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Bug 199033

Summary: Unable to specify parity
Product: Red Hat Enterprise Linux 4 Reporter: John Newbigin <jn>
Component: mdadmAssignee: Doug Ledford <dledford>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: tao
Target Milestone: ---Keywords: Reopened
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: RHBA-2007-0290 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-05-01 17:47:29 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:
Bug Depends On:    
Bug Blocks: 176344    
Attachments:
Description Flags
Fix testing for an unset parity (layout) none

Description John Newbigin 2006-07-16 04:29:19 UTC 
Description of problem:
When using mdadm to create a RAID5 array, it is impossible to specify the parity
algorithm.


Version-Release number of selected component (if applicable):
mdadm-1.6.0-3

How reproducible:
Every time.

Steps to Reproduce:
1. You need some partitions or files setup with losetup
2. mdadm --create -l 5 -p la -n 3 /dev/md0 /dev/loop0 /dev/loop1 /dev/loop2
3. check the error message
  
Actual results:
mdadm: layout may only be sent once.  Second value was la


Expected results:
Create the RAID array.

Additional info:
This is a software bug which has been fixed in newer versions of mdadm.
In the RH version, the bug can be seen on line 444 of mdadm.c.  UnSet is a
constant but it is a positive number, to the test "layout >= 0" is always true.
 Updated mdadm changes the test to be "layout != UnSet" which works.
Comment 1 John Newbigin 2006-07-16 04:33:50 UTC 
Created attachment 132520 [details]
Fix testing for an unset parity (layout)
Comment 2 Doug Ledford 2006-08-25 04:29:28 UTC 

*** This bug has been marked as a duplicate of 197055 ***
Comment 3 John Newbigin 2006-08-27 23:33:59 UTC 
But "You are not authorized to access bug #197055", so how would I ever know?
Comment 4 Doug Ledford 2006-08-28 00:02:35 UTC 
It doesn't really say anything more than this one (I can't change the
permissions to allow you to see the other bug, or else I would).  Both reports
are legitimate and targetted for being fixed in the next update release.
Comment 5 Doug Ledford 2006-08-28 00:05:27 UTC 
*** Bug 197055 has been marked as a duplicate of this bug. ***
Comment 6 John Newbigin 2006-08-28 00:09:41 UTC 
Thanks for the feedback.
Comment 7 Daniel Riek 2006-08-28 22:17:41 UTC 
The component of this request is planned to be updated in Red Hat enterprise
Linux 4.5.

This enhancement request was evaluated by Red Hat Product Management for
inclusion in a Red Hat Enterprise Linux maintenance release.

Product Management has requested further review of this request by Red Hat
Engineering, for potential inclusion in a Red Hat Enterprise Linux Update
release for currently deployed products.

This request is not yet committed for inclusion in an Update release.
Comment 10 Doug Ledford 2007-01-31 19:24:08 UTC 
We are updating mdadm to 1.12.0 for RHEL4.5 and that update solves this problem.
Comment 14 Red Hat Bugzilla 2007-05-01 17:47:29 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2007-0290.html
Comment 15 Issue Tracker 2007-06-11 10:20:02 UTC 
Customer has been notified by the errata.

Thanks!

Internal Status set to 'Resolved'
Status set to: Closed by Tech
Resolution set to: 'RHEL 4.5'

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