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Bug 74600 - DMA on cdrom not disabled
DMA on cdrom not disabled
Product: Red Hat Linux
Classification: Retired
Component: initscripts (Show other bugs)
i386 Linux
medium Severity high
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Assigned To: Bill Nottingham
Brock Organ
Depends On:
  Show dependency treegraph
Reported: 2002-09-27 10:50 EDT by Daniel Roche
Modified: 2014-03-16 22:31 EDT (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2002-09-27 10:50:13 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Daniel Roche 2002-09-27 10:50:07 EDT
Description of Problem:

On a computer with only one ide cdrom device ( scsi disks and 1 ide cdrom )
the rc.sysinit script failed to turn off DMA on cdrom.

I have met the problem on a compaq proliant 3xx server, because the kernel
crashes if you try to use the cdrom with the dma enabled !

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

initscripts 6.67

How Reproducible:

each time 

Steps to Reproduce:
just boot a system with only one ide cdrom ( scsi disks )

Actual Results:

the DMA is ON for the cdrom

Expected Results:

it should be OFF

Additional Information:

the problem comes from the :
grep -v ide-disk /proc/ide/*/*/driver 2>/dev/null | awk -F / '{ print $5 }'`

if you have only one ide device, the grep does not add the path of the file
before the matching string, and thus the awk find nothing !

using grep -lv ide-disk..... will solve the problem.

Best Regards
Comment 1 Bill Nottingham 2002-09-27 11:59:40 EDT
Yeah, that code is broken. It's removed in current releases due to it being the
wrong way to do things.

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