Bug 6457

Summary:	hdparm cannot manipulate CD-ROM drives without a disk in
Product:	[Retired] Red Hat Linux	Reporter:	Chris Siebenmann <cks-rhbugzilla>
Component:	hdparm	Assignee:	Cristian Gafton <gafton>
Status:	CLOSED RAWHIDE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.1
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2000-02-17 20:14:57 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Chris Siebenmann 1999-10-28 10:07:12 UTC

If you attempt to use hdparm on an IDE CD-ROM drive without
a CD inserted, it will fail (I believe even on the 2.2.12
derived kernel Redhat ships in 6.1; at least the code is
there, according to the kernel source RPM).

 This is because as of somewhere in 2.2.*, you need to
open CD-ROM devices with O_NONBLOCK in order to talk to
them if there is no media inserted. The hdparm-3.5-1 RPM
shipped as part of Redhat 6.1 only opens the device with
O_RDONLY (checked with strace).

 Repeat by:
	hdparm /dev/cdrom
on a machine with an IDE CD-ROM and no disk inserted,
and watch the error message.

Comment 1 Bernhard Rosenkraenzer 2000-02-17 20:14:59 UTC

Thanks, fixed in 3.6-4