[SOLVED] Rescue B2 Disk

Got problems with your B2 or B3? Share and get helped!
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PerN
Posts: 24
Joined: 20 May 2010, 15:07

[SOLVED] Rescue B2 Disk

Post by PerN » 02 Mar 2016, 08:59

Hiya,

I have a B2 and a B3.

The B2 will not boot, just blinks forever, not sure what caused it, I hadn't used it for a while.
There are stuff on the (1 TB) disk I'd really like to salvage.

I'm thinking in the lines of using a Linux PC (not that I have one yet, but I guess booting a Linux dist from USB would work) and connect the disk to the PC via USB and then FTP the files to the B3.

The question is : What do I need in order to be able to connect the disk to the PC?


Thanks
Last edited by PerN on 05 Mar 2016, 16:48, edited 1 time in total.

Binkem
Posts: 388
Joined: 10 Jul 2008, 02:26

Re: Rescue B2 Disk

Post by Binkem » 03 Mar 2016, 16:55

There are several options here:

You can try booting your B2 from a rescue USB. You can find the howto somewhere on the forum.
If you open up the PC you may just connect it to the PC using a sata cable and power cable
You may use an external case and then connect it using esata or USB cables the cases are fairly inexpensive and installing a hdd is less difficult than installing a HDD in a B2/B3.
Or you can buy a HDD docking station, where you only need to place the hdd into the cradle.
It may be that a faulty HDD is the reason why the b2 don't boot.

PerN
Posts: 24
Joined: 20 May 2010, 15:07

Re: Rescue B2 Disk

Post by PerN » 03 Mar 2016, 18:02

Thanks,

yeah, I've tried the USB Recovery thingie without success (just keeps blinking).

HDD docking station sounds like the easiest way forward.

sakaki
Posts: 170
Joined: 15 Aug 2014, 11:20

Re: Rescue B2 Disk

Post by sakaki » 04 Mar 2016, 03:13

Hi,

one other thing you could try is booting with the Gentoo live-USB for the B2. The image uses UUID-based disk naming, so should boot even if your internal HDD is no longer being recognized as /dev/sda on the B2. There is also a small 'blinktest' image (instructions here) that you can use to quickly check if your USB key will work correctly with your B2 (as not all brands do).

Best, sakaki

PerN
Posts: 24
Joined: 20 May 2010, 15:07

Re: Rescue B2 Disk

Post by PerN » 05 Mar 2016, 14:54

Hi thanks for the suggestions,

At first I got really really happy as using a HDD dock seemed to work fine. I could access the content and all looked fine.

But then I made the fatal (it seems) mistake of rebooting before retrieving the files in question (~90 GB) and now I can't access the HDD anymore.

When it tries to mount it i get
"Error mounting /dev/dm-0 at /media/ubuntu/Bubba home1: Command-line `mount -t "ext3" -o "uhelper=udisks2,nodev,nosuid" "/dev/dm-0" "/media/ubuntu/Bubba home1"' exited with non-zero exit status 32: mount: wrong fs type, bad option, bad superblock on /dev/mapper/bubba-storage,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so"

Code: Select all

ubuntu@ubuntu:~$ dmesg | tail
[  517.793788] blk_update_request: I/O error, dev sdc, sector 0
[  517.793875] JBD2: recovery failed
[  517.793881] EXT4-fs (dm-0): error loading journal
[  579.776685] scsi_io_completion: 63 callbacks suppressed
[  579.776695] sd 12:0:0:0: [sdc] FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  579.776699] sd 12:0:0:0: [sdc] Sense Key : Medium Error [current] 
[  579.776703] sd 12:0:0:0: [sdc] Add. Sense: Unrecovered read error
[  579.776707] sd 12:0:0:0: [sdc] CDB: Read(10) 28 00 01 2a 55 03 00 00 02 00
[  579.776710] blk_update_request: critical medium error, dev sdc, sector 19551491
[  579.776790] EXT4-fs (dm-0): unable to read superblock
ubuntu@ubuntu:~$ ^C
ubuntu@ubuntu:~$ 

Code: Select all

ubuntu@ubuntu:~$ sudo fsck.ext4 -v /dev/dm-0
e2fsck 1.42.9 (4-Feb-2014)
fsck.ext4: Attempt to read block from filesystem resulted in short read while trying to open /dev/dm-0
Could this be a zero-length partition?
ubuntu@ubuntu:~$ 
Any suggestions on how to prodceed? I can't believe I managed to destroy it by looking at it/rebooting.
I am sure the files/data are still there somewhere...

PerN
Posts: 24
Joined: 20 May 2010, 15:07

Re: Rescue B2 Disk

Post by PerN » 05 Mar 2016, 16:48

Data salvaged!

By using the TestDisk [1] app I managed to copy the files onto PC's disk without properly mounting the B2 drive.

[1] http://www.cgsecurity.org/wiki/TestDisk

Comel
Posts: 1
Joined: 04 Nov 2016, 04:04

Re: Rescue B2 Disk

Post by Comel » 05 Nov 2016, 03:50

PerN wrote:Data salvaged!

By using the TestDisk [1] app I managed to copy the files onto PC's disk without properly mounting the B2 drive.
Sweet, is there a tutorial or something somewhere showing how to do this step by step so I don't mess things up?

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