Bug 479787 – DMA issue for IDE mode of SATA HDD (HDIO_SET_failed)

Bug 479787 - DMA issue for IDE mode of SATA HDD (HDIO_SET_failed)

Summary:	DMA issue for IDE mode of SATA HDD (HDIO_SET_failed)

Status:	CLOSED INSUFFICIENT_DATA

Aliases:	None

Product:	Red Hat Enterprise Linux 5
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	5.2
Hardware:	x86_64 Linux

Priority	low Severity medium
Target Milestone:	rc
Target Release:	---
Assigned To:	Red Hat Kernel Manager
QA Contact:	Red Hat Kernel QE team
Docs Contact:

URL:
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Keywords:

Depends On:
Blocks:
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Reported:	2009-01-12 21:37 EST by Lin Avator
Modified:	2009-08-11 17:11 EDT (History)
CC List:	1 user (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2009-08-11 17:11:36 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
HDIO_SET_DMA failed (63.97 KB, image/png) 2009-01-12 21:39 EST, Lin Avator	no flags	Details
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Lin Avator 2009-01-12 21:37:32 EST

Description of problem:

   On our Tylersburg platform, we encounter the IDE DMA problem for RHEL5.2 x86_64. The steps to reproduce are listed as below.

1. attach SATA HDD, and configure BIOS to take it as IDE mode
2. install RHEL 5.2 x85_64
3. check the HDD DMA status by "hdparm /dev/hda" command, it shows that DMA is not enable
4. enable DMA by "hdparm -d 1 /dev/hda", but shows error message as "HDIO_SET_failed: Operation not permitted"

   ( The screen is captured and saved in attachment. )

   Since our Tylersburg platform can not enable DMA in IDE mode, the system got very slow. How could we solve this problem ?

Comment 1 Lin Avator 2009-01-12 21:39:23 EST

Created attachment 328814 [details]
HDIO_SET_DMA failed

Comment 2 Anton Arapov 2009-01-13 10:16:50 EST

Please, try to enable the Legacy mode for ATA/IDE in your BIOS and
attach the output of the hdparm -I /dev/hda for the both cases.

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