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Bug 883629 - lvm2 rpm missing dependency on device-mapper-persistent-data (for thin_check, et al)
Summary: lvm2 rpm missing dependency on device-mapper-persistent-data (for thin_check,...
Status: CLOSED DUPLICATE of bug 870248
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: lvm2
Version: 6.3
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: ---
Assignee: LVM and device-mapper development team
QA Contact: Cluster QE
Depends On:
TreeView+ depends on / blocked
Reported: 2012-12-05 02:36 UTC by Charles Butterfield
Modified: 2012-12-05 11:42 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2012-12-05 11:37:13 UTC
Target Upstream Version:

Attachments (Terms of Use)

Description Charles Butterfield 2012-12-05 02:36:16 UTC
Description of problem: When thin LV are in use, the script /etc/lvm/lvm.conf invokes /usr/sbin/thin_check (in the package device-mapper-persistent-data) which is not pulled in by the rpm/yum dependency mechanism. 

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


How reproducible: Totally

Steps to Reproduce:
1. Create thin volume (without installing device-mapper-persisten-data)
2. Reboot
3. Failure to setup thin volumes at boot time (due to missing thin_check)
Actual results:

Expected results:

Additional info:

Comment 2 Alasdair Kergon 2012-12-05 03:48:20 UTC
In 6.3, the feature is classed as a Technology Preview https://access.redhat.com/support/offerings/techpreview/ and so we did not want to install this package for everyone by default.

You should also note that if the machine loses power while writing to a thin device, a subsequent thin_check might sometimes fail, and if it does you then need to run the repair manually to tidy up some reference counts after incomplete I/O.  See https://bugzilla.kernel.org/show_bug.cgi?id=48851 for details.  We shall automate the handling of this particular situation in future.

Comment 3 Charles Butterfield 2012-12-05 04:47:25 UTC
Thanks for the heads up!

Comment 4 Alasdair Kergon 2012-12-05 11:37:13 UTC
The dependency is already present in builds for 6.4.

Comment 5 Alasdair Kergon 2012-12-05 11:42:38 UTC

*** This bug has been marked as a duplicate of bug 870248 ***

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