On Wed, Jul 22, 2015 at 3:17 PM, Håkon Alstadheim
<hakon@alstadheim.priv.no <mailto:hakon@alstadheim.priv.no>> wrote:
How long are your USB-cables? What kind of power supply do you
have, and what else is drawing power?
The USB cable the drive is currently on is fairly short - about 80cm
if I had to guess. The drive has its own wall-wart specced at 2A
(12V). There's nothing plugged into the USB ports that would draw
power (the only other device plugged in is a UPS).
I just went from a PSU specced at 5x the needed sustained power to
10x . Got a slight but definite improvement in USB stability. Yes,
my system is drawing ~ 150w from a 1200w supply. Externally
powered hubs were no help. 5v is specced at 30amps max. I still
get drop-outs , very rarely reqiuring hard boot now, except if I
try the multi-media-keys on my back-lit usb2.0 keyboard.
The host is powered by a 300W Fortron SFX PSU, which should be about
5-6x of actual power draw. It's plugged into the UPS so power should
be fairly stable... but you do bring up a good point, the PSU is one
element I hadn't considered. Might try to swap that out, too, when I
get a chance.
--
To UNSUBSCRIBE, email to debian-user-REQUEST@lists.debian.org
<mailto:debian-user-REQUEST@lists.debian.org>
with a subject of "unsubscribe". Trouble? Contact
listmaster@lists.debian.org <mailto:listmaster@lists.debian.org>
Archive:
https://lists.debian.org/FA2B0565-1DF4-4FBC-B280-8866B2083BA1@alstadheim.priv.no