On Tuesday 26 October 2004 17:14, Joe Rhett wrote:
>> On Monday 25 October 2004 17:53, Joe Rhett wrote:
>> >In particular, the alpha documentation for amanda indicates that
>> > amanda will move on to the next tape for EOT -- this apparently
>> > isn't true at all.
>> >
>> >11.3.2 End of tape handling
>> >As in earlier versions of AMANDA, taper itself does not try to
>> > restrict writing to the tape size given in the config file. It
>> > relied on planner having correctly estimated backup sizes and
>> > limiting itself to what would fit on one tape.
>> >
>> >Now, taper needs to switch to a new tape when the current tape
>> > has filled up. The tape is considered full when taper gets a
>> > write error. This will most likely occur in the middle of
>> > writing a (potentially large) backup file, perhaps even from a
>> > direct-to-tape socket, so there is no possibility of starting
>> > the backup file over again on the next tape, it must start from
>> > where it left off, rewriting the block that got the error on the
>> > next tape.
>> >
>> > To insure correct operation, the file header of the continued
>> > file should contain an indication that it is a continuation, and
>> > at what offset. amrestore of course needs to be aware of this
>> > scheme and handle it correctly, perhaps by double-buffering
>> > internally.
>>
>> If the file cannot be restarted from byte 1 on the next tape, eg
>> the system cannot back up to the start of the file being written,
>> then something is seriously wrong with the method being used.  In
>> the case of no holding disk, then it seems setting one up would be
>> the answer.
>>
>> In no event will amanda actually "continue" a file on the next
>> tape, its a basic design decision, and while there have been some
>> patches available from 3rd parties to do this, I'm certainly not
>> privy to any discussions as to the feasability of incorporating
>> such a bug/feature into an actual amanda distribution.  And the
>> dual labeling of such a method above is 100% intentional.
>
>So can you please reconcile your statement and the documentation
> above? Or take an action item to update the documentation if it is
> wrong?

Unforch, I don't have access to the documentation, nor do I read the 
code so well that I could write correct docs from it.  I suspect that 
Stefan W. might be the one to ping on this.

-- 
Cheers, Gene
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Copyright 2004 by Maurice Eugene Heskett, all rights reserved.