So I have bought a MyBook Studio II (quad connect, 4 TB RAID0 formatted as NTFS) and plugged it to my home PC, which has a GA Z77X UD3H motherboard supporting 6Gb eSATA. Two issues:
Transfer speed. It’s atrocious for a RAID0 eSATA HDD. The maximum speed CrystalDiskMArk was able to obtain was 130 MB/s in burst mode, which is similar to my internal, 3 year old 1.5 TB Samsung. The average goes at around 109 MB/s, obtained after transferring about 1 TB of full DVD images (so only large files) off my nicely defragmented Samsung.
Sometimes when I power the drive up it is not recognized by the Operating System. I have to pull out the cable, shut down the machine, shut down the drive, plug everything back in, start the drive, start the machine. The eSATA port is set as hotplug. When this occurs, I can hear the HDDs in the enclosure making click noises, but the disks are not the issue, I think the controller is acting up. Also when that happens the OS hangs for a fraction of a second every 2-3 seconds, including the mouse pointer if I’m moving it around. If I keep the cable conencted, my OS won’t shut down. The exact same behavior occurs on my Lenovo T410 on eSATA.