NetBSD Problem Report #36676
From martin@duskware.de Sun Jul 22 11:06:50 2007
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Date: Sun, 22 Jul 2007 10:36:10 +0000 (UTC)
From: shadi.ammouri@gmail.com
Reply-To: shadi.ammouri@gmail.com
To: netbsd-bugs-owner@NetBSD.org
Subject: USB stops responding after disconnect while active
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>Number: 36676
>Category: kern
>Synopsis: USB stops responding after disconnect while active
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sun Jul 22 11:10:00 +0000 2007
>Originator: Shadi Ammouri
>Release: NetBSD-portarm-current, NetBSD-i386-current
>Organization:
>Environment:
NetBSD 4.0_BETA2 evbarm
NetBSD 4.0_BETA2 (GENERIC) i386
>Description:
When disconnecting a USB mass storage device, while the system is performing a write to it, the device becomes unusable (or the system crashes).
On i386 the system crashes.
On ARM systems the device becomes unusable, the drive cannot be unmounted or remounted.
I get the following error: "umount: /dev/sd0c: Input/output error".
When trying to force unmount the device, the system hangs (umount -f).
The USB drive is formatted with FFS.
>How-To-Repeat:
- mount the USB drive. (mount /dev/sd0c /mnt/disk")
- run dd to write some file to the disk. (dd if=/dev/zero
of=/mnt/disk/test_file")
- disconnect the disk while the write operation is in progress.
Now try to unmount the device.
>Fix:
(Contact us)
$NetBSD: query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
$NetBSD: gnats_config.sh,v 1.8 2006/05/07 09:23:38 tsutsui Exp $
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