jrt@aeg.dsto.oz.au (J.R.Terry-AEG) (12/01/90)
I would greatly appreciate it if anyone can help with information regarding IBM CMS Tape Dump format. What I have so far is: 1. Tape file comprises data blocks (max length 4101 bytes) interspersed with some sort of information block (presumably 1 for each file dumped on the tape) of exactly 87 bytes. 2. Data blocks have ^BCMSF in EBCDIC (hex 02 C3 D4 E2 C6) in the first 5 bytes followed by up to 4096 bytes of data organised as 80 column card images. The data bytes are also EBCDIC encoded. 3. Information blocks have ^BCMSN in EBCDIC (hex 02 C3 D4 E2 D5) in the first 5 bytes then 82 bytes of what I presume to be directory type information (file name, size, date, etc.) 4. I would like to know how the data in these ^CMSN blocks is interpreted so I can reconstruct the files that have been dumped. 5. No. I don't have an IBM mainframe with the VM operating system on it, which I am told is what would have produced the tapes in the first place. 6. If in addition, anyone knows of a utility for SUN or VAX platform that will process this tape format, I would also be interested. Many thanks to anyone who responds by E-Mail preferably or to this group if appropriate. JRT -- John R Terry jrt@aeg.dsto.oz.au Head, Avionic Computer Systems Ph: +61 8 259 6982 Aeronautical Research Laboratory, DSTO Salisbury Fax:+61 8 259 5507