support quality (Re: dump | restore fails: unknown tape header
peterjeremy at optushome.com.au
Thu Mar 26 02:37:02 PDT 2009
On 2009-Mar-25 19:25:28 +1030, Daniel O'Connor <doconnor at gsoft.com.au> wrote:
>One other thing would be to make absolutely sure that your version of dump &
>restore are in sync, the are very machine/version dependent.
Actually, they aren't - the archive format is very stable. (This is a
fairly important requirement - you don't want to suddenly be unable to
restore your backups after an upgrade). I can restore dumps made on
FreeBSD4.8/i386 and FreeBSD4.9/alpha on a FreeBSD-current/amd64 system
It's possible that you might have problems with a backup made using a
very recent dump on a very old restore if you've used filesystem
features that didn't exist when that restore was built.
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