I have a WD MyBook Studio 4TB with 2x2TB drives in RAID-0 config (4TB total) connected to a ‘server’ running Windows 7 Professional 64-bit SP1 via eSATA. Drive works fine most of the time but the machine and drive are on 24x7 (it is a server) and occasionally every few days the drive ‘disappers’ and Windows cannot see it. There is nothing in the event log that I can see. To recover I have to power off the drive and computer, disconnect the drive, wait a minute or two, reconnect the drive, power it up and then boot the computer. As you can imagine for a server this is totally unacceptable. I have had this issue before with other MyBooks connected over eSATA on other machines so I stringly suspect that it is not the PC but rather the MyBook. It is running the latest firmware.
Anyone else seen this problem? Anyone have any solution?