Pedro F. Giffuni
pfgshield-freebsd at yahoo.com
Sun Jul 27 10:39:45 PDT 2008
Adam Emanuel wrote:
I'll only answer the UFS question, I don't know hammer well enough but
is somewhat like a logging fs so I don't think it can be compared at all
to a journaling fs.
1- I know that UFS divides the disk into cylinder group, does this has
anything to do with disk's physical cylinders, let's say they are the
same thing ?
This is a common misconception: it used to be (in archaic disks) that
UFS would use the cilinder information to improve performance, however
the results were so good that modern disks adopted the optimizations and
now basically hide that information. In UFS2, and late UFS1, the
"geometry" values are still used for organizational purposes but have no
relation to the physical disks at all.
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