Subject: USB drive input / output error
To: None <email@example.com, firstname.lastname@example.org>
From: Shadi Ammouri <email@example.com>
Date: 07/17/2007 09:24:04
I'm running NetBSD-current on an ARM based system.
I have a problem after disconnecting a USB drive while a write
operation is active.
I do the following:
- mount the USB drive. (mount /dev/sd0c /mnt/disk")
- run dd to write some file to the disk. (dd if=/dev/zero
- disconnect the disk while the write operation is in progress.
From that point, I cannot unmount the drive, or remount it.
I get the following error: "umount: /mnt/disk: Input/output error".
The USB drive is formatted with FFS.
The only way by which I can resolve this problem is by restarting the system.
How can I recover from this error without restarting the system.