I just thought I'd editorialize here for a second on the benefits of dump
because I think we should all feel lucky to have it.
1. It is true that you have to tell dump a really big lie for the length
of the tape. A 120m 4mm dat has an effective length of 44000 feet because
of the funny way that the drive writes on the tape.
2. Operation is truly simple. If you don't mind making full backups
every time, then cpio and tar are very viable. I just found them to be
a real research project to get incremental backups. The value of
incrementals is that you don't wear out your tape head as quick.
3. restore -i can't be beat!
4. The other thing I like is that dump 0 operates below the filesystem,
i.e., at the same level as fdb. If you restore from tape, you literally
get a mirror image of what you stated with. All files even end up with the
same inodes!
And one final note. The dump that we have on Linux will *not* work with
multiple volumes. That's why it's important that you don't run over.
From: Vidiot <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Sunday, May 17, 1998 4:13 AM
Subject: dump and T3000 drive
>But, when using dump, there are two values that I don't know; density and
>size. The blocks I obtained fro the HOWTO: 58. I have them set real high
>at this point. If you use the T3000 and dump, please let me know what
>values you use.
Unless you're relying upon dump's estimates of tape capacity (which you
shouldn't, because they're just guesses if you're using compression) you can
put really huge lies in there and it will work perfectly.
If your lies are too small, dump may prompt for a new tape before the old
one is full.
So you make them huge, and there's not a problem unless your tape drive
doesn't detect end-of-tape properly.
That's really what they're for; to end a dump before tape runs out, so you
don't walk into the machine room and find a big reel ripped to shreds from
going around and around after it reached the end.
Doesn't matter with modern tapes. dump is really old. :-)
-Time flies like the wind. Fruit flies like a banana. [EMAIL PROTECTED]
-Stranger things have happened but none stranger than this. Steven W. Orr-
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-------divided by zero. Listen to me! We are all individuals!---------
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