I have same problem with my FAP 750 on eSATA connection.
1. eSATA connector at the drive is covered over by body of enclosure, therefore creating space of 5 mm. This creates problem with the eSATA cable (loose connection), and forcing us to cut cable's connector "head".
2. Drive will fail with Seagate software when connected on eSATA - Sea Tools for Windows. When you choose - Basic Test - Short drive test : it will fail.
If you try to get some info about drive under - Basic Test - Drive Information - Enquiry/identify: No info will be given.
3. When you run Seagate back-up software: FreeAgent Tools - Utilities -Run Drive Diagnostics: you will get Diagnostic error code like
6BAA9C62 - it will tell you to get RMA number for return (indicating that your drive is faulty). Every drive with eSATA connection will fail this test (or at least 10 I had - 100% failure rate).
4. If you ignore those test, drive will work, but:
if you have continues transfer that will take more then 30 min - 1 hour drive will most likely will stop working. Only way to make it work again is to switch it off, switch of computer, let AFP drive cool down, put drive on again, switch on computer.
*****Trick with on/off button - you have to touch and hold it for at least 3-5 sec. to work.******
5. It looks to me that, when AFP drive gets to hot, it will slow down and finaly shut down. Indicating to me, that they build in heat protection for drive, that would be fine if the drive head fan to cool it off. However this AFP enclosure does nothing to cool the drive off (drive is heating up the aluminium case) but internal heat is same - no cooling effect.
Conclusions:
if I am right - Seagate FreeAgent Pro 750 GB or similar products are defective and do not work as advertised, therefore eligible for recall.
I would appreciate if you people on the forum run those test, and provide results of those tests.
Take care