Re: copy large file to USB drive hangs
- From: flahmeshess <dingdongdingding@xxxxxxxxx>
- Date: Wed, 2 Apr 2008 08:09:22 -0700 (PDT)
I've tried it on a MiniSD with adapter. Same problem.
On Apr 2, 8:18 am, Frank Booth Snr <fb...@xxxxxxxxxxx> wrote:
flahmeshess wrote:
Probably not due to power supply. Happens to my other 3.5 inch IDE
HDD power by main. I think it's the USB not able to handle the
throughput. If I find ways and means to slow it down, eg lower the
priority of the copy command when run in a cmd shell and at the same
time set it's affinity to 1 CPU instead of 2, then it takes longer for
this problem to happen and sometimes not happen.
I also once did a copy at the same time I do an ActiveSync, it
happened in just a few minutes.
So now, I'm trying to get a copy program (C or Java) that I can
control the buffer size and sleep in between. Then at least I can
copy overnight without hanging. But I loose the ability to check for
duplicate files, recurse through directories (trying to use the global
utility to solve this), etc.
On Apr 1, 2:35 am, Frank Booth Snr <fb...@xxxxxxxxxxx> wrote:
flahmeshess wrote:
The HDD is a SATA drive enclosed in a casing with a USB connection to
the PC. The Connection is a Y connector which is able to draw power
from 2 USB output.
I've not personally used this type of arrangement with USB drives, but
it sounds like it's not able to draw enough power from the USB hubs,
which is why it suddenly stops during transfer. I think there lies your
problem. Just to be quite certain the drive works fine with your PC,
remove it from the caddy, open up your PC and connect it to the SATA
controller. Then try transferring your big files over to it. That should
work fine.
The only way I'd use an external USB HDD is to buy one built for the
purpose with external power supply, not an IDE or SATA enclosed in a
caddy, that uses a USB hub for power although as someone has said it's
the SATAs that tend to be more unreliable when used in this way.
I'd be interested to know if you got hold of a dedicated USB external
drive (ie no caddy) and tried to copy, whether you would get the same
problem. Have you tried using say a 2 GB flash drive and tried copying a
large file over and see whether that works ok? Anyway the fact that your
drive works on another PC points the finger at your USB output, and one
wonders whether your PSU is sufficiently adequate to cope with the
demands made by your system.
.
- References:
- Re: copy large file to USB drive hangs
- From: flahmeshess
- Re: copy large file to USB drive hangs
- From: Frank Booth Snr
- Re: copy large file to USB drive hangs
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