Bug 747450

Summary:	scsi_debug module num_parts creates a bad partition table
Product:	Red Hat Enterprise Linux 6	Reporter:	Brian Lane <bcl>
Component:	kernel	Assignee:	Red Hat Kernel Manager <kernel-mgr>
Status:	CLOSED DUPLICATE	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	6.2	CC:	mlombard
Target Milestone:	rc
Target Release:	---
Hardware:	s390x
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-11-20 13:38:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Brian Lane 2011-10-19 20:24:20 UTC

Description of problem:
When passing num_parts=4 (or even =1) it creates a partition table that is invlid. This happens on s390x and possibly on ppc64. It works fine on x86 systems.


Version-Release number of selected component (if applicable):
Linux  2.6.32-207.el6.s390x #1 SMP Mon Oct 10 01:56:05 EDT 2011 s390x s390x s390x GNU/Linux


Steps to Reproduce:
1. modprobe scsi_debug num_parts=4
2. dmesg


Additional info:

dmesg output from modprobe scsi_debug num_parts=4

scsi_debug: host protection
scsi36 : scsi_debug, version 1.82 [20100324], dev_size_mb=8, opts=0x0
scsi 36:0:0:0: Direct-Access     Linux    scsi_debug       0004 PQ: 0 ANSI: 5
sd 36:0:0:0: Attached scsi generic sg1 type 0
sd 36:0:0:0: [sdb] 16384 512-byte logical blocks: (8.38 MB/8.00 MiB)
sd 36:0:0:0: [sdb] Write Protect is off
sd 36:0:0:0: [sdb] Mode Sense: 73 00 10 08
sd 36:0:0:0: [sdb] Write cache: enabled, read cache: enabled, supports DPO and FUA
 sdb: sdb1 sdb2 sdb3 sdb4
sdb: p1 ignored, start 536870912 is behind the end of the disk
sdb: p2 ignored, start 983040 is behind the end of the disk
sdb: p3 ignored, start 2031616 is behind the end of the disk
sdb: p4 ignored, start 3080192 is behind the end of the disk
sd 36:0:0:0: [sdb] Attached SCSI disk

Comment 2 RHEL Program Management 2011-10-25 05:48:42 UTC

Since RHEL 6.2 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.

Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.

Comment 3 Maurizio Lombardi 2013-11-20 13:38:24 UTC


*** This bug has been marked as a duplicate of bug 563489 ***