Bug 24113 - IDE drive not running at full ATA-100
Summary: IDE drive not running at full ATA-100
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: kernel
Version: 7.1
Hardware: i386
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Michael K. Johnson
QA Contact: Brock Organ
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2001-01-16 15:28 UTC by Bryan Leopard
Modified: 2007-04-18 16:30 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2001-01-22 20:11:55 UTC
Embargoed:

Attachments (Terms of Use)

Description Bryan Leopard 2001-01-16 15:28:52 UTC 
Compaq ML330ES
Florence Beta 2

This unit has an ATA-100 capable drive and controller, but the kernel is 
not enabling mode udma5.  Verified by running hdparm -i

workaround:
Enable udma5 manually using hdparm.
Comment 1 Arjan van de Ven 2001-01-22 18:50:01 UTC 
Do not ever use hdparm to enable udma5. Use the "ide1=ata" on the lilo
command-line, but only if you have the proper (80 ribbon) cable.

The reason that the parameter is needed is that linux is not quite capable
of detecting the presence of this cable, and assumes the safe default of not
having the cable.
Comment 2 Arjan van de Ven 2001-01-22 20:11:51 UTC 
make that "ide1=ata66"
Comment 3 Arjan van de Ven 2001-02-23 12:54:51 UTC 
Closing as not a bug, as this isn't one.
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