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Article Reference

Article ID: 5809
Last update: 08-22-05
Issue:
After creating a logical volume (LV) on top of software RAID partitions, why does /dev/md0 not seem to be mounted even though mount, read, and write commands to the LV seem to work?
Resolution:

Release Found: Red Hat Enterprise Linux 3

Symptom:
After creating a RAID1 partition, putting LVM on top of it and then adding an entry on /etc/fstab to automount it, the system was rebooted. mount shows the logical volumes mounted successfully. Users can also read and write to the filesystem. However, pvdisplay on /dev/md0 shows nothing when looking into /proc/mdstat. Only when a raidstart is applied on /dev/md0 does it show up in pvdisplay.

Solution:
md partitions look exactly like any other partitions except the last 64K which contains the md superblock. LVM activates the physical volume (PV) without activating RAID.

After you rebuild the initial ramdisk, this issue should be resolved. See additional articles in the Knowledgebase on how to rebuild the initrd.


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Red Hat Enterprise Linux > AS/ES/WS v. 3 > Issue <<   410  of  594  >>