Hi,
I’m working on a filter driver that redirects based on file usage. i.e.
When it sees a file that is being accessed a lot, it moves it to a solid
state disk (ssd) and then redirects all accesses to the fast drive.
It’s useful in many situations (lots of reads and not many writes) to
mirror an ssd with a regular drive so that reads happen at the ssd speed
(<5 microseconds), and writes happen at the hdd speed (>5 milliseconds).
This works fine on NT because all reads come from the ‘primary’ volume in
the mirror set.
My problem is with Win2K. The software mirroring in 2K assumes that the
drive speeds are equal, and therefore divides up the reads to both drives
to improve read speed. In my case, this means that the reads are slowed
down to hdd speed.
Does anyone know how to change or fool the logical disk manager in Win2K so
that all reads come from only one of the mirrored volumes? Any suggestions
would be appreciated.
Thanks,
Adrian
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