Hello, I am running Mac Pro 2009 with latest SL (10.6.7), just added NewerTech MaxPower eSATA 6G card and attached an external drive via it. It behaves very very strange. Works very fast & normal but hangs for 30-70 secs every minute or so. Example: I am copying 1GB file, it copies fine & fast like 300-400 MB, than simply hangs for a minute or so, than resumes. This behavior makes it almost impossible to use it, since even Finder is hanging every minute when I am browsing external disk. It has nothing to do with the disk itself since I've tested it with 2 different disks from different manufactures (different enclosures as well). And by the way both of them are working just fine with FW 800. I've also found this thread in German talking exactly about the same problem. The user here mentions that it's also not related to eSATA card itself since he has the same behavior with Sonnet card as well. Unfortunately no solution. Err... I am frustrated and don't really now what to do now :-( Any advises? Thanks!