Very Computer

I have tried to add a 5th SCSI disk on SCO Enterprise System Release 3.0 with no
success. This was on a HP Netserver LM/66 which has Adaptec 2740 Twin Channel
SCSI-adapter.The server boots from the SCSI-disk with ID:0. When mkdev hd is ran the second time (after having rebuild and installed a new kernel) the following happen as fdisk is invoked:
        WARNING: Poll command failed on drive ID:4
        cannot open /dev/rdsk/4s0
My first guess was that something was wrong with the SCSI-disk. Not so. I have
tried a another disk and a wormunit, changed IDs on both with the same result.

Next I found that the /dev-directory contained no nodes for a fifth disk.I looked into /etc/conf/node.d/hd and found that file had no entries
for a 5th disk. Maybe the allocation of  virtual major numbers was faulting?
Dosn't seem so. A closer look on /etc/conf/cf.d/mdevice shows two hd entries:
hd      hoc      irobCcGk               hd      1       1       1       1       -1
hd      hoc     iobCcGkM                hd      80      80      1       256     -1

My belief was that /etc/conf/node.d/hd should have entries for the 5th refered to with minor numbers from 256 and above and that idmknod was to make these devicenodes during installation of the new kernel.

Am I trying to the impossible or is there a missing link?

Bj?rn Lind
Alcatel Telecom Norway
Message Handling Systems

Check the value of NDISK.  On OSE 3.0, it defaulted to 4, which may well
explain why the fifth hd causes problems. (On OSR5 it is 0 which means
the OS adjusts it dyanmically, or, it is no longer a factor.)

Also, check the value of NMOUNT, the number of mounted filesystems.

Hope this helps,
Lucky

Lucky Leavell                            Phone: (812) 945-6555
Relational Information Systems, Inc.       FAX: (812) 949-9233

New Albany, IN 47150-2013                       71534,2674 (CompuServe)
WWW Home Page:  http://www.iglou.com/ris   ftp://www.iglou.com/members/ris

Sorry I forgot to mention the value of NDISK, but it is 8, and NMOUNT is 29. So there seems to be something else.

Bj?rn Lindi
Alcatel Telecom Norway