The outside metal part of the usb connector should be connected to the
negative power lead. I just tested on a Maxtor 3.5" external drive and
this proves to be the case. If you can get a ohm meter or continuity
tester lead into the power input and the other lead on the outside of
the usb plug, you should be able to easily determine which is positive
and which is negative.
If anyone can provide objection or support to this idea, please speak
up, since I am not an electrical expert by any means - I'd hate for my
information to be responsible for frying someone's hard drive. I fried
my laptop motherboard once with backwards polarity.. :/
Regards,
Justin
dhull wrote:
>I got an external usb 2.5" 40gig Seagate drive. Works well on my workstation. Can't use it on the laptop I have. If I watch /var/log/messages it says the drive is connected but I can't mount it. At the meeting last night we figured it's a power issue.
>
>I checked with the people at Friged North and they have a power supply that will work. However, the guy didn't want to sell it to me because he couldn't figure out the polarity. The only info on the drive is "5V DC" and "650mA".
>
>I searched google and found nothing. Looks like I'll have to call Seagate on monday.
>
>If anyone has suggestions I'll take them. I'd like to get this working as soon as possible.
>---------
>To unsubscribe, send email to <aklug-request@aklug.org>
>with 'unsubscribe' in the message body.
>
>
>
>
---------
To unsubscribe, send email to <aklug-request@aklug.org>
with 'unsubscribe' in the message body.
Received on Sat Apr 9 19:46:22 2005
This archive was generated by hypermail 2.1.8 : Sat Apr 09 2005 - 19:46:22 AKDT