rds95@leah.Albany.Edu (Robert Seals) (07/09/88)
Hi gang,
Here's one... either I'm being real stupid (probably) or something
is strangly missing in Unix tape facilites (gosh).
I want to put several files on a tape, each separated with file marks.
--------------------------------------------------------
|BOT| file1 |FM| file2 |FM| ..... |EOT|
---------------------------------------------------------
How?
robgwyn@brl-smoke.ARPA (Doug Gwyn ) (07/09/88)
In article <755@leah.Albany.Edu> rds95@leah.Albany.Edu (Robert Seals) writes: >I want to put several files on a tape, each separated with file marks. Use the non-rewinding minor device for all but the last file. E.g. dd if=file1 of=/dev/rmt12 bs=2k dd if=file2 of=/dev/rmt12 bs=2k ... dd if=fileN of=/dev/rmt8 bs=2k The exact names for the device depend on your system.
larry@sgistl.SGI.COM (Larry Autry) (07/10/88)
In article <755@leah.Albany.Edu>, rds95@leah.Albany.Edu (Robert Seals) writes: > > Here's one... either I'm being real stupid (probably) or something > is strangly missing in Unix tape facilites (gosh). > I want to put several files on a tape, each separated with file marks. > -------------------------------------------------------- > |BOT| file1 |FM| file2 |FM| ..... |EOT| > --------------------------------------------------------- > How? > rob Using tar, use the norewind tape device driver. Same with cpio. tar example mt rew tar cv2 file.ext tar cv2 file2.ext tar cv2 file3.ext mt rew To access these files use 'mt fsf n' where 'n' = file number minus one. cpio example mt rew cpio -ovh2 file.ext cpio -ovh2 file2.ext cpio -ovh2 file3.ext mt rew To position these files use 'mt fsf n' where 'n' = file number minus one. If 'mt' is not available on your system. Read over the file not needed with the 't' option instead of the 'x' in 'tar' or the 'i' in 'cpio'. example tar tv2 or cpio ivht2 Then to read the files: tar xv2 or cpio -ivhmud2 -- Larry Autry larry@sgistl.sgi.com or {ucbvax,sun,ames,pyramid,decwrl}!sgi!sgistl!larry
jfh@rpp386.UUCP (John F. Haugh II) (07/10/88)
In article <755@leah.Albany.Edu> rds95@leah.Albany.Edu (Robert Seals) writes: >Here's one... either I'm being real stupid (probably) or something >is strangly missing in Unix tape facilites (gosh). > >I want to put several files on a tape, each separated with file marks. > >-------------------------------------------------------- >|BOT| file1 |FM| file2 |FM| ..... |EOT| >--------------------------------------------------------- you need to use the no-rewind on close device. you create the first file using whatever, cp or cat works just fine. then, after you have copied the first file, then the tape is closed, you will have a file with a EOT mark after it. opening the tape again and copying another file, without rewind the tape first, should produce a tape with two files separated by a file mark and ending with an EOT mark. file marks and EOT marks are just collections of tape marks. one tape mark separates a block from the next one. two tape marks, which produces a zero lenght block, and in the unix idiom the eof of file, is a file mark. three tape marks gives you the EOT mark. - john. -- John F. Haugh II +--------- Cute Chocolate Quote --------- HASA, "S" Division | "USENET should not be confused with UUCP: killer!rpp386!jfh | something that matters, like CHOCOLATE" DOMAIN: jfh@rpp386.uucp | -- with my apologizes