On Sat, 23 Jan 2010, A. Krijgsman wrote:
Just to jump in.
Did you guys ever consider to shortstroke a larger sata disk?
I'm not familiar with this, but read a lot about it;
Since the drive cache gets larger on the bigger drives.
Bringing back a disk to roughly 25% of its capicity would give better cache
ratio and less seektime.
Consider that a drive cache may be 16MB but the ZFS ARC cache can span
up to 128GB of RAM in current servers, or much larger if SSDs are used
to add a L2ARC. It seems to me that once the drive cache is large
enough to contain a full drive track, that it is big enough. Perhaps
a large drive cache may help with write performance. GB beats MB any
day of the week.
So 2TB would become 500GB, but better then a normal 500GB SATA.
( Or in your case, swing it down to 750Gb )
Or you could buy a smaller enterprise drive which is short-stroked by
design.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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