Using a USB external enclosure with a PATA hard drive ?

[Richard Shaw]

On Mon, Feb 1, 2010 at 1:08 PM, Jim <mickeyboa at sbcglobal.net> wrote:
> On 02/01/2010 01:43 PM, Richard Shaw wrote:
>> On Mon, Feb 1, 2010 at 11:48 AM, Jim<mickeyboa at sbcglobal.net>  wrote:
>>
>>> On 02/01/2010 11:58 AM, Richard Shaw wrote:
>>>
>>>> Others may have better advice, but you can try unplugging the drive
>>>> then as root do "tail -f /var/log/messages" and plug the drive back
>>>> in. It may give you some hints as to what's going on.
>>>>
>>>> Richard
>>>>
>>>>
>>> Thanks Richard.
>>>
>>>
>>> tail -f /var/log/messages ;
>>>
>>> localhost kernel: usb 2-3: new high speed USB device using ehci_hcd and
>>> address 6 localhost kernel: usb 2-3: New USB device found,
>>> idVendor=0c0b, idProduct=b157
>>> localhost kernel: usb 2-3: New USB device strings: Mfr=10, Product=11,
>>> SerialNumber=3
>>> localhost kernel: usb 2-3: Product: DMI USB2.0 Storage
>>> localhost kernel: usb 2-3: Manufacturer: DMI
>>> localhost kernel: usb 2-3: SerialNumber: 2009102609E0
>>> localhost kernel: usb 2-3: configuration #1 chosen from 1 choice
>>> localhost kernel: scsi10 : SCSI emulation for USB Mass Storage devices
>>> localhost kernel: usb 2-5: reset high speed USB device using ehci_hcd
>>> and address 4
>>> localhost kernel: scsi 10:0:0:0:
>>> Direct-Access                                    PQ: 0 ANSI: 2 CCS
>>> localhost kernel: sd 10:0:0:0: Attached scsi generic sg3 type 0
>>> localhost kernel: sd 10:0:0:0: [sdc] Attached SCSI disk
>>> localhost kernel: usb 2-5: reset high speed USB device using ehci_hcd
>>> and address 4
>>> localhost kernel: EXT3-fs: unable to read superblock
>>> localhost kernel: EXT3-fs (sdc): unable to read superblock
>>>
>> At least the drive is detected so that's good but I don't like the
>> last two lines...
>>
>>
>>> It is a ide drive with a ext3 fs on it.
>>> I tried to mount it.
>>>
>>>
>>> # mount -t ext3 /dev/sdc /mnt/harddrive
>>>
>> That's the first problem. /dev/sdc points to the drive, not a
>> partition. Assuming the drive only has one partition you should use:
>>
>> # mount -t ext3 /dev/sdc1 /mnt/harddrive
>>
>> But that's an assumption. You can try "ls -l /dev/sdc*" to get a list
>> of all partitions. Quick question, are you sure this drive is not
>> using logical volume management?
>>
>>
>>> Also tried a fdisk /dev/sdc;
>>>
>>> # fdisk /dev/sdc
>>>
>>> Unable to read /dev/sdc
>>>
>> That's troubling as well, maybe a permission issue?
>>
>> Richard
>>
> # mount -t ext3 /dev/sdc1 /mnt/harddrive
> mount: special device /dev/sdc1 does not exist
>
> # ls -l /dev/sdc*
> brw-rw----. 1 root disk 8, 32 2010-02-01 12:31 /dev/sdc
>
>
> This hard drive was a install of FC10 boot hard drive and it has a;
>
> /   partition
> /home   partition
>
> I do all my installs using those two partitions

Well, wish I could be more help but this is past my expertise. The
only thing I can think of is to check the drive for errors...

To check the status:

smartctl --attributes --log=selftest --quietmode=errorsonly /dev/sdc

To run a test:

smartctl --test=long /dev/sdc

I believe it is attribute 5 that shows remapped sectors. This should
ideally be 0 but a small number is sometimes acceptable.

Richard