Subject: dump and FileSystem Buffer Cache
To: NetBSD Users <>
From: Louis Guillaume <>
List: netbsd-users
Date: 03/09/2005 18:53:45
Hi Everyone,

I was recently reading an article...

... referencing a discussion from 2001 where Linus Torvalds was heavily 
critisizing the dump command.

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, and these data are not available except through the filesystem, 
bad dumps can occur.

Is NetBSD in some way immune to this kind of thing?

What are the alternatives?