Data Recovery

[csing]

Greetings,
First post to the group.....and as with most other N00bs...posted with abated desperation!

Using FreeNAS 8.3 and booting from a 4GB USB drive.
HW a Dell Poweredge 1950 dual processor 16GB RAM box with just 2 SCSI 149GB disks.

Attached are two screenshots, video too large to post.

The 2 Disks are in a RAID0 single volume returning "Not Ready" and boots me to the command prompt. It has been running flawlessly for over a year........ Backups are 3 months old.............

The error occurred following a kernel panic. I have only run fschk -y which cleared some file errors. Then I burned the 8.3 iso to a CD and this boots to the install/upgrade menu.

Question. What is the best way to determine if the data can be recovered?

Thanks,
Charles

 

[warri]

Did you use ZFS on top of a hardware RAID?

 

[csing]

I don't believe so. Sorry not very helpful. I did the liked it, installed it, forgot it.

I may have to put together another server and run through the install again to jog the memory.

Any suggestions on how I can get the disk to mount?

TIA

 

[cyberjock]

Can you install FreeNAS 9.2.0 on a new USB and then from the CLI do the following commands:

gpart list
dmesg
zpool import

 

[csing]

Attached are screenshots of the command outputs, named accordingly.

These were taken while booting in a new 9.2 usb drive. Will "zpool import -f shares" allow me to access the data?

Thanks,
Charles

 

[csing]

I want to clone my RAID0 drives in another machine. Which is the preferred linux distro that uses ddrescue to clone/image the drive?

Thanks!

 

[warri]

I haven't tried it myself, but System Rescue CD seems to contain ddrescue.
Also any Ubuntu Live CD should be fine, I think you can add packages like ddrescue with the package manager even on a live system.

 

[cyberjock]

Keep in mind if you do cloning of hardware RAID disks it won't work the way you are expecting. :(

 

[csing]

I was able to import the pool using -f and see all my data.
however after a reboot i have to run the import -f again.
zpool status reports status Online and "No known data errors"

Should I run a scrub or resilver before making a copy of the data?
Also none of the NAS services are running....I am still in single user mode.
What is the simplest way to get the data off? Manually start samba or mount usb drive?

Thanks

 

[cyberjock]

The "simplest" is whatever you are most comfortable with. There's no right or wrong answer.

If you are forced to do -f to get it to mount something is seriously wrong.

You should make a copy of your data before attempting any scrubs. You can't resilver as your vdev design doesn't have redundancy. Resilvering replace lost redundancy in a vdev.

 

[csing]

Thanks! I have been quite but made progress. Did as you suggested and upgraded to 9.2 and auto import of pool following that. Got all the data and then created ntfs share and copied it to a backup disk. boy that took time.

Found out that my config db was gone. So have created them again in 9.2. Here is my current problem....

CIFS is not working with my new config. I have carefully followed the anonoymous access instructions but my workstation cannot net view or map a drive to the samba share. I see there is a bug in 9.2 with anonymous access so not sure what works. I will post another problem with this.....I literally hate samba!!!!

 

[cyberjock]

ntfs share? You mean NFS share?

CIFS works flawlessly with me. What bug report in particular are you referring to? We get a large number of bug reports that are more related to people not knowing how to use FreeNAS/permissions/whatever than an actual bug.

 

[csing]

Sorry my previous post was incoherent... I was a little frustrated.
I was able to take a ntfs drive and mount it as a share on the freenas box using ntfs-3g command. Copied my data to this share and provided that ntfs disk for temporary file retrieval until I was able to whip FreeNAS into shape. :

I created a CIFS share using anonymous but this allowed me to read but not delete files. I changed guest to nobody and samba to User from anonymous and now it works fine.

My final problem is that some Window7 machine cannot see the network share!!!!! I have one Win7 and XP box that sees the shares fine and 2 win7 boxes that see nothing. Very frustrating...

Any ideas. I have turned on debug logging on the share but need to find the log files...to post the error.

Charles