I wanted to be able to hot swap my 2 eSATA drives. I have to re-boot after powering them up to get them recognised. I enabled the eSATA driver in Vista and converted SATA devices to AHCI and all booted ok but the eSATA drive does not appear in the SATA list but only in the boot list as IDE and in Device Manager as SCSI. Consequently I can still not hot swap.
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Well, I just tried a hot swap and it is working for some reason. Both esata drives show as SCSI but if they will hot swap I guess it doesn't matter so much.