After updating to Centos 4.5, I found that one of the LUNs on an external SCSI array wasn't being detected. If I add the device manually after boot echo "scsi add-single-device 0 0 1 1" > /proc/scsi/scsi it is detected. I can then use the LVM tools to activate it and then mount the LV on the device. It doesn't seem to be kernel related as I rebooted into a 4.4 kernel and the same thing happened. There's no error message I can see at boot, it just doesn't see the device. It's using a QLogic HBA but with the upstream module, not the out-of-tree QLogic one. It worked fine under 4.4. I suspect changes to dmsetup and/or multipath. Has anyone else seen something similar? Adam -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: not available URL: <http://lists.centos.org/pipermail/centos/attachments/20070531/38b31baa/attachment-0004.sig>