Can't mount ZFS volume

[Ganesan]

I had setup a NAS server with FreeNAS-8.3.0-RELEASE-p1-x64 (r12825) for personal data few years back and it was working great until one day, I got this message from scrub report.
cannot open 'vol01': no such pool

I noticed unknown or unavailable ZFS volume status in WebGUI and detached it and I can't mount it back on. I don't see ZFS filesystem type in "Import Volume". I am not sure how to get the volume back and recover the data. Any help is greatly appreciated.

[root@homenas ~]# camcontrol devlist
<ST3000DM001-1CH166 CC43> at scbus0 target 0 lun 0 (pass0,ada0)
<WDC WD30EZRX-00MMMB0 80.00A80> at scbus1 target 0 lun 0 (pass1,ada1)
<Generic USB Flash Disk 7.76> at scbus4 target 0 lun 0 (pass2,da0)
<Generic Autorun Disk 8.00> at scbus4 target 0 lun 1 (pass3,da1)
[root@homenas ~]# ls /data/zfs/
zpool.cache
[root@homenas ~]#

 

[cyberjock]

Can you post the output of "zpool import" on pastebin? Pastebin works well because it doesn't trash the formatting of the text, which is very important.

 

[Ganesan]

Sorry about the format. I'm newbie to this forum. I guess I got the format right this time. Thanks for looking into my problem...

Code:

 
    [root@homenas ~]# camcontrol devlist                                       
    <ST3000DM001-1CH166 CC43>          at scbus0 target 0 lun 0 (pass0,ada0)     
    <WDC WD30EZRX-00MMMB0 80.00A80>    at scbus1 target 0 lun 0 (pass1,ada1)     
    <Generic USB Flash Disk 7.76>      at scbus4 target 0 lun 0 (pass2,da0)     
    <Generic Autorun Disk 8.00>        at scbus4 target 0 lun 1 (pass3,da1)     
    [root@homenas ~]# ls -l /data/zfs/                                         
    total 4                                                                     
    -rw-r--r--  1 root  wheel  1676 Apr  3 21:17 zpool.cache                     
    [root@homenas ~]# zpool import                                             
    Segmentation fault: 11                                                       
    [root@homenas ~]#

 

[cyberjock]

So either you have bad RAM, or you have no chance of ever seeing your pool again. (or your problem is extremely obscure)

So while you go do a RAM test with memtestx86 post your hardware....

 

[Ganesan]

Thanks. I will try memtest. Here is my hardware details:
AMD A8-3850 Llano 2.9GHz Socket FM1 100W Quad-Core Desktop APU (CPU + GPU) with DirectX 11 Graphic AMD Radeon HD 6550D AD3850WNGXBOX
BIOSTAR A75MG FM1 AMD A75 (Hudson D3) SATA 6Gb/s USB 3.0 Micro ATX AMD Motherboard
G.SKILL Value Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Desktop Memory Model F3-10600CL9D-8GBNT
1x Western Digital Caviar Green 3TB SATA hard drive
1x Seagate Barracuda STBD3000100 3TB SATA hard drive

 

[cyberjock]

Ug.... hardware that's not recommended in the slightest. :(

Well, let the RAM test run overnight and see if it find anything after 3 passes. If it does, you'll know. It will have red lines on your screen.

 

[Ganesan]

RAMs look good. no errors found 20+ passes in 48+ hours.
what is not recommended in the hardware list? Is it the hard drives or everything?
It was a 2x3TB hard disks with mirroring option. Is there anyway to recover the data from one of the two hard drives?

 

[cyberjock]

The motherboard, the CPU, the RAM. Overall it's just not a well built system.