Re: Raid 5 Problem

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nterry wrote:

Great - All working. Then I rebooted and was back to square one with only 3 drives in /dev/md0 and /dev/sdb in /dev/md_d0 So I am still not understanding where /dev/md_d0 is coming from and although I know how to get things working after a reboot, clearly this is not a long term solution...


My blind shot is that udev rules of your distro are doing mdadm --incremental assembly and picking sdb as a part of nonexisting array from the long ago (leftover after old experimentations ?). Or something else is doing so.

What does mdadm -Esvv /dev/sdb show ?

Add

DEVICE /dev/sd[bcde]1

on top of your mdadm.conf - it should stop --incremental from picking up sdb. Assuming that's the cause of the problem.

Also note, that FC9 might be trying to assemble the array during initramfs stage (assuming it uses one) and having problems there. I've never used Fedora so hard to tell for me - but definitely peek there, particulary at udev and mdadm part of things.

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