Bug 1400060
| Summary: | blkid is unable to detect filesystem on thinly provisioned lvm member | |||
|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | James Hogarth <james.hogarth> | |
| Component: | util-linux | Assignee: | Karel Zak <kzak> | |
| Status: | CLOSED NOTABUG | QA Contact: | qe-baseos-daemons | |
| Severity: | unspecified | Docs Contact: | ||
| Priority: | unspecified | |||
| Version: | 7.3 | CC: | agk, lpol, prajnoha | |
| Target Milestone: | rc | |||
| Target Release: | --- | |||
| Hardware: | Unspecified | |||
| OS: | Unspecified | |||
| Whiteboard: | ||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | ||
| Doc Text: | Story Points: | --- | ||
| Clone Of: | ||||
| : | 1400135 (view as bug list) | Environment: | ||
| Last Closed: | 2016-12-01 12:36:05 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: | ||||
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Description
James Hogarth
2016-11-30 11:47:16 UTC
[root@c7-multidisktest ~]# mount /home/jenkins/ mount: can't find UUID=a99a213f-6af6-4707-a597-6fee02bd2b31 [root@c7-multidisktest ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 20G 0 disk ├─sda1 8:1 0 500M 0 part /boot └─sda2 8:2 0 19.5G 0 part ├─centos_c7--template-root 253:0 0 17.5G 0 lvm / └─centos_c7--template-swap 253:1 0 2G 0 lvm [SWAP] sdb 8:16 0 20G 0 disk └─sdb1 8:17 0 20G 0 part ├─vg_data-jenkins_tmeta 253:2 0 12M 0 lvm │ └─vg_data-jenkins 253:4 0 10G 0 lvm ├─vg_data-jenkins_tdata 253:3 0 10G 0 lvm │ └─vg_data-jenkins 253:4 0 10G 0 lvm └─vg_data-testdata 253:5 0 5G 0 lvm /mnt/testdata1 sdc 8:32 0 60G 0 disk └─sdc1 8:33 0 60G 0 part /mnt/testdata2 [root@c7-multidisktest ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert root centos_c7-template -wi-ao---- 17.47g swap centos_c7-template -wi-ao---- 2.00g jenkins vg_data twi-a-tz-- 10.00g 0.00 0.62 testdata vg_data -wi-ao---- 4.98g [root@c7-multidisktest ~]# xfs_admin -u /dev/vg_data/jenkins UUID = a99a213f-6af6-4707-a597-6fee02bd2b31 [root@c7-multidisktest ~]# blkid /dev/vg_data/jenkins [root@c7-multidisktest ~]# argh bad copy paste overwrite ... comment 2 shows that this bug prevents mounting a thin provisioned LVM member via UUID as well (In reply to James Hogarth from comment #0) > Description of problem: > When using a thinly provisioned LVM member blkid is unable to detect the > filesystem and report data such as UUID > > Version-Release number of selected component (if applicable): > libblkid-2.23.2-33.el7.x86_64 > util-linux-2.23.2-33.el7.x86_64 > > How reproducible: > Always > > Steps to Reproduce: > 1. lvcreate -n full -l 10%FREE vg_myvg > 2. lvcreate -n tp -T -l 10%FREE vg_myvg > 3. mkfs.xfs /dev/vg_myvg/full > 4. mkfs.xfs /dev/vg_myvg/tp This is not correct. To create thin LV, you need to create thin pool first and then you need to allocate thin LV out of that pool, for example: lvcreate -n thin_pool -L <pool_size_here> -T vg_myvg lvcreate -n thin_lv -V <virtual_thin_lv_size_here> -T vg_myvg/thin_pool (In reply to James Hogarth from comment #0) ... > 2. lvcreate -n tp -T -l 10%FREE vg_myvg ... > 4. mkfs.xfs /dev/vg_myvg/tp (Here, you wrote directly to thin pool device - you can't do that - thin pool is only for LVM to allocate thin LVs from.) Note that libblkid explicitly ignores private LVM devices (e.g. pool metadata etc.) -- this is reason why blkid may returns nothing. *** Bug 1400135 has been marked as a duplicate of this bug. *** |