Re: HELP: External 250G USB screwed with GParted
- From: Lamar Owen <lowen@xxxxxxxx>
- Date: Tue, 22 Jan 2008 05:52:34 -0500
On Monday 21 January 2008, Craig White wrote:
On Mon, 2008-01-21 at 15:22 -0500, Lamar Owen wrote:
My own experience
trying to use another cable, one that was the same length but had been
supplied with a USB multi-card reader (SanDisk branded), indicated that
this was in fact true, as the PassPort did not spin up with the SanDisk
USB 2.0 cable, but would with the supplied WD cable.
----
the cable that they suggested not to use was a specific type of cable
that doesn't use normal shielding.
But thanks...you did find a cable that didn't work properly. What do you
suppose was the problem with the cable that didn't work properly?
Wire too small internally. The 80GB PassPort I have shipped with a cable that
has a single A plug on the computer side; most of the external USB drive's
I've seen have two (including my new Seagate FreeAgentGo 160GB that I'm using
now instead of the dead slow WD). All the USB 2.5 inch adapters that I'm
aware of are intelligent ones, and check the power capacity of the port prior
to spinning up the drive (the way to real data corruption is dropping power
while the drive is spinning up, which is exactly what would happen if the
cable's wire size is too small). This includes a couple of inexpensive 2.5
inch USB enclosures I bought a while back for data recovery purposes.
Also, I have a USB to ATA dongle adapter for data recovery purposes; you've
probably seen the kind I'm talking about, that has three interfaces on it:
3.5 inch PATA 40 pin connector; 2.5 inch PATA 44 pin connector, and a SATA
connector. it came with a power supply that powers most 3.5 inch PATA and
SATA drives (not all; in their wisdom, the power supply manufacturer didn't
provide both ground pins on the molded Molex drive connector; I have found a
few drives that won't spin up without both ground pins being present....).
The dongle can power a 2.5 inch drive without the external power supply;
unless the drive's power needs are too great, in which case the drive doesn't
even attempt to spin up. This is an aggravation; I had two 60GB drives, one
a 7200RPM unit, and one a 4200 RPM unit, made by the same manufacturer; the
4200RPM unit is spun by this dongle just fine, but the 7200RPM unit is not.
In fact, I bought the 2.5 inch enclosure I mentioned above because it had the
dual-A to single mini-B cable, and it powers the 7200RPM drive just fine.
--
Lamar Owen
www.pari.edu
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- References:
- HELP: External 250G USB screwed with GParted
- From: André Costa
- Re: HELP: External 250G USB screwed with GParted
- From: Craig White
- HELP: External 250G USB screwed with GParted
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