From: lbelan@fert1.fe.psu.edu (Lawrence Belan ][/40960)
Subject: SCSI and Logical drives problem?
Organization: PennState - Fayette Campus Computer Center
Date: Mon, 14 Dec 92 16:42:51 GMT

About a month ago, I posted a problem with having my Adaptec 1542B
SCSI controller exist peacefully with two RLL hard drives that are
already in my system.  Here's what I've been able to find out and a
few more questions to the masses (and IBM).

Here's how I have the drives setup:
(at least this is how they show up under DOS 5.0)

Drive 1 (RLL)       Drive 2 (RLL)       Drive 3 (SCSI)

+---------------+   +---------------+   +----------------+  
|60 Meg Primary |   |60 Meg Logical |   |318 Meg         |  
|Drive C:       |   |Drive G:       |   |Drive K:        |  
+---------------+   +---------------+   +----------------+  
|60 Meg Logical |   |60 Meg Logical |   
|Drive D:       |   |Drive H:       |   
+---------------+   +---------------+   
|60 Meg Logical |   |60 Meg Logical |   
|Drive E:       |   |Drive I:       |   
+---------------|   +---------------+   
|13 Meg Logical |   |14 Meg Logical |   
|Drive F:       |   |Drive J:       |   
+---------------+   +---------------+   
|OS/2 Boot      |   
|Manager 1 Meg  |   
+---------------+   

The SCSI Drive shows up at the END of the Drive List as K:

I have OS/2 loaded on Drive D: and boot it via Boot Manager.  However,
through some extensive testing (thanks mostly to booting OS/2 from a
floppy with the aha154x.add driver)...The SCSI disk shows up as the D:
Drive!  This causes the boot procedure to die since my OS/2 files are
now located on the E: drive, and it's expecting them on the Current D:
drive (my SCSI disk)!

Here's what the drives look like after booted from an OS/2 Floppy:


Drive 1 (RLL)       Drive 2 (RLL)       Drive 3 (SCSI)

+---------------+   +---------------+   +----------------+  
|60 Meg Primary |   |60 Meg Logical |   |318 Meg         |  
|Drive C:       |   |Drive H:       |   |Drive D:        |  
+---------------+   +---------------+   +----------------+  
|60 Meg Logical |   |60 Meg Logical |   
|Drive E:       |   |Drive I:       |   
+---------------+   +---------------+   
|60 Meg Logical |   |60 Meg Logical |   
|Drive F:       |   |Drive J:       |   
+---------------|   +---------------|   
|13 Meg Logical |   |14 Meg Logical |   
|Drive G:       |   |Drive K:       |   
+---------------+   +---------------+   
|OS/2 Boot      |   
|Manager 1 Meg  |   
+---------------+   

More testing has shown that if I partition out the second RLL drive
with one PRIMARY drive..It will become the D: drive and the SCSI disk
will be bumped up to E: and the logical drives will follow behind
them!

This really causes some havoc for software under DOS seeing the drives
in one order...and OS/2 putting them in another.  Is this to be

expected?  I would hope that the SCSI disks would be placed AFTER all
the RLL drives are noticed.

My only solution is to put ONE and ONLY one partition on each disk.
This will give me nowhere to work with HPFS disks and really causes
some headaches if I install Windows software on one drive under DOS
and call it up from another under OS/2.  What will happen if I put
additional drives and/or a CD-ROM drive on the SCSI Bus?

(If the WinOS/2 3.1 release ever hits, I could go 100% OS/2, know what
I mean, nudge, nudge?)

-- 
 Lawrence (Larry) Belan ][                       lbelan@fert1.fe.psu.edu
 Computer/Telecommunications Specialist             bp3@psuvm.psu.edu (or)
 PennState - Fayette Campus                         bp3@psuvm.bitnet
 Route 119 North  Box 519                     75745.242@compuserve.com        
 Uniontown, PA  15041-0519                         (412) 430-4163
Newsgroups: comp.os.os2.misc