Bug 842551

Summary:	libguestfs: error: part_list: could not parse row from output of parted print command: /dev/vdb:654188544B:virtblk:512:512:unknown:Virtio Block Device:;
Product:	[Community] Virtualization Tools	Reporter:	Richard W.M. Jones <rjones>
Component:	libguestfs	Assignee:	Richard W.M. Jones <rjones>
Status:	CLOSED DUPLICATE	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	dyasny, mbooth
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Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-07-24 07:49:55 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Richard W.M. Jones 2012-07-24 07:37:28 UTC

Description of problem:

For some reason this only happens with virt-alignment-scan,
not with virt-df, even though both tools do roughly the same
operations.

$ sudo virt-df -d Win2003
Filesystem                           1K-blocks       Used  Available  Use%
Win2003:/dev/sdb                        638856     638856          0  100%
Win2003:/dev/sda1                      6281380    3405532    2875848   55%

$ sudo virt-alignment-scan -d Win2003
/dev/sda1        32256          512    bad (alignment < 4K)
libguestfs: error: part_list: could not parse row from output of parted print command: /dev/vdb:654188544B:virtblk:512:512:unknown:Virtio Block Device:;

$ sudo virt-alignment-scan -d Win2003 -x
libguestfs: trace: add_domain "Win2003" "readonly:true" "allowuuid:true" "readonlydisk:read"
libguestfs: trace: add_domain = 2
libguestfs: trace: launch
libguestfs: trace: launch = 0
libguestfs: trace: list_devices
libguestfs: trace: list_devices = ["/dev/vda", "/dev/vdb"]
libguestfs: trace: part_list "/dev/vda"
libguestfs: trace: part_list = <struct guestfs_partition_list *>
/dev/sda1        32256          512    bad (alignment < 4K)
libguestfs: trace: part_list "/dev/vdb"
libguestfs: trace: part_list = NULL (error)
libguestfs: error: part_list: could not parse row from output of parted print command: /dev/vdb:654188544B:virtblk:512:512:unknown:Virtio Block Device:;
libguestfs: trace: close
libguestfs: trace: shutdown
libguestfs: trace: internal_autosync
libguestfs: trace: internal_autosync = 0
libguestfs: trace: shutdown = 0

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

libguestfs 1.18.5

How reproducible:

100% on a single Windows 2003 guest with two disks.

Comment 1 Richard W.M. Jones 2012-07-24 07:46:26 UTC

Same error in libguestfs 1.19.24.

Comment 2 Richard W.M. Jones 2012-07-24 07:49:55 UTC

OK, so this is parted stupidity, and a dupe of a
bug we've already found and fixed in parted (but only
in Rawhide).

The output of the command is:

# parted -m -- /dev/vdb unit b print
Error: /dev/vdb: unrecognised disk label                                  
BYT;
/dev/vdb:654188544B:virtblk:512:512:unknown:Virtio Block Device:;

NB The error message is set to stdout.

parted-3.0-10.fc17.x86_64

*** This bug has been marked as a duplicate of bug 745606 ***