As far as DSI errors it has something to do with the disks being to fast or something I hear for the OS. You can ignore it. A lot of people get them in things other than Timberwolf. Its popped up for me a few times on my X5000 too. Much more since getting a SSD on it.
A DSI has nothing at all to do with the disk speed.
It stands for Data Storage Interupt and means a program has attampted to read from or write to a protected or non existant memory address.
The reason is different for every program, though attempts to read from NULL are perhaps most common.
The consequences are different for every program, depending on how they triggered the error, sometimes you can safely ignore them, somethimes not.
If you get more with a faster drive then likely the prgram that's throwing them has a race condition shown up by faster resposonses, send abug report to the author!
