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)
Keywords:
Status: CLOSED INSUFFICIENT_DATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.2
Hardware: x86_64
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Red Hat Kernel Manager
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2009-01-13 02:37 UTC by Lin Avator
Modified: 2009-08-11 21:11 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2009-08-11 21:11:36 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
HDIO_SET_DMA failed (63.97 KB, image/png)
2009-01-13 02:39 UTC, Lin Avator 		no flags Details
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Description Lin Avator 2009-01-13 02:37:32 UTC 
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 2009-01-13 02:39:23 UTC 
Created attachment 328814 [details]
HDIO_SET_DMA failed
Comment 2 Anton Arapov 2009-01-13 15:16:50 UTC 
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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