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- Newsgroups: comp.os.os2.misc
- Path: sparky!uunet!cs.utexas.edu!csc.ti.com!tilde.csc.ti.com!mksol!mccall
- From: mccall@mksol.dseg.ti.com (fred j mccall 575-3539)
- Subject: Re: OS/2 and SCSI
- Message-ID: <1992Jul30.174240.13771@mksol.dseg.ti.com>
- Organization: Texas Instruments Inc
- References: <rick.19.712447261@sjsumcs.sjsu.edu> <1992Jul30.140855.219272@cs.cmu.edu>
- Date: Thu, 30 Jul 1992 17:42:40 GMT
- Lines: 78
-
- In <1992Jul30.140855.219272@cs.cmu.edu> jc70@westend.VI.CMU.EDU (Joo C. Chung) writes:
-
- >In article <rick.19.712447261@sjsumcs.sjsu.edu> rick@sjsumcs.sjsu.edu (Richard
- >M. Warner) writes:
- >> In article <anderson.13.712329957@mayo.edu> anderson@mayo.edu (Alfred I.
- >Anderson) writes:
- >> >From: anderson@mayo.edu (Alfred I. Anderson)
- >> >Subject: Re: OS/2 and SCSI
- >> >Date: 28 Jul 92 13:25:57 GMT
- >>
- >> >In article <1992Jul27.134503.23338@src.umd.edu> chad@src.umd.edu (R Michael
- >McMahon) writes:
- >> >>From: chad@src.umd.edu (R Michael McMahon)
- >> >>Subject: OS/2 and SCSI
- >> >>Date: Mon, 27 Jul 1992 13:45:03 GMT
- >>
- >>
- >> >>I have Unix on my PC. Out of curiosity, I got OS/2 2.0 and installed it
- >> >>(all 15 disks!) on my 386/7 33Mhz machine with an Adaptec 1542 SCSI
- >> >>controller. The disk performance is absolutely unbearable: it sounds
- >> >>like OS/2 is reading one byte at a time from the disk. I believe this
- >> >>is caused by the SCSI setup. Has anyone managed to achieve usable drive
- >> >>performance in a SCSI system???
- >>
- >> >>I won't use or recommend OS/2 if thats the best it can do.
- >>
- >> >>R Michael McMahon chad@src.umd.edu
- >>
- >>
- >>
- >> >Perhaps someone can shed some light on this problem you're having. I'd be
- >> >interested too. I wanted to get a 486 clone with a SCSI adapter to use with
- >> >OS/2 Ver 2. I was told that was a bad idea because IBM does not have a "
- >> >virtualized SCSI driver". I was told to get an IDE disk.
- >>
- >> >Anyone know why?
- >>
- >> I'll bite. Actually, me and my office partner are both running OS/2
- >> on 486's with SCSI disk systems (Adaptec controllers, Maxtor drives)
- >> and have not had any problems so far.
- >>
- >> >^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- >> >Alfred Anderson Internet: anderson@Mayo.edu
- >> >Mayo Foundation - Rochester MN 55905
- >>
- >> >NOTE: PLEASE INCLUDE YOUR RETURN ADDRESS IN THE BODY OR .SIG FILE
- >> >OF ANY NOTE SENT TO ME --- THE SOFTWARE ON MY END DOES NOT PASS
- >> >YOUR RETURN ADDRESS FROM THE MESSAGE HEADER TO ME!
- >> >-----------------------------------------------------------------
-
- >I have not problems using OS/2 with Adaptec SCSI controllers. I'm using OS/2 on
- >2 machines with SCSI controllers. One is a PS/2 with the Adaptec 1640 and the
- >other is a Dell with a 1542. The Dell is a 486/50 and it screams! The PS/2 has
- >an internal 60 meg hard drive and an external 213MB scsi hard drive. The
- >external drive is about 2-3 times faster than the internal.
-
- The following is from memory. It may be incorrect in detail, but I
- believe that it is essential correct in broad.
-
- I believe the problem is with how the 1542 is set up. 'Out of the
- box' behaviour has the timing between the hard and floppy disks set in
- such a way that the OS/2 installation fails. This leads to all the
- disk thrashing, etc. I think you can change the timing on the 1542 by
- changing some jumpers on the controller, but I can't state that with
- certainty because I don't have this kind of card.
-
- However, I have run OS/2 on my machine at home, which is a 486-50 EISA
- with an Adaptec 1740 and a Maxtor 1.2G SCSI drive. Works like a hose.
- My only problem with OS/2 is that the video (or actually, the WPS)
- still feels gawdawful slow.
-
- [That and not having a seamless 1024x768x256 ET-4000 driver.]
-
- --
- "Insisting on perfect safety is for people who don't have the balls to live
- in the real world." -- Mary Shafer, NASA Ames Dryden
- ------------------------------------------------------------------------------
- Fred.McCall@dseg.ti.com - I don't speak for others and they don't speak for me.
-