--- David Lockwood <[EMAIL PROTECTED]> wrote:
> i.e. dma wasn't turned on at all.
> So as a newbie I follow a few leads on hd optimising among the few
> options not listed as dangerous in man hdparm and settle on
> # hdparm -c 1 -X udma2
> and transfer rate increased to about 2.8MB/s.
hdparm -c1 -u1 -m16 -M254 -A1 -a0 -k1 -K1 -W1 -X udma6 /dev/hda /dev/hdb
I'm not sure if some are optimal--for instance I turned off filesystem
readahead (-a0) since in my testing it seems to have little or no effect for
me. I've never had any data corruption caused by these.
NTFS reading might be slower because of the filesystem driver (I noticed that
NTFS tends to be faster in Windows also). Test your read/write speeds on
Linux-native filesystems instead to make sure the NTFS driver is not the
limiting factor.
You can choose the option in the kenrel config that says "Enable DMA by
default" and it will do the same as hdparm -d1 on initialization of the
drive.
Some of my hdparm settings are "dangerous" but I tend to feel lucky with my
hardware. I've also used the "deregester IDE channel" hdparm option before
and was able to unplug and swap out an IDE hard disk while the system was
running. Very cool (and also listed as "dangerous"). Yes, it is dangerous,
but I found it very instructive. If you like to live dangerously, maybe try
hotswapping your IDE hard disk too (:.
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