Messages in this thread | | | Date | Wed, 26 Jun 2002 14:33:37 +0200 | From | Kurt Garloff <> | Subject | Re: max_scsi_luns and 2.4.19-pre10. |
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Hi Austin,
enough guesses have been there not answering your questions ...
On Tue, Jun 25, 2002 at 07:46:25PM -0500, Austin Gonyou wrote: > This originally was asking for help regarding QLA2200's, but I've since > discovered it's a kernel param problem that I'm not sure how to solve. > > Using a default RH kernel (from SGI XFS installer) and passing > max_scsi_luns=128 in grub, and for scsi_mod, it seems to work.
In 2.4.19pre1 a patch was merged into mainline which introduced a flag BLIST_LARGELUN and set it for EMC Symmetrix devices. Some distributors (incl. RH and SuSE) did ship kernels with this patch included. http://van-dijk.net/linuxkernel/200206/0347.html (An older patch for 2.4.16 exists as well.)
The flag does allow a device to use more than 8 LUNs despite it reporting as SCSI Version 2 devices (which can not support more than 8 LUNs normally ...) The flag also needs to be set for some more devices, look for DGC, DELL, CMD and CNSi/CNSI devices that already have the BLIST_SPARSELUN flag.
But as you did not post the output of /proc/scsi/scsi nor the syslog meesages from your SCSI subsystem nobody knows what devices you're using or what actually happens. Just speculations ...
PS: The better list for such questions is linux-scsi@vger.kernel.org
Regards, -- Kurt Garloff <garloff@suse.de> Eindhoven, NL GPG key: See mail header, key servers Linux kernel development SuSE Linux AG, Nuernberg, DE SCSI, Security [unhandled content-type:application/pgp-signature] | |