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. 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 apologize for missing this earlier, if this is a FreeAgent or similar drive, the drive goes to sleep, the interface shuts down, and comes back up with part as USB 1.1 and part as 2.0 (I may be describing this poorly, it's been a while). Anyway, help is here, plug in the drive and run the attached script (if the mailer doesn't eat it). If the drive plugs in as sdf (mine does) run "FixFreeAgent sdf" and the problem should go away.
I'm running F8 with all updates (kernel-2.6.23.14-107.fc8). Thanks, reid
-- Bill Davidsen <davidsen@xxxxxxx> "We have more to fear from the bungling of the incompetent than from the machinations of the wicked." - from Slashdot
#!/bin/bash # FreeAgentFix 1.4 2008-02-17 19:45:13-05 root Stable #================================================================ # FreeAgentFix - fix "Free Agent" USB drives going off line in Linux # Author: davidsen@xxxxxxx # Based on discussions in LKML and similar lists # brings the drive online # clears standby # Tells the kernel to allow restart # sanity check if [ $# -lt 1 ]; then echo "FreeAgentFix v1.4 - keeps \"Free Agent\" drives online in Linux" echo echo "Usage:" echo " ./FreeAgentFix sdX" echo echo "Where \"X\" is the drive letter assigned when the drive is connected" echo echo "Plug in the drive, see what device name is assigned to the drive" echo "using \"dmesg | tail -10\" or similar" echo "run the script with the drive name only (without /dev/)" echo echo # this should be made executable (chmod +x FreeAgentFix) but if # someone sources it, don't mess them up fn=${0##*/} if [ "$fn" == "FreeAgentFix" ]; then exit; else return fi fi disk=$1 bash -xv <<XX # Start the drive sdparm --command=start /dev/${disk} # Clear the standby sdparm --clear STANDBY -6 /dev/${disk} # Allow restart cd /sys/block/${disk}/device/scsi_disk* if [ -f allow_restart ]; then echo 1 >allow_restart fi
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