Linux and SCSI probe luns

[Dineshkumar Surpur]

I was told that Compaq Storage Array connected to a Host HBA ex: Emulex does not need the config setting "Probe all luns on each SCSI device" and rebuild the kernel to discover multiple exported luns on the host it is true ? and if it is then do the Compaq storage arrays present multiple luns as different targets each has one lun (presents as jbods disks) to the Emulex host HBA driver ? does anybody know on this.

[Thilo Knoch]

This is quite not the answer for the question about the Compaq Storage Array, but in most cases there is no need to rebuild the kernel, only a change in the /etc/modules.conf and a rebuild of the initrd is needed for accessing multiple LUNs of a single Target.
See my answer:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=229986

[Dineshkumar Surpur]

It seems Compaq aray vendors give a script
which will rebuild the kernel enabling
probing for multiple luns. It is not
possible to scan multiple luns ( one target) just be adding statement "alias scsi_mod max_scsi_luns" statement in /etc/modules.conf.