Re: Large disk support in RHEL 3?

[Pasi Pirhonen <upi iki fi>]

Hi,


On Thu, Jul 22, 2004 at 04:04:33PM -0500, Tran Charles A Civ OC-ALC/ITMA wrote:
> Has there been anymore progess on this.. 
> 
> I have tried recompiling the kernel to support multiple LUNS but the
> make modules fails..
> 

>From the release notes

     o The SCSI standard requires that all SCSI devices respond to Logical
       Unit Number (LUN) zero. Some SCSI devices fail when they are scanned
       for Logical Unit Numbers (LUNs) greater than zero. Other devices
       require that LUNs must be numbered sequentially.

       The Red Hat Enterprise Linux 3 Update 1 kernel contains a list of
       devices that have been tested and shown to work correctly when scanned
       for non-zero LUNs, and non-sequential LUNs. Only devices on this list
       are scanned by default. This default behavior can be overridden on a
       system-wide basis by adding the following entry to the
       /etc/modules.conf file:

       options scsi_mod max_scsi_luns=255

       After modifying modules.conf, it is necessary to rebuild the initial
       ramdisk file using the mkinitrd script. Refer to mkinitrd man page
       (using the command man mkinitrd) for more information about creating
       the initial ramdisk image.

       When this option is used, the LUN numbers on the device must be
       assigned sequentially, starting with zero.

... so there is no need to make custom kernel for multi-lun support.




-- 
Pasi Pirhonen - upi iki fi - http://iki.fi/upi/