paul@csnz.co.nz (Paul Gillingwater) (09/18/89)
Hi, We just installed a 150 Mb Mountain tape drive as an upgrade to a 60 Mb tape drive into a customer site running SCO Xenix. Then we found out that they regularly exchange tapes with other sites who still have 60 Mb drives -- only now they can't. Obviously one cannot read an XTD cartridge in a low density drive, so we tried a standard DC600A. The FM says that ordinary DC600's can be used, but they're formatted in double density, to achieve 120 Mb capacity. Does anyone know a way of forcing tar or the drive itself to use only 60 Mb, so that it can be read by an ordinary 60 Mb drive? echo "thanks" >/dev/advance -- Paul Gillingwater, Computer Sciences of New Zealand Limited Domain: paul@csnz.co.nz Bang: uunet!vuwcomp!dsiramd!csnz!paul Call Magic Tower BBS V21/23/22/22bis 24 hrs NZ+64 4 767 326 SpringBoard BBS for Greenies! V22/22bis/HST NZ+64 4 767 742
bote@csense.UUCP (John Boteler) (09/21/89)
From article <114@csnz.co.nz>, by paul@csnz.co.nz (Paul Gillingwater): > Hi, > in a low density drive, so we tried a standard DC600A. The FM says that > ordinary DC600's can be used, but they're formatted in double density, > to achieve 120 Mb capacity. Does anyone know a way of forcing tar or While your brains are on the subject, just what is the difference between the 600, 600XL and 600A tapes? I understand that they each provide a different capacity, but since the SCO system I have seen operate on them does not format them, what is the determining factor? Is there a rule of thumb (you know, like a standard :) -- Bote Old & Improved path!: uunet!comsea!csense!bote New & Improved path!: {zardoz|uunet!tgate|cos!}ka3ovk!media!cyclops!csense!bote
fyl@ssc.UUCP (Phil Hughes) (09/24/89)
In article <367@csense.UUCP>, bote@csense.UUCP (John Boteler) writes: > While your brains are on the subject, just what is the difference > between the 600, 600XL and 600A tapes? The following is from a news file we keep on our system. It isn't all the answers but it is a start. QIC (Quarter Inch Cartridge) "buzz-numbers" Yes, there are more but this is what I know today. QIC-02 The interface from the drive to a controller. This is the usual one for most AT buss controllers. This has nothing to do with the format of the tape. QIC-11 20MB, 4-track tape format. Old, not really the thing these days QIC-24 60MB, 9-track tape format. Probably the most popular today. QIC-40 40MB QIC-80 80MB QIC-120 125MB, 12-track tape format. Never was in. QIC-150 150MB, 18-track tape format. This is what will be in next year. QIC-320 320MB QIC-??? 1G-byte, 30 tracks at 51,667 bpi (still under devel 5-89) Tape drives: Archive is the most popular manufacturer. Their Viper series is "in". 2150S is a QIC-150 drive with SCSI buss interface The Tapes that these animals use: DC-300 Used for QIC-24 DC-600A Used for QIC-120 DC-600XTD Used for QIC-150 DC-615 New name for DC-600XTD -- Phil Hughes, SSC, Inc. P.O. Box 55549, Seattle, WA 98155 (206)FOR-UNIX amc-gw!ssc!fyl or uunet!pilchuck!ssc!fyl or attmail!ssc!fyl