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From: tim@ncrcan.Canada.NCR.CA (tim)
Newsgroups: comp.sys.ncr
Subject: Re: Pcdsk on SCSI flex
Keywords: pcdsk SCSI
Message-ID: <3794@ncrcan.Canada.NCR.CA>
Date: 3 Apr 91 16:21:54 GMT
References: <1991Mar19.005953.15726@pilikia.pegasus.com>
Reply-To: tim.nelson@canada.ncr.com
Organization: NCR Canada Ltd. Mississauga, Ontario
Lines: 78

In article <1991Mar19.005953.15726@pilikia.pegasus.com> art@pilikia.pegasus.com (Art Neilson) writes:
>We have a problem writing to our SCSI 5.25 flex via pcdsk(1).  I realize
>pcdsk is an unsupported utility, this means we are SOL if NCR doesn't
>know of an answer offhand.  Pcdsk works just fine on MSC based flex drives,
>however it does not work for SMSC and HPMSC (SCSI) based flex drives.  On
>our Tower 32/650 in the /etc/RELDEF directory, the following text can be
>found in the file 3.00.00.rd:

[ stuff deleted ]

>Hmmmm. the nodes mentioned here yeild no joy when created with mknod(1),
>pcdsk complains that it can't open /dev/pcdsk/h2s9.  I do know of some
>nodes that work, they are as follows:
>
>      /dev/pcdsk/h2s8  major no. 64, minor no. 200
>      /dev/pcdsk/h2s9  major no. 64, minor no. 204
>
[ more stuff deleted ]

Here is the file which I used on a 450, with a SCSI flex.

I found that the "utm" will sometimes core dump when copying several
files at a time.  The solution to this is to do a "dir" as the first
command after pcdsk has been run, then do the "utm".

---cut-here----------------------------------------------------------
#	Copyright 1988 NCR Corporation - Dayton, Ohio, USA
#	@(#)cmd/pcdsk:pcnodes.sh	1.1 
#
# Shellscript to make device nodes to recognize PC disks.

echo "Making device nodes for PC disks"
if [ ! -d /dev/pcdsk ] 
then
	echo "Creating directory '/dev/pcdsk' to contain device nodes"
	mkdir	/dev/pcdsk
	chmod	755 /dev/pcdsk
fi

echo "Raw PC -- 40 tracks, 1 side, 8 sectors per track ...  /dev/pcdsk/h1s8"
/etc/mknod /dev/pcdsk/h1s8 b 2 162
chmod	666 /dev/pcdsk/h1s8

echo "Raw PC -- 40 tracks, 1 side, 9 sectors per track ...  /dev/pcdsk/h1s9"
/etc/mknod /dev/pcdsk/h1s9 b 2 178
chmod	666 /dev/pcdsk/h1s9

echo "Raw PC -- 40 tracks, 2 sides, 8 sectors per track ...  /dev/pcdsk/h2s8"
/etc/mknod /dev/pcdsk/h2s8 b 2 34
chmod	666 /dev/pcdsk/h2s8

echo "Raw PC -- 40 tracks, 2 sides, 9 sectors per track ...  /dev/pcdsk/h2s9"
/etc/mknod /dev/pcdsk/h2s9 b 2 50
chmod	666 /dev/pcdsk/h2s9


echo "Raw PC -- 80 tracks, 1 side, 8 sectors per track ...  /dev/pcdsk/t80h1s8"
/etc/mknod /dev/pcdsk/t80h1s8 b 2 130
chmod	666 /dev/pcdsk/t80h1s8

echo "Raw PC -- 80 tracks, 1 side, 9 sectors per track ...  /dev/pcdsk/t80h1s9"
/etc/mknod /dev/pcdsk/t80h1s9 b 2 146
chmod	666 /dev/pcdsk/t80h1s9

echo "Raw PC -- 80 tracks, 2 sides, 8 sectors per track ...  /dev/pcdsk/t80h2s8"
/etc/mknod /dev/pcdsk/t80h2s8 b 2 2
chmod	666 /dev/pcdsk/t80h2s8

echo "Raw PC -- 80 tracks, 2 sides, 9 sectors per track ...  /dev/pcdsk/t80h2s9"
/etc/mknod /dev/pcdsk/t80h2s9 b 2 18
chmod	666 /dev/pcdsk/t80h2s9

ls -ls /dev/pcdsk/*
---cut-here----------------------------------------------------------
 
-- 
Tim.Nelson@Canada.NCR.COM  - or - Tim.Nelson@Canada.NCR.CA
NCR Canada, Customer Support Services (416) 819-4112