Trouble with a USB hard drive

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Arancaytar
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Trouble with a USB hard drive

Postby Arancaytar » Mon Jul 28, 2014 11:10 pm UTC

I've got this 3.5" externally powered USB drive that I've been told got accidentally formatted (single NTFS partition, relatively new and unused, should be straightforward) but no physical problems, and trying to see if I can recover something.

Unfortunately, I've been unable to read anything from the device file. It's attached and shows up both in lsusb and as a block device (/dev/sdc), but attempting cat, dd, head, etc. will simply block the tty for a lengthy time and then time out.

I have this dmesg output:

Code: Select all

[   10.251983] sd 6:0:0:0: [sdc] Spinning up disk...
[   13.274648] .......
[  118.300496] sd 6:0:0:0: [sdc] READ CAPACITY failed
[  118.300506] sd 6:0:0:0: [sdc] 
[  118.300511] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  118.300515] sd 6:0:0:0: [sdc] 
[  118.300518] Sense Key : Not Ready [current]
[  118.300522] sd 6:0:0:0: [sdc] 
[  118.300526] Add. Sense: Logical unit is in process of becoming ready
[  120.324107] sd 6:0:0:0: [sdc] Test WP failed, assume Write Enabled
[  122.347706] sd 6:0:0:0: [sdc] Asking for cache data failed
[  122.347717] sd 6:0:0:0: [sdc] Assuming drive cache: write through
[  131.452430] sd 6:0:0:0: [sdc] Spinning up disk...
[  136.501269] ...............not responding...
[  244.589443] sd 6:0:0:0: [sdc] READ CAPACITY failed
[  244.589450] sd 6:0:0:0: [sdc] 
[  244.589454] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  244.589458] sd 6:0:0:0: [sdc] 
[  244.589460] Sense Key : Not Ready [current]
[  244.589465] sd 6:0:0:0: [sdc] 
[  244.589468] Add. Sense: Logical unit is in process of becoming ready
[  246.613044] sd 6:0:0:0: [sdc] Test WP failed, assume Write Enabled
[  248.636648] sd 6:0:0:0: [sdc] Asking for cache data failed
[  248.636654] sd 6:0:0:0: [sdc] Assuming drive cache: write through
[  248.636659] sd 6:0:0:0: [sdc] Attached SCSI disk


Is the drive actually broken? Maybe it's a problem with the power supply? I'm stumped, because nothing of what I've been told about this drive explains why the block device should be unreadable.

Edit: Currently the device doesn't block the terminal on reading, and just shows up as empty.

Edit 2: It's quite possible this is more suited for the Help Desk forum. If that is the case, please move this thread.
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wumpus
Posts: 546
Joined: Thu Feb 21, 2008 12:16 am UTC

Re: Trouble with a USB hard drive

Postby wumpus » Sun Aug 03, 2014 2:58 pm UTC

Nearly the first rule of troubleshooting is "divide and conquer" (the first is don't work with voltage you aren't prepared for).

Do you have a handy desktop? Have you tried taking the drive out of the container and reading it directly? If you only have a notebook, is it a 2.5" drive, and will it work with the notebook (SATA/PATA etc.)? Even if it isn't a boot drive, you could stuff it into a computer and boot a live linux OS on USB/optical. If you have a known working container with the same interface, you could try that.

The results you are posting look like the drive and not the USB container, but I'd recommend at least narrowing the result.

bobmon
Posts: 4
Joined: Mon Aug 11, 2014 2:40 pm UTC

Re: Trouble with a USB hard drive

Postby bobmon » Mon Aug 11, 2014 2:54 pm UTC

Do you know it's been partitioned as NTFS? "sudo fdisk -l" would tell you that.


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