USB external hard drive disconnecting
Reid Rivenburgh
reidr at pobox.com
Sat Feb 9 03:34:38 UTC 2008
On Feb 5, 2008 9:43 PM, Reid Rivenburgh <reidr at pobox.com> wrote:
> On Feb 5, 2008 5:07 PM, Reid Rivenburgh <reidr at pobox.com> wrote:
> > True enough! Another person privately mailed me, suggesting I run
> > sdparm periodically to prevent the drive from going asleep. Before
> > trying that, though, I'm just using the new USB cable. It's been okay
> > for several hours now, so maybe that was indeed the problem. I will
> > keep an eye on things and followup here with what I think is the final
> > verdict in a day or two.
>
> For those following my saga: Something just went wrong again. I got a
> bunch of "rejecting I/O to dead device" messages, as well as a lot of
> "new high speed USB device using ehci_hcd and address 65" (the number
> varies). It's unusual this time in that it's not just reconnecting
> immediately, instead showing that message. Does that mean anything to
> anyone? It looks like the ehci_hcd messages will go on forever, so I
> guess I will unplug it or power cycle it and hope it comes back. I
> guess the next thing to try is calling sdparm in a cron job, as one
> person suggested.
Here is (hopefully) my last followup for those interested. As I
mentioned, someone suggested off-list that I run sdparm in a cron job
like this:
* * * * * /usr/bin/sdparm /dev/sdd > /dev/null
That could very well be overkill, but it seems like a very
light-weight process. In any case, my USB drive has been up without a
single disconnect for several days now. Looks like the person was
right: The drive was going to sleep on me.
I hope this information helps someone else.
Thanks all,
Reid
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