.LZ compression??

From: Ward Donald Griffiths III <gram_at_cnct.com>
Date: Thu Mar 19 01:58:10 1998

Seth J. Morabito wrote:

> To make a long story short, I found some _very_ interesting looking
> stuff in the 'incoming' directory. Apparently tar will happily tar
> that up for you as well, even though you can't get into it and browse
> the files with ftp. Namely, files with names like 'RSX89A2.LZ.gz',
> 'rsx83b1.lz.gz', and 'rsx90a.lz.gz'.
>
> Are these DECUS RSX tapes in some weird '.LZ' format? Or disk images?
> I'm very much hoping they're disk images I'd be able to use with Bob
> Supnik's PDP emulator (since I, sadly, lack PDP hardware at home right
> now).
>
> Obviously, I know how to un-gzip them, but I have no idea what the '.LZ'
> extension is. It's not in the comp.compression FAQ either, that I could
> find. Anyone know what they are?

There should be some sort of Lempel-Zev de-archiver somewhere in the
library. IIRC, it started with DEC but also became popular with CP/M
and TRSDOS and other 8-bit systems (LHARC etc.). The .gz files were
simply further compression of already compressed files. I'm not a
DEC guru, but ".lzh" used to be common extension before ".arc" or
".zip".
-- 
Ward Griffiths
Dylan:  How many years must some people exist, 
			before they're allowed to be free?
WDG3rd:  If they "must" exist until they're "allowed",
			they'll never be free.
Received on Thu Mar 19 1998 - 01:58:10 GMT

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