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DateFri, 09 Jun 2006 11:44:56 -0400
FromJeff Garzik <>
SubjectRe: [Ext2-devel] [RFC 0/13] extents and 48bit ext3
Alex Tomas wrote:
>  JG> "ext3" will become more and more meaningless.  It could mean _any_ of 
>  JG> several filesystem metadata variants, and the admin will have no clue 
>  JG> which variant they are talking to until they try to mount the blkdev 
>  JG> (and possibly fail the mount).
> 
> debugfs <dev> -R stats | grep features ?

The question is, do you

a) expect users to run this magic command, and DTRT or

b) watch users boot w/ extents, accidentally do something silly like 
writing data to a file, and become locked into a new subset of kernels?

The simple act of writing data to a file has become an _irrevocable 
filesystem upgrade event_.

	Jeff



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