Bug 49177 – Installer has long timeouts accessing IDE CD-ROM

Bug 49177 - Installer has long timeouts accessing IDE CD-ROM

Summary:	Installer has long timeouts accessing IDE CD-ROM

Status:	CLOSED WORKSFORME

Aliases:	None

Product:	Red Hat Linux
Classification:	Retired
Component:	kernel (Show other bugs)
Sub Component:
Version:	7.1
Hardware:	i686 Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Arjan van de Ven
QA Contact:	Brock Organ
Docs Contact:

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Depends On:
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Reported:	2001-07-16 12:12 EDT by G. Bersano
Modified:	2007-04-18 12:34 EDT (History)
CC List:	0 users

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2001-07-18 05:37:49 EDT
Type:	---
Regression:	---
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RHEL 7.3 requirements from Atomic Host:
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Description G. Bersano 2001-07-16 12:12:37 EDT

Description of problem:
During intallation process system seems to hang (ALL is frozen);
effectively it only is a loooong time out due to DMA.

How reproducible:
Always

Steps to Reproduce:
1. mount /mnt/cdrom

	

Actual Results:  After minutes the system returns to life

Expected Results:  Immediate rensponse.

Additional info:

System is compaq deskpro (Pentium III Katmai, 450 Mhz).
Upgraded to kernel-2.4.3.12.i686 but no results.

with latest kernel dmesg reports these relevant informations:

hdd: set_drive_speed_status: status=0x51 { DriveReady SeekComplete Error }
hdd: set_drive_speed_status: error=0xb4
hdd: ATAPI 48X CD-ROM drive, 128kB Cache, DMA
Uniform CD-ROM driver Revision: 3.12
hdd: timeout waiting for DMA
ide_dmaproc: chipset supported ide_dma_timeout func only: 14
scanning for RockRidge behind XA attributes
ISOFS: changing to secondary root
hdd: timeout waiting for DMA
ide_dmaproc: chipset supported ide_dma_timeout func only: 14


If I disable DMA on that device (/sbin/hdparm -d0 /dev/hdd)
the problem disappears.

The drive, as identified by /proc/ide/hdd/model is an
CRD-8480B
(maybe LG?)

Question: is this - NO DMA - the best setup or is it possible to try any
option to use again DMA?

Comment 1 Arjan van de Ven 2001-07-18 05:37:45 EDT

I've not seen better options than disabling the DMA on the drive. This error
usually is a drive advertising DMA support but not actually supporting it; but
once in a while it's a bad cable.

Comment 2 G. Bersano 2001-07-18 06:13:39 EDT

Thanks, I'll stick with NO DMA as I don't think it's a bad cable.
Maybe add this CRD-8480B to the no-dma list ?

Comment 3 Arjan van de Ven 2001-07-18 06:27:14 EDT

Yup agreed; I just added it

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