dump/restore

[mcneill]

In article <12433 at steinmetz.ge.com>, davidsen at steinmetz.ge.com (William E. Davidsen Jr) writes:
> In article <178 at celerity.UUCP> billd at celerity.UUCP (Bill Davidson) writes:
> | I am trying to write tapes from Microport System V/AT (80286 yech!) and
> | I would like to use a format which can be read by BSD 4.3's dump/restore
> | programs (so that I can read my backups from a real computer).  I have
> | the source for dump/restore on Berkeley but it's very much bound to the
> | Berkeley file system and it appears that it would be rediculously difficult
> | to port.
> 
>   Since you're summary was "cpio is not a real backup program" I have to
> ask "why not?" I go between SysIII, SysV, micropost, xenix, Ultrix and
> SunOS using cpio, and it seems real enough for general use. If there's a
> problem you have, warn us about it.
> 

Many versions of cpio (from original AT&T code) have a bug which makes multiple volume
cpio's unreliable.  Many times I have tried to restore multi-volume cpio archives 
without success.  The error occurs when you switch tapes.  Cpio sometimes does not
correctly write the info needed to switch to the next archive tape.








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