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From: jupakkanen@cc.helsinki.fi
Newsgroups: comp.os.os2.misc
Subject: Re: OS/2 with AT clone, Adaptec 1542B, and SCSI drive
Message-ID: <1991May11.230118.1@cc.helsinki.fi>
Date: 11 May 91 21:01:18 GMT
References: <12966@uhccux.uhcc.Hawaii.Edu> <3899@ux.acs.umn.edu>
Sender: news@klaava.Helsinki.FI (Uutis Ankka)
Organization: University of Helsinki
Lines: 39

In article <3899@ux.acs.umn.edu>, spexet@ux.acs.umn.edu (D. Robert Spexet II) writes:
> In article <12966@uhccux.uhcc.Hawaii.Edu> tholen@uhccux.uhcc.Hawaii.Edu (David Tholen) writes:
>>David Feustel writes:
>>
>>> OS/2 doesn't work with SCSI yet. Try again in a year.
>>
>>The new IBM Model 90 and 95 have SCSI hard disks, and according to their
>>product information literature, OS/2 SE and EE versions 1.2 and 1.3
>>support these machines.
>>
>>Is anybody out there actually running OS/2 on a Model 90 or 95 so that
>>this information can be verified?
> 
> We're not running on a Model 95, but we *are* running both SCSI and ESDI
> drives on a Model 80-A31.  The SCSI and ESDI drives, along with their control-
> lers, are standard IBM equipment, and are on the educational pricing schedules.
> 
> We run this machine for our lab's file server, running IBM LAN Server software.
> 
> OS/2 EE version 1.2 ran fine on this machine, and I am happy to say that ver-
> sion 1.3 of the OS/2 EE software runs fine also.
> 
> So, I can say that IBM's version of OS/2 supports IBM SCSI and ESDI control-
> lers just fine.  (We have a 115-meg ESDI drive and a 320-meg SCSI drive at-
> tached to the machine.)  The question that people would like answered, however,
> is whether or not IBM's version of OS/2 will support non-IBM disk drives and
> their related controllers.
> 
> -Dennis

With DPT's SmartConnex and SmartCache (+) controllers you have the
WD1003 emulation mode when you don't need drivers for any operating
system or version. But there is a performance panalty of course. With the
PM2012A/95 EISA/SCSI controller I 'only' get 4MB/s transfer rate with
the Wren Runner-2 in WD1003 emulation mode. The latest high performance
EATA-mode driver at the moment is for 1.21 (OS/2), which supports bus
mastering, 33MB/s transfers (EISA), etc..
 
Jukka