disk(s).

 

1 hour ago, Mistaken4Bacon said:

Do I need to unassign disk6 in this case?

Since you only have single parity you cannot start the array with 2 missing disks.

 

1 hour ago, trurl said:

Start the array in normal mode with disk3 still unassigned then post new diagnostics so I can see if emulated disk3 is mountable.

 

My mistake, it's been a long day  tower-diagnostics-20231217-0021.zip

Edited December 17, 20232 yr by Mistaken4Bacon

Parity is invalid, so disk6 cannot be emulated, you can run xfs_repair on the unassigned disk6 using UD.

I guess I overlooked the fact that you did New Config with nothing assigned as disk3, so it was no longer considered a missing disk.

That's not your fault. I neglected to mention I was trying to follow spaceinvader one's guide to shrink the array. I don't know if I missed a step, or if that just shouldn't have been an option in my case, where I need to convert the RFS volumes before doing anything else.

If there's nothing I can do to recover the data, it's not a tragedy, but what is the best course of action going forward? xfs_repair still hasn't given me a good result

Assuming sdf was disk3 post the output of:

 

xfs_repair -v /dev/sdf1

 

Running that command on unassigned disk3, I didn't get much more than 

..............................Sorry, could not find valid                                               secondary superblock
Exiting now.

either through the webUI's cli, or PuTTY, and it seems like both of those terminal windows cut off the beginning of the log

 

Running the command throught he webUI on disk6, I still get the same result as in the OP:

 

Phase 1 - find and verify superblock...
bad primary superblock - bad magic number !!!

attempting to find secondary superblock...
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could not find valid secondary superblock
Exiting now.

 

So looks like those filesystems are gone, possibly a file recovery app like UFS explorer may still be able to recover the data.

At this point I don't care to recover the data, it's just distros I've forgotten about and can download again if I care to do so. With that in mind, is my best course of action to let parity sync run to completion? I'll follow the Frank1940 RFS conversion procedure to the letter from that point on and post a new topic if I don't understand something, hopefully before I irrevocably lose data again.