Bug 65461

Summary: (IDE SERVERWORKS)mount /dev/cdrom fails on on Compaq DL360G2 with Serverworks OSB4 IDE
Product: [Retired] Red Hat Linux Reporter: Need Real Name <joe>
Component: kernelAssignee: Arjan van de Ven <arjanv>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: high    
Version: 7.3CC: troy_mangum
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2003-06-09 14:14:43 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Description Need Real Name 2002-05-24 16:09:23 UTC
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)

Description of problem:
When attempting to mount the cdrom on a Compaq DL360G2, the error shown below 
is returned, and machine hangs. 

Serverworks OSB4 in impossible state. Disable UDMA or if you are using Seagate 
then try switching disk types on this controller. Please report this event to 
OSB4: Continuing might cause corruption

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.mount /dev/cdrom /mnt/cdrom

Actual Results:  Machine Hangs

Expected Results:  CDROM mounts. 

Additional info:

Sent copy of bug report to osb4-bug@ide.cabal.tm

Comment 1 Need Real Name 2002-05-26 17:01:21 UTC
We are seeing this same error. When was this error first reported?

Comment 2 Need Real Name 2002-05-28 11:10:26 UTC
I first saw this problem Thursday, 23 May.

Comment 3 Need Real Name 2002-05-29 17:56:13 UTC
We disabled the UDMA on the dev pointing to our CD-ROM (i.e. hda) using the 
following command: 
hdparm -d0 /dev/hda 

Our HDD was mounted to /dev/cciss/c0d0 as would all HDD on a DL360_g2 system. 
When we ran some test that mount and umount the cdrom we no longer saw this 
error. Disabling UDMA is a workaround for this error. Try this to see if it 
probides a workaround for your issue. There is still an issue, prehaps in the 

Comment 4 Elliot Lee 2002-06-20 16:01:07 UTC
Kernel issue

Comment 5 Arjan van de Ven 2002-06-20 16:06:46 UTC
hardware issue
however dma is supposed to be disabled by default already in 7.3.... (for cdrom
drives that is)

Comment 6 Need Real Name 2002-06-20 18:44:38 UTC
DMA was not disabled by default in 7.3 on this system

Comment 7 masanari iida 2002-07-09 04:47:18 UTC
On tc3100 (HP NetServer) + RH7.3 have similar problem.

After some research on web, I found following patch in the
kernel mailing list.

I hope next RedHat beta (limbo2) will include this patch.

Comment 8 Arjan van de Ven 2002-07-31 13:13:13 UTC
dma is off by default for all cdroms (initscripts does this), but please do test