Posted by: Anonymous Coward
on October 11, 2003 10:33 PM
Hdparm, while a useful tool, is meant for something totally different. Hdparm is for setting disk parameters. In the command you give above: -d1 enables dma (direct memory access) -A1 enables read-lookahead -m16 set the multiple sector I/O to 16 (as in read 16 sectors at a time) -u1 sets interrupt-unmask -a64 sets filesystem read-ahead (essentially buffering in main memory)
These options are all related to hardware control. This article talked about filesystem performance which is a separate issue. You can have the fastest harddrive in the world and still get bad performance because you are using a filesystem that is configured all the wrong way. Usually any modern filesystem defaults to good allround settings which means they compromise and tweaking is possible.
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Re:hdparm?
Posted by: Anonymous Coward on October 11, 2003 10:33 PMsetting disk parameters.
In the command you give above:
-d1 enables dma (direct memory access)
-A1 enables read-lookahead
-m16 set the multiple sector I/O to 16 (as in read 16 sectors at a time)
-u1 sets interrupt-unmask
-a64 sets filesystem read-ahead (essentially buffering in main memory)
These options are all related to hardware control. This article talked about filesystem performance which is a separate issue. You can have the fastest harddrive in the world and still get bad performance because you are using
a filesystem that is configured all the wrong way. Usually any modern filesystem defaults to good allround settings which means they compromise and tweaking is possible.
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