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Path: utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!mcnc!ncsu!uvacs!edison!steinmetz!davidsen
From: davidsen@steinmetz.UUCP (Davidsen)
Newsgroups: net.micro,net.unix,net.micro.att
Subject: Interchanging data between PC based unices
Message-ID: <768@steinmetz.UUCP>
Date: Fri, 23-May-86 15:52:12 EDT
Article-I.D.: steinmet.768
Posted: Fri May 23 15:52:12 1986
Date-Received: Fri, 30-May-86 08:37:06 EDT
References: <191@erc3ba.UUCP> <10000001@eel>
Reply-To: davidsen@kbsvax.UUCP (Davidsen)
Organization: GE CRD, Schenectady, NY
Lines: 44
Xref: watmath net.micro:14740 net.unix:7993 net.micro.att:1231

In article <10000001@eel> lee@eel writes:
>
>Which of the many formats of diskette that PC/IX is capable of writing do
>you have?  Aside from the standard 8/9 sectors 1/2 sides variations, there
>are several software variations available:

A cpio disk written on a 9 sector disk with the option "-oBc" may be read
and written by PC/IX, Xenix all versions SysIII and SysV, and the RT/PC.
In addition, a single volume cpio disk may be interchanged between these
machines and the AT&T 7300 as follows.

The 7300 uses a disk with 8 sectors per track and the first 8 sectors
reserved. To move data from 7300=>intel use the magic "-oBc" option, and
read it as follows:
	dd ibs=8*512 skip=1 </dev/rfd048ds8 | cpio -iBcdmlv
				     ^or 1             ^^^^
							|
					use your favorite options

To go intel=>7300, first format the disk on the 7300, then write it using
the command:
	something | cpio -oBc | dd obs=8*512 seek=1 >/dev/rfd048ds8

I have been doing a lot of Xenix/286 to 7300, and wrote a pair of programs
which will write (and format) or read multi-disk 7300 files on Xenix/286,
using standard in/out. Example:
	find . -print | cpio -oBc | 7300rite /dev/rfd148ds8
will write an entire directory to a series of disks which I can read on
the 7300. The command:
	7300read /dev/rfd148ds8 | cpio -iBc
will restore a series of disk written on the 7300 (to /dev/rfp021).

I'm looking at Altos now, a trifle complicated with the 8" disks and all,
I have to go through another machine.
-- 
	-bill davidsen

  ihnp4!seismo!rochester!steinmetz!--\
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         sixhub ---------------------/        (davidsen@ge-crd.ARPA)

"Stupidity, like virtue, is its own reward"