Path: utzoo!censor!geac!torsqnt!lethe!yunexus!ists!helios.physics.utoronto.ca!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!usc!wuarchive!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnewsl!hojo From: hojo@cbnewsl.att.com (HC Johnson) Newsgroups: comp.sys.atari.st Subject: Re: Tape Mechanism Summary: Comments on CT backups Message-ID: <1991Jan24.154030.1537@cbnewsl.att.com> Date: 24 Jan 91 15:40:30 GMT References: <1991Jan19.021429.2157@mailer.cc.fsu.edu> <1991Jan23.141953.16793@d.cs.okstate.edu> Organization: AT&T Bell Laboratories Lines: 51 In article <1991Jan23.141953.16793@d.cs.okstate.edu>, cummins@d.cs.okstate.edu (John Cummins) writes: > > Okay... some more questions... I need software that will backup > > 1) Specific file extensions from a list of partitions > (say all *.arc and *.lzh filed from drive d: and e:) > > 2) Backup only specific subdirectories... > (the BBS subdirectories on drives g: and h:) > > 3) handle incremental backups, appending them to the tape backup the incremental > is incremental to... (I guess appending to the tape in the drive is what > i really mean...) > > 4) I really would like to do IMAGE backups as the restore of a partition > should be swift that way... but file backups as above are nice... > > 5) Can I still backup my Spectre partition w/o ICDs software???? > This is how I do these 5 things. 1. and 2. I use FIND (posted long ago) to identify files and groups and CPIO corrupted from the UNIX specs, with a CT driver embedded. Really, about all that I use this for is to exchange data with UNIX systems. 3. According to the specs, you cannot APPEND to a CT. In fact, the Adaptec 3530 interface enforces that. Simply put, you cannot write after a read. This does not prevent putting multiple files on one tape: it just has to be done as one continuous set of write calls. 4, and 5. This is my main use for CT. I build a list of partitions from a drive (not necessarily contiguous) and output them as files to a CT. Any partition works: TOS, MINIX, Spectre, as long as they show in Sector 0 of the hard disk. A TOS partition, that has been saved on a CT can be read and interpreted to retrieve files. I hacked up the MINIX tos.c command to do this. It is of much less use that just overlaying a partition with the CT file and sucking out the wanted files. This works best if the CT can be selectively read into any partition on and disk. My program does this; if you write your own, remember to limit the transfer by the size of the receiving partition! Howard Johnson ATT BELL LABS att!lzsc!hcj hcj@lzsc.att.com