Re: Cannot mount 2.5" drive in USB 2.0 case!!
- From: "Patrick Keenan" <test@xxxxxxxx>
- Date: Wed, 20 Jul 2005 20:44:09 -0400
"Nell" <Nell@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:CE6AEFA4-9672-47E2-89F6-74F756FD83AB@xxxxxxxxxxxxxxxx
>
>
> "StephenB" wrote:
>
>> "Nell" <Nell@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>>
>> >Hi Stephen, thanks for the reply. The disk was perviously formatted and
>> >partitioned. It is basically form a Toshiba laptop running XP Home
>> >(FAT32).
>> >The only partition is the system partition. When the drive is in the
>> >laptop I
>> >keep getting a BSOD on boot, I think on the kernal load or
>> >initialization
>> >sequence, just before login. I can only boot into safe (have tried all
>> >options). What i wanted to do was attach the drive to another system and
>> >backup the whole disk. Hence the usb IDE interface case. However, XP on
>> >the
>> >computer that I have attached the disk to is not recognising the
>> >existing
>> >partition for some reason, just the disk.
>>
>> Ah, okay. In the original laptop, is the drive functioning correctly or
>> is this
>> where only Safe Mode works? When in the USB case, is the USB case powered
>> externally or from the USB port? If the latter, see if applying power via
>> an AC
>> adapter helps. I have a 2.5 inch case that needs to be powered via
>> adapter on
>> some PCs in order to be recognized and works fine just from USB on
>> others.
>> -steve
>> --
>> Stephen Boots
>> MVP MSN.COM
>> sboots@xxxxxxxx
>>
> drive functions fine in laptop, can only boot into safe mode though. The
> usb
> case is powered by default from the usb port, however there is a power
> input
> on the case that you can attach to another usb port to increase the power.
> Have attached power, still no change.
>
> Nell
I use R-Tools software to recover data from disks like this. It works
well, but can take hours to run for each pass.
http://www.r-tt.com/
Download the demo version that's appropriate, install it and run it against
the drive in question. This will show you what is on it and what can be
recovered. If you think you'll get the upgrade to the full-working
version, be sure to save the log results from the demo so that you don't
have to re-scan the drive.
This software can work extremely well but is not fast. If you think
there's a thermal component to the disk problem, it's not a bad idea to put
a tea towel over the drive case and put a cold-pack on that.
Incidentally, I have no luck at all running laptop drives from unpowered USB
cases, because they draw more power than any USB port I have. All the
ports I have, including a powered hub, top out at 500 mA. The laptop
drives I have draw 1000 mA.
Most USB cases don't come with adapters though they have power jacks "in
case". I had to find a 5v 1000mA+ adapter and an appropriate DC power jack
and assemble it, taking care to heed polarity.
If I plug an unpowered drive case in to a USB port on my desktop systems,
the disk will be recognised but nothing on it will be. I have to power
down the external powered hub, sometimes move it to another USB port, and
plug it back in again. Sometimes it's necessary to power cycle the system.
If I do this on my Thinkpad, the Thinkpad will crash and I'll have to power
off, remove the battery and the AC adapter, hold the power switch for 30
seconds or so, then power back up to recover. If I use the power adapter
for the USB case, there's no problem.
So, consider that you may simply have run into a limit of the USB port and
not have noticed that the port cannot respond properly. Try another port
you are sure works and power up the drive case *before* connecting the USB
cable. Be sure that the power light comes on on the drive case.
HTH
-pk
.
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