On Thu, 31 May 2007, Bob Chiodini wrote: > > > Adam Huffman wrote: > >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 > Adam, > > I'm not sure of the why, but this link may help solve the problem. > Maybe the initrd for the latest kernel was not built with the max_luns > option. > > http://publib.boulder.ibm.com/infocenter/dsichelp/ds8000ic/index.jsp?topic=/com.ibm.storage.ssic.help.doc/f2c_linuxlunconfig_2hsaga.html > > > Read the man page on mkinitrd. I'd rename the originals before > rebuilding. If you're daring, you'll the -f option to mkinitrd to > rebuild over the originals. > Bob, Thanks so much for that - it worked a treat. I wasn't feeling daring so I renamed the originals and created a new grub entry. I'll see if there's anything in bugzilla about this and report it if not. Thanks again, Adam
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