? sd driver LUN > 1

? sd driver LUN > 1

Post by Andrey Ryzho » Fri, 03 Oct 1997 04:00:00


I have several RAID boxes attached to SWIFT controllers
on Ultra2's and SS20's running Solaris 2.5.1
with the recommended patch cluster
(as of August 1997).

RAID appears to the host as three physical disks
sitting on the same SCSI ID with different LUNs:

 Target 0
   Unit 0   Disk     BoxHill RAID 5300 Turbo B.1
   Unit 1   Disk     BoxHill RAID 5300 Turbo B.1
   Unit 2   Disk     BoxHill RAID 5300 Turbo B.1

/kernel/drv/sd.conf has entries for extra LUNs:

  name="sd" class="scsi"
          target=0 lun=0;
          target=0 lun=1;
          target=0 lun=2;
          target=0 lun=3;

After booting with -r ,
I can see LUNs 0 and 1 but not LUN 2:

       0. c1t0d0 <BoxHill-RAID5300Turbo-B.1 cyl 4093 alt 2 hd 16 sec 64>

       1. c1t0d1 <BoxHill-RAID5300Turbo-B.1 cyl 24798 alt 2 hd 16 sec

I've also tried to put the entry by hand into /etc/path_to_inst:

and reboot -- -r
but it didn't change anything.

Except for size and LUN, there is no difference -
all three sets are configured in exactly the same way.
Device on LUN=2 is about 6gb, just in case it matters :-)
Does 2.5.1 support LUNs 0 trough 7, anyway?
What am I doing wrong?

Any hints and guesses are welcome.



1. /dev/sd? and LUN numbers

If I have SCSI HD at LUN 1 ,3 ,and 5,  what are the /dev/sd
names?  The 1 is /dev/sda but the rest?  Does it assign them
in seq. LUN order. So, LUN 1 is sda, LUN 3 is sdb and LUN 5 is
sdc.  Or sometin' else?


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