From: David du Colombier <0intro@gmail.com>
To: 9fans@9fans.net
Subject: Re: [9fans] venti backup
Date: Fri, 20 Jan 2012 23:39:11 +0100 [thread overview]
Message-ID: <20120120233911.6ba91fec@gmail.com> (raw)
In-Reply-To: <CAFo14L1Kb0A=SMN9woVeKf37-JYL=oKg0HVxdBwkOc=ENz+c7Q@mail.gmail.com>
> Does the presence of the trailer imply that I should add an extra
> block to the arenas backup?
> If my last arena is
>
> arena='arenas059' [31676186624,32213057536)
>
> then I should backup 32213057536+8192 bytes instead of 32213057536?
No, the trailer is located at the end of the arena,
just after clump info.
The second number you see is the start of the next arena.
It is preceded by two blocks:
- the arena header of the next arena,
- the arena trailer of the precedent arena.
32213057536/8192 = 3932258
In you example, arenas060 start at 3932258, so the header of
arenas060 is 3932257 and the trailer of arenas059 is 3932256.
You should really backup from 1048576-8192 (start of arenas00,
including header) to 32213057536-2*8192 (end of arenas059,
including trailer).
Like many Venti tools, checkarenas check each arena header
and trailer and verify they match. So you should be confident.
--
David du Colombier
next prev parent reply other threads:[~2012-01-20 22:39 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-17 12:34 hugo rivera
2012-01-17 13:02 ` Steve Simon
2012-01-17 13:14 ` hugo rivera
2012-01-17 13:04 ` David du Colombier
2012-01-19 16:11 ` hugo rivera
2012-01-19 16:45 ` David du Colombier
2012-01-19 23:04 ` David du Colombier
2012-01-20 11:03 ` hugo rivera
2012-01-20 15:02 ` David du Colombier
2012-01-20 17:04 ` hugo rivera
2012-01-20 18:19 ` David du Colombier
2012-01-20 19:10 ` hugo rivera
2012-01-20 22:39 ` David du Colombier [this message]
2012-01-23 10:28 ` hugo rivera
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