Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site phri.UUCP Path: utzoo!linus!philabs!cmcl2!seismo!harvard!talcott!panda!genrad!decvax!tektronix!uw-beaver!cornell!vax135!timeinc!phri!roy From: roy@phri.UUCP (Roy Smith) Newsgroups: net.wanted.sources Subject: Responses to 'Wanted: program to read RT-11 file systems' Message-ID: <234@phri.UUCP> Date: Fri, 17-May-85 23:25:44 EDT Article-I.D.: phri.234 Posted: Fri May 17 23:25:44 1985 Date-Received: Fri, 24-May-85 05:40:54 EDT Distribution: net Organization: Public Health Research Inst. (NY, NY) Lines: 31 Ref: <227@phri.UUCP> 1) If you have 4.2bsd, you have "arff". Console media on 780s (and 750s?) are in RT-11 format. Arff is for building new boot floppies, but handles other RT-11 disk images, too. Thanks to Scott Bradner for pointing this out. 2) There is a program called rtpip which deals with RT-11 file systems. I was offered a copy by Sohail Hussain ; presumably if you need it, you can get it from him. 3) Geoff Collyer sent me versions of rtpip, rtio, and rtdir. Says Geoff, "[...] ran at one time on v6 on the PDP-11 [...] a good chance that on the VAX you'll have to change a lot of [...] int's to [...] short's". 4) There is some confusion about RT-11 disks and tapes; they are NOT the same format. Disks (i.e. file system images, regardless of the physical media) can be read using one of the above programs. Tapes are (I think) in a format called files-11 (the same format as VMS COPY tapes?), and can be read by a variety of programs floating around the net (ansitar, f11r). I have f11r, if anybody wants it. 5) In an emergency, you can use a procedure I worked out a while ago. Since RT-11 files are stored in ascii in contiguous blocks, if you know what is (or might be) in the file you want, use "grep -b" to find one of the blocks in the file, then use "dd" to pull off the surrounding bunch of blocks and trim away the extra. Remember to strip of the trailing nulls in the last block (just reading and writing the file with ed works). -- allegra!phri!roy (Roy Smith) System Administrator, Public Health Research Institute