UPDATE - scsi_mod probing LUNs (again)

[Shyam_Iyer at Dell.com]

Can you attach dmesg logs?

Can you also try rebooting the tape library? Though it may not be
necessary just checking.

Thanks,
Shyam Iyer
Linux Engineering.

-----Original Message-----
From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] On Behalf Of Sturgis, Grant
Sent: Wednesday, March 05, 2008 12:12 AM
To: linux-poweredge-Lists
Subject: UPDATE - scsi_mod probing LUNs (again)

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?
> 
> Thanks for any help,
> 
> Grant
> --------------

I just noticed this:

[root at badserver ~]$ cat /sys/module/scsi_mod/max_luns
1

where on the one that works:

[root at goodserver ~]$ cat /sys/module/scsi_mod/max_luns
254


So with:

[root at badserver ~]$ grep scsi_mod /etc/modprobe.conf options scsi_mod
max_luns=254

remaking the initrd and rebooting, the option is not taking effect.

Any ideas?


TIA,

-G

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