How does Software Raid sync data after detaching one of disks configured with RAID 1 in RHEL 6?
Issue
Currently /dev/md0 is using as RAID 1 created after running mdadm command with /dev/sdb and /dev/sdcs.
Recently there was storage failure. so, only /dev/sdc are running which means, in status that /dev/sdb have
been detached into RHEL. for the certain reason /dev/sdb has not been attached online into RHEL, we are gonna attach
/dev/sdb into RHEL after shutting system down and doing storage job physically.
In current situation, how does Software Raid sync based on which disk if /dev/sdb ( old data included ) and /dev/sdc ( latest data included ) have different data which have not been synced?
Is syncing start first from /dev/sdc ( latest data included )? Or Is syncing start based on who is first recognized physically between /dev/sdb and /dev/sdc?
Environment
Red Hat Enterprise Linux 6
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.