I wrote:
> For example, mkfs, fsck, and chmod -R would involve seeks
>entirely within the metadata partition, which might be 5% the size of
>the data partition. [...] so reducing this average seek distance
>[by a factor of 20] when
>metadata operations follow each other would reduce average disk arm
>motion time by a factor of almost 4.5, although rotational delays
>would be unaffected.
Before anyone jumps of me for a seemingly wild claim, I want to
clarify that I understand that metadata in file systems like bsd-ffs,
ext2 and ext3 is already grouped together in cylinder groups. It is
just the presumably less frequent seeks between metadata in different
cylinder groups that I expect would be improved in this manner.
Adam Richter
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