I received many replies to my question as to my question on how many
SCSI devices could be supported on the SPARCstation 20's SCSI bus, and
why the disk I was inserting in target ID #7 of the Sun MultiPack enclosure
was not being recognized.
First of all let me apologize for a mistake. The disk that was not being
recognized was at target ID #8 in the enclosure, not target ID#7. In
fact, the enclosure does not have any slots for target IDs 6 and 7.
The answer to my problem as everyone pointed out was that SPARCstation 20
only supports narrow SCSI with a 50 pin external SCSI connector. While
the Sun MultiPAck enclosure does support wide SCSI (68-pin connector) it will
be constrained by the SPARC 20's in-built SCSI host adapter.
Narrow SCSI only supports 8 devices, from target IDs 0 to 7 and
Wide SCSI allows one to go up to target ID 15. In my case the SCSI host
adapter had target ID #7.
One possible solution would be to buy annother SCSI card that supports
wide SCSI. The use of RAID enclosures in which the controller is a single
target
device and the disks inside of it are different LUNs was also suggested.
It was also suggested that I use target ID #0 since that is not currently used.
Thanks a lot to all those who responded!
Saurabh
--
_______________________________________________________________________________
. .
Saurabh Jang ... ... E-mail : jang@eis.comm.mot.com
Motorola, iDEN ..... ..... Voice : (847) 576-2630
1301 East Algonquin Road .. ... .. Fax : (847) 538-5564
Schaumburg, IL 60196 . . . Mail Drop : Building IL02, Room 3346
_______________________________________________________________________________
This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:12:41 CDT