SOLVED - scsi_mod probing LUNs (again)

[Sturgis, Grant]

Sturgis, Grant wrote:
> Good day, all,
> 
> I recently asked the list about probing LUNs through a qla2200 HBA.  The
> answer was adding:
> 
> options scsi_mod max_luns=255
> 
> to modprobe.conf, remake the initrd and reboot.  That worked fine...
> 
> But, now I am trying to do the exact same thing on another PE1950
> running RHEL 4, and am having no luck.
> 
> The device we are attaching is a Spectralogic tape library with several
> tape drives inside.  The host is only seeing the library (lun 0) and not
> the drives (luns > 0).
> 
> Is there a way to enable debugging for scsi_mod to see what is going
> wrong?  Does anyone have any other suggestions?

Examining the differences between the server that is working and the 
server that is not, I noticed that the new server was running a slightly 
newer kernel (2.6.9-67.ELsmp vs. 2.6.9-67.04.ELsmp).

So I created a new initrd with the scsi_mod option max_luns=254, 
rebooted and it worked.

Anyone out there using max_luns, be careful!

Any suggestions or comments about this, I am interested.

> 
> Thanks for any help,
> 
> Grant
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> 
> 
> 

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