Xref: utzoo comp.unix.xenix:11989 comp.periphs:2942 Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!snorkelwacker!ira.uka.de!smurf!gopnbg!tmpmbx!netmbx!blume From: blume@netmbx.UUCP (Heiko Blume) Newsgroups: comp.unix.xenix,comp.periphs Subject: QIC and Xenix tapes Keywords: QIC standards, Xenix tape and tar Message-ID: <777@netmbx.UUCP> Date: 10 Jun 90 01:06:42 GMT Reply-To: daniel.d@netmbx.UUCP (Karl-Peter Huestegge) Organization: netmbx, Berlin, West Germany Lines: 96 (Please reply to 'daniel.d@netmbx'.) In the past there were a few questions and answers concerning tape standards and tar archives in comp.unix.xenix and comp.periphs (thanks for the summary, Pat_Barron). Here are two tables and a short description how to append tar files under Xenix 386GT. 1/4 " Data Cartridge Standards ============================== (QIC-11 is not an Industry Standard and there exist some incompatible versions.) Standard Capacity Tracks Speed Rec-density Flux-Trans Cartridges ---------------------------------------------------------------------------- QIC-11 15/30MB (300ft) 4/9 90ips 20/40MB (450ft) 4/9 90ips 6400ftpi DC300XL 10000ftpi DC300XLP 27/60MB (600ft) 4/9 90ips 10000ftpi DC600A QIC-24 45MB (450ft/137m) 9 90ips 8000bpi 10000ftpi 55MB (555ft/169m) 9 90ips 8000bpi 10000ftpi 60MB (600ft/183m) 9 90ips 8000bpi 10000ftpi DC600A QIC-120 125MB (600ft/183m) 15 72ips 10000bpi 12500ftpi DC600A QIC-150 155MB (600ft/183m) 18 72ips 10000bpi 12500ftpi DC600XTD DC6150 QIC-320 320MB (600ft/183m) 26 72ips 10000bpi 12500ftpi DC6320 QIC-525 525MB (1000ft/183m) 26 72ips 10000bpi 12500ftpi DC6525 Read/Write Compatibility of the Tape-Formats: --------------------------------------------- (The left column should be read: "Tape drives designed for the QIC-??? standard *should* be able to read/write the following Tape formats:".) TAPE-DRIVES | Tape - Formats | designed for: | QIC-11 | QIC-24 | QIC-120 | QIC-150 | QIC-320 | QIC-525 | ----------------|--------|--------|---------|---------|---------|---------| QIC-11 | R W | | | | | | QIC-24 | R W | R W | R | | | | QIC-120 | R - | R - | R W | R | | | QIC-150 | R - | R - | R W | R W | | | QIC-320 | R - | R - | R W | R W | R W | ? ? | QIC-525 | R | R | R W | R W | R W | R W | --------------------------------------------------------------------------- I have made some experiences with the SCSI Tape drives TDC-3660 (QIC-150) and TDC-3820 (QIC-320) of Tandberg Data under the Xenix 386GT OS 2.3.2. Both drives can read QIC-11,QIC-24,QIC-120,QIC-150, and write QIC-120 and QIC-150 Tapes. In write mode the 320MB Streamer automatically switches to QIC-320 if it 'sees' a 320 MB Cartridge (it's recognized by the holes in the tape). So you don't need another tape driver (the Xenix/Adaptec driver will do). If you 'mkdev tape', there will be created 2 devices: /dev/rct0 (linked to /dev/rmt/0b) /dev/nrct0 (linked to /dev/rmt/0bn) Both are Raw devices, ncrt0 is a non-rewinding device. You can append several tar archives if you use the non-rewinding device. For instance, you are at the beginning of tape and do a 'tar cf /dev/nrct0 ./foo1' The tape will not rewind after recording and write a filemark at the end. Then you can do another 'tar cf /dev/nrct0 ./foo2' and a 'tar cf /dev/nrct0 ./foo3'. You untar the archives by saying 'tape rewind /dev/nrct0' and do three successive 'tar xf /dev/nrct0'. If you only want to see the './foo2' archive, you say 'tape rewind /dev/nrct0' (rewind tape) and 'tape rfm /dev/nrct0' (skip next filemark) and 'tar tvf /dev/nrtc0' (list archive, don't rewind). If you ever read past the last file mark you'll get an i/o error. Instead of saying 'tar ??f /dev/nrct0' you can simply edit /etc/default/tar. Do the same for 'tape ??? /dev/nrct0' in /etc/default/tape. Hope this helps a few people. Karl-Peter Huestegge. -- Karl-Peter Huestegge | Voice: (+49 30) 8518198 Niedstr. 19 | UUCP : daniel.d@netmbx.UUCP 1 Berlin 41 | PSI : PSI%45300043109::netmbx:daniel.d