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Bug 167440 - fdisk on /dev/mapper/xxxx entries gives error when re-reading modified partition table
Summary: fdisk on /dev/mapper/xxxx entries gives error when re-reading modified partit...
Status: CLOSED DUPLICATE of bug 160277
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: device-mapper-multipath
Version: 4.0
Hardware: All
OS: Linux
Target Milestone: ---
: ---
Assignee: Alasdair Kergon
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2005-09-02 17:35 UTC by Stoo Davies
Modified: 2010-01-12 02:21 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2005-10-03 22:17:19 UTC
Target Upstream Version:

Attachments (Terms of Use)

Description Stoo Davies 2005-09-02 17:35:39 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.9) Gecko/20050715 Firefox/1.0.5

Description of problem:
I am doing some initial testing on RHES4-U2 beta release, in particular I'm testing dm-multipath/multipath-tools with a 3PAR storage array.
When trying to partition the /dev/mapper/xxxxx devices fdisk gives the following error...
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 22: Invalid argument.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.

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

How reproducible:

Steps to Reproduce:
Setup a multipathed device with the multipath command
Run fdisk on the created disk device
Save out partition table

Actual Results:  Table was not re-read

Expected Results:  Table should of been re-read and used by the kernel

Additional info:

Comment 1 Alasdair Kergon 2005-10-03 22:17:19 UTC
The kernel can't use the partition tables on these devices.

Instead we run 'kpartx' to set them up from userspace using device-mapper.

*** This bug has been marked as a duplicate of 160277 ***

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