Subject: Re: dump and FileSystem Buffer Cache
To: Louis Guillaume <lguillaume@berklee.edu>
From: Hauke Fath <hf@spg.tu-darmstadt.de>
List: netbsd-users
Date: 03/10/2005 11:00:14
Am 09.03.2005 um 18:53 Uhr -0500 schrieb Louis Guillaume:
>Basically the issue is that, when dump-ing a mounted, active
>filesystem, there are still data in the kernel's filesystem buffer
>cache that havent't yet been sync'd to the disk. Since dump reads
>from the block device,
s/block device/raw device/
>and these data are not available except through the filesystem, bad
>dumps can occur.
Same with tar when applications change files under its hands - in
both cases you want to make sure you are backing up a quiet
file-system.
hauke
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