| Summary: | cannot readd a partition to a mirror | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Nerijus Baliūnas <nerijus> |
| Component: | mdadm | Assignee: | Doug Ledford <dledford> |
| Status: | CLOSED NOTABUG | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 16 | CC: | agk, dledford, Jes.Sorensen, mbroz |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-11-21 11:54:48 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
Just follow the instructions provided in the output from mdadm. The issue with raid1 is that if you just re-add it, mdadm wouldn't know which of the two drives is authoritative and you could end up with old data. If you mdadm --zero-superblock /dev/sdb4 first you should be able to re-add the drive. |
/dev/sdb4 was a part of /dev/md2, but was removed manually. After reboot: # cat /proc/mdstat Personalities : [raid1] md2 : active raid1 sda4[1] 404468416 blocks [2/1] [_U] # mdadm /dev/md2 -a /dev/sdb4 mdadm: /dev/sdb4 reports being an active member for /dev/md2, but a --re-add fails. mdadm: not performing --add as that would convert /dev/sdb4 in to a spare. mdadm: To make this a spare, use "mdadm --zero-superblock /dev/sdb4" first. How do I readd sdb4 to md2?