[FreeNAS] data loss? help!

[al81]

Sorry for my English, I use Google Translator

Prehistory:
Was installed FreeNAS 0.7 on USB flash. Was connected to the drive and formatted as gpt. Everything worked perfectly. Was installed FreeNAS 8. Importing a disk, error appears. Now I can not remember the exact text of the error. Disk is not imported. After trying to mount a drive in FreeNAS 0.7 or FreeBAS 8.2 I have an error in the Web interface or command line.

mount-t ufs / dev/ad0p1 / mnt

mount: / dev/ad0p1: Invalid argument

When checking the disk I have:

fsck-t ufs / dev/ad0p1 
 ** / Dev/ad0p1 
 Cannot find file system superblock 
 ioctl (GCINFO): Inappropriate ioctl for device 
 fsck_ufs: / dev/ad0p1: can't read disk label

I'm trying to restore a file system; newfs -N and fsck_ufs -b do not work. I have an error:

  **** Is not a file system superblock

What to do how to recover data?

 

[wblock@]

Better asked on the FreeNAS forums. They know more about it than we do.

Why do you assume it's p1? A standard GPT setup could have p1 for freebsd-boot, with the data sections at p2 or higher. Use gpart(8) to see what's on there:
# gpart show ad0

 

[al81]

I found the solution: by looking for superblock scan_ff then fsck_ufs -b.

Now checked that it was possible to restore.