Turns out that, with 2.4 kernels, you need to add

  options scsi_mod max_scsi_luns=255

to modules.conf and use a new ram disk image...

  V=2.4.21-37.ELsmp
  cd /boot
  sudo mv initrd-$V.img initrd-$V.img.ORIG
  sudo mkinitrd initrd-$V.img $V
  sudo lilo # not necessary?
  sudo shutdown -r now

(see redhat bug 147671)

2.6 kernels (eg rhel4 and grml 0.5) simply require
adding max_scsi_luns=2 to the kernel boot command line
(see the mtx FAQ)

steve 
- - - 
systems & network manager
high energy physics
university of wisconsin

 > ---- Original Message ----
 > From: rader
 > Anybody know of any gotchas re installing auto-detected scsi
 > stackers under RHEL3?  
 > 
 > I recently cabled a Quantium SuperLoader to a rhel304 box,
 > but even the more (most?) recent 2.4.21-37 kernel's scsi layer
 > doesn't see it.  When cabled to an Adaptec I20 RAID controller,
 > the dpt drivers says "TID 514 Vendor: QUANTUM Device: UHDL Rev:
 > 002D", so I know it's there.  (And, heck, the thing even works
 > with Networker 6.1.4 on Sun Solaris7.)
 > 
 > Does anyone know/think it'll work on RHEL4?
 > 
 > steve 
 > - - - 
 > systems & network manager
 > high energy physics
 > university of wisconsin

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