Subject: Re: dump and FileSystem Buffer Cache
To: Louis Guillaume <>
From: Hauke Fath <>
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 


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