Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!ccicpg!felix!zemon From: barnett@steinmetz.UUCP (Bruce G Barnett) Newsgroups: comp.unix.ultrix Subject: Re: Problems with dd and large blocks on 2.0 VS II/GPX w/TK50?? Message-ID: <10286@felix.UUCP> Date: Fri, 23-Oct-87 13:58:34 EST Article-I.D.: felix.10286 Posted: Fri Oct 23 13:58:34 1987 Date-Received: Mon, 26-Oct-87 00:56:06 EST References: <9966@felix.UUCP> Sender: zemon@felix.UUCP Organization: General Electric CRD, Schenectady, NY Lines: 25 Approved: zemon@felix.UUCP Reply-Path: In article <9966@felix.UUCP> jmsellens@watdragon.waterloo.edu (John M. Sellens) writes: |I've been trying to read some TK50 dump tapes I wrote under Ultrix |1.2 with the 4.3 dump using a blocksize of 126. Under Ultrix 2.0, |it seems that dd has trouble with large block sizes | |John Sellens -- Logic Programming and Artificial Intelligence Group I had a similar problem with Ultrix 2.0 I was reading in a tape using dd and the following command dd ibs=2048 conv=unblock if=/dev/rmt0 of=file.out The files were corrupted. Actually, every character after 2048 was zero. I read the new man page on dd and tried: dd ibs=2048 conv=unblock rbuf=0 if=/dev/rmt0l of=file.out ------ - The new version of dd uses a read buffer default value of 8. Changing it to 0 seemed to fix the problem. -- Bruce G. Barnett uunet!steinmetz!barnett