disk devices speed is ugly

Adrian Chadd adrian at freebsd.org
Sun Feb 12 00:54:39 UTC 2012


What about the disk access is unaligned? Do you mean not sector aligned? or?

This is a common problem people face doing disk IO analysis.

The whole point about not allowing unaligned access is to make the
disk IO path cleaner. It does mean that the filesystem code (and GEOM
modules involved) need to be smarter.

If the filesystem is doing ridiculously unaligned access then it
likely should be fixed.


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