My DVD rewriter has slowed to a crawl.

Hi

I have two Optiarc DVD RW AD-7170A drives in my PC -one is master and other
is slave.

Today I decided to copy a DVD using the slave drive. However,I noticed that
the speed of the slave drive was being limited to ~2mb/s. When I tried with
the master drive, it was able to read at more than 10mb/s. Previous to this,
both drives were reading and writing at approximately the same speeds.

To try and cure the problem I uninstalled both drivers and reinstalled on
boot-up, even switched the cables to the drives. Unfortunately this did not
make the slave drive operate at the same speed as the master. This approach
had worked before but not on this occasion.

I then decided to swap them over, the master drive becoming the slave and
vice versa. When I tried to read the DVD, the drive that was previously the
slave but now the master drive was able to read at speeds over 10mb/s.

I have tried everything that I could think off to reset the slave drive to
read/write at the same speed as the master.

Anybody got any ideas as to what is going on and how I can resolve the
issue?

thanks