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- From: tony@uqcspe.oz.au (Tony O'Hagan)
-
- Last year I wrote an off-line tape archive system for use on our UNIX
- machines. Tar and cpio were carefully compared to decide the appropiate
- format for the tape archives. Eventually we chose cpio because it permitted
- retrieval of any pattern of files.
-
- About 120+ cpio files are stored on each archive tape and from bitter
- experience I know that sometimes when appending/retrieving files to/from tape
- an insufficient number of files are skipped. (We count them using taprd now)
- It would have been useful to write a "file label" included in the header
- of each cpio file and be able to check this when reading. I would have used it
- to check the file number but I'm sure it would have other uses.
- ( I would skip to the file before and check it's label when appending. )
-
- I recently adapted the archive system from V7 to BSD 4.2 and added the
- facility to drive remote tape drives using the blocking filters which fitted
- in well with cpio.
-
- [ These are useful points, though they are not problems with the data
- interchange format, rather with the program that uses it. -mod ]
-
- P.S.
- There are a few other bugs in cpio which I had to fix for the local version.
- * creating new otherwise unstored directories with the current
- mask (not mode 777). (with -d switch)
- * not changing the ownership/group/permissions of existing
- directories back to their values at the time of archiving.
- ==============================================================================
- Tony O'Hagan Australia: (07) 3774125 International: +61 7 3774125
- University of Queensland CSNET: tony@uqcspe.oz ACSnet: tony@uqcspe.oz
- Dept. of Computer Science UUCP: ...!seismo!munnari!uqcspe.oz!tony
- St. Lucia, Brisbane, ARPA: tony%uqcspe.oz@seismo.css.gov
- AUSTRALIA 4067 JANET: uqcspe.oz!tony@ukc
-
- Volume-Number: Volume 11, Number 42
-
-