Ubuntu
mdadm package

degraded raid partitions will not mount at boot time

Bug #214054 reported by Chip Schweiss
This bug report is a duplicate of:  Bug #120375: cannot boot raid1 with only one disk. Edit Remove
4
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mdadm (Ubuntu)
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Bug Description

Binary package hint: mdadm

This is on release 7.10 server with mdadm version 2.6.2-1ubuntu2.

In /etc/udev/rules.d/85-mdadm.rules, mdadm is executed with the option "--no-degraded". However, if this option is removed the infamous race condition is restored and valid raid partitions are often mounted in degraded mode.

This may have avoided the race condition that was causing raid partitions to be mounted in degraded mode, but blocks valid degraded partition from loading. If that partition is the root partition a machine is left in an unbootable state.

A more elegant solution needs to be developed that can execute "mdadm --assemble --scan --run" only on when the last partition of a raid set has been found.

Revision history for this message
ceg (ceg) wrote : hotplug mdadm setup

the mdadm in 8.04 allready supports --incremental

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