Organization: National Radio Astronomy Observatory, Socorro NM
References: <1992Sep4.120414.5823@zoo.bt.co.uk>
Date: Tue, 8 Sep 92 21:23:19 GMT
Lines: 23
In article <1992Sep4.120414.5823@zoo.bt.co.uk> gah@zoo.bt.co.uk writes:
>
>Does anyone know how to do incremental dumps to tape using tar or similar? I know that tar has an option to do incrementals, but it is not (apparently) supported to the 8mm tape drives.
Not using u or r, but you can append another tar file at the end of the tape.
Use "mt -f /dev/nrst0 eom" to skip to the end of recorded media, then start
writing a new tar file. Note that you must use the nonrewinding device name
for the tape, otherwise it will rewind as soon as it has finished skipping.
Ordinary tar does not have an option to do incrementals, at least not one that
is described in the 4.1.2 man page. GNU tar does, but I don't know much about
it.
>I have been using dump, but I need to be more specific about the directories backed up than just the raw device.
As of some version around SunOS 4.1.1, dump accepts file/directory names as
well as partition device names/mount points. So you can keep using dump if
you prefer it. Remember that there are some file types tar cannot handle
(special files such as sockets and devices; don't know how GNU tar handles
