Re: USB external hard drive disconnecting

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Reid Rivenburgh wrote:
Hi.  I bought an external USB hard drive last week and reformatted it
as ext3.  I can mount it and read/write files, but for some reason it
periodically disconnects and reconnects.  I would like to use it as
permanent storage, hooked up to my computer all the time.  I added a
label to it and put a line in fstab to mount it.  But I'm getting
lines like these in my /var/log/messages:

Feb  5 00:07:05 pigpen kernel: usb 1-7: USB disconnect, address 4
Feb  5 00:07:06 pigpen kernel: scsi 2:0:0:0: rejecting I/O to dead device
Feb  5 00:07:06 pigpen kernel: EXT3-fs error (device sdd1):
ext3_find_entry: reading directory #2 offset 0
Feb  5 00:07:06 pigpen kernel: scsi 2:0:0:0: rejecting I/O to dead device
(and more...)

It's then quickly found again, though assigned sde1 in this case and
of course not automatically mounted.  I'm assuming the filesystem also
requires an e2fsck because it was disconnected.

Because it is mounted ext3, it may recover all by itself, but running e2fsck on it will not hurt.

Does anyone know what might be causing this?  Is it likely a hardware
issue?  I have another external drive that I've been using without
problems for about a year, but it's firewire.  Previously, I was using
both drives with autofs, but the new drive had some problems with that
approach, too.  (Now that I've learned about filesystem labels, that
seems like the way to go anyway.)

I'm running F8 with all updates (kernel-2.6.23.14-107.fc8).

Thanks,
reid

Does this drive have its own power supply, or is it powered off the USB bus? Have you noticed anything happening about the same time it has problems? (Moving the drive, the machine suspending, etc?)

The first thing I would do is check the USB cable to the drive to make sure it is plugged in all the way on both ends, and is not a defective cable. If moving the cable causes problems, that is a good indication of a cable problem. If it has its own power supply, check that connection as well. Also, check that the supply is not getting too hot.

Mikkel
--

  Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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