Red Hat Bugzilla – Bug 453808
qc timeout probing TEAC DV-28E-V CD/DVD drive on SATA/PATA bridge
Last modified: 2010-10-22 22:35:22 EDT
Description of problem:
At boot and when attempting to access the CD/DVD drive the following messages
ata3.00: qc timeout (cmd 0xa0)
ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata3.00: (BMDMA stat 0x25)
ata3.00: cmd a0/01:00:00:00:00/00:00:00:00:00/a0 tag 0 cdb 0x43 data
12 in res 51/20:03:00:00:00/00:00:00:00:00/a0 Emask 0x5 (timeout)
ata3: port is slow to respond, please be patient (Status 0xd0)
ata3: port failed to respond (30 secs, Status 0xd0)
ata3: soft resetting port
ata3.00: configured for UDMA/33
ata3: EH complete
Drive identifies itself in /proc/scsi/scsi as:
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: TEAC Model: DV-28E-V Rev: C.AB
Type: CD-ROM ANSI SCSI revision: 05
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot a system with the affected drive model attached to a SATA controller via
a PATA bridge
Above messages at boot time & as the system is running (presumably when
attempting to access the drive).
No messages at boot, drive works.
A similar problem was reported to the kernel.org bugzilla:
This involved the same drive model but attached directly to an IDE controller.
In that case the problem was avoided by increasing the retry count in
drivers/ide/ide-taskfile.c:wait_drive_not_busy() from 100 to 1000 (commit
Author: Bartlomiej Zolnierkiewicz <email@example.com>
Date: Fri Jun 20 20:53:33 2008 +0200
ide: increase timeout in wait_drive_not_busy()
Some ATAPI devices take longer than the current max timeout value to
become ready (i.e. TEAC DV-W28ECW takes 6 ms) so increase the timeout
value to 10 ms.
This fixes kernel.org bugzilla bug #10887:
Reported-by: Masanari Iida <firstname.lastname@example.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <email@example.com>
Trying to get confirmation on whether increasing ata_probe_timeout actually
helped the problem. Have another report of this now - will ask the reporter to test.
Updating PM score.