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Bug 2163568

Summary: option --wipesignatures ignored
Product: Red Hat Enterprise Linux 8 Reporter: Yuri Arabadji <yuri>
Component: lvm2Assignee: LVM and device-mapper development team <lvm-team>
lvm2 sub component: Command-line tools QA Contact: cluster-qe <cluster-qe>
Status: CLOSED NOTABUG Docs Contact:
Severity: unspecified    
Priority: unspecified CC: agk, heinzm, jbrassow, msnitzer, prajnoha, thornber, zkabelac
Version: 8.7Flags: pm-rhel: mirror+
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
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Clone Of: Environment:
Last Closed: 2023-01-24 13:22:09 UTC Type: Bug
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Yuri Arabadji 2023-01-23 22:40:04 UTC 
Description of problem:

lvcreate -n xx/xx -L 732565m --wipesignatures y
  Rounding up size to full physical extent <715.40 GiB
WARNING: dos signature detected on /dev/xx/xx at offset 510. Wipe it? [y/n]: 

It seems like this option, along with `--zero y`, is ignored. `--yes` works, but that's not what I need.

Version-Release number of selected component (if applicable):
  el8 latest.

  LVM version:     2.03.14(2)-RHEL8 (2021-10-20)
  Library version: 1.02.181-RHEL8 (2021-10-20)

Steps to Reproduce:
lvcreate -L 1g -n vg/lv1
echo 'label: dos' | sfdisk --no-reread /dev/vg/lv1
lvremove vg/lv1
lvcreate -L 1g -n vg/lv1 --wipesignatures y

Thanks.
Comment 1 Zdenek Kabelac 2023-01-24 13:22:09 UTC 
lvm tool currently works as designed and as documented:

Wipe signature option controls whether there will be *ALSO* signature checking and prompting for wipe of found signatures.

thus  --wipesignature n  && --zero y    basically only zeroes 1st. 8KiB of a device.


Switch --yes enables automatic 'yes' answer to any prompt command generates.
Comment 2 Zdenek Kabelac 2023-01-24 13:31:00 UTC 
(it's worth to note that  '--wipesignature y'  is enabled by default for any lvcreate command - so you could actually 'disable' it through this option if signature checking is not desired.)