[linux-lvm] dm chunk size is 512?

[Jason Smith]

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I modified lvm2 to display the snapshot chunks used from device-mapper, but 
it's reporting them in 512-byte units (just saw 204800 for a 100mb volume).

My question is, is this supposed to be static (it's from dm proper, not lvm2) 
at that size?  Does lvcreate -s -c <size> change anything?  It would be great 
to force the size for device-mapper snapshot volumes, since dm currently 
thrashes a software raid 5 array during snapshots.

Thanks.

- -- 
Jason Smith
Open Enterprise Systems
Bangkok, Thailand
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