|I have already provided all the info you need to troubleshoot your problem.|
" found I get a different response between front and rear USB ports. "
READ the info at the first link in response 1 !
Front ports on desktop cases may have inadequate wiring between them and the mboard USB header !
If none of my suggestions help, and you tried connected the USB adapter to a port that should be able to supply the full 500ma then this applies:
Those USB to hard drive adapters are NOT recognized by all bioses.
If the bios doesn't recognize it, the bios can't recognize the hard drive.
In that case, if you have spare PCI slots, buy yourself a PCI EIDE (a.k.a. PATA) drive controller card. All mboards recognize those. You can connect at least two drives to it, or four.
- there is usually one PCI slot that shares it's IRQ with the onboard video or the video card in a PCI-E X16 slot or AGP slot, whichever video you're using. It's usually the one of the PCI slots on the end closest to the middle of the mboard. Don't install the drive controller card in that slot - only PCI video cards are not likely to have problems when installed in that slot. If you have a generic desktop system, the info about which slot shares it's IRQ with what is often shown in the manual for the retail mboard model.
- you must install drivers for the card's drive controller chipset in the operating system, if the chipset isn't recognized automatically and drivers installed for it by the operating system.
- the same applies when you install Windows on a hard drive connected to the card
- if you want to be able to boot from a drive connected to the card, you must be able to select SCSI in your Boot Order or similar list in the bios Setup, and you must list SCSI before hard drive.
(In some brand name system bioses, you can't do that.)
" I may have a problem in that my system is VISTA and the drive is from an XP system."
That probably has absolutely nothing to do with your problem.
New hard drives, or used hard drives that have had their partition(s) deleted, have NO DATA on them and will not appear as one or more drive letters in Computer or Windows Explorer.
You must go to Control Panel - display as Small Icons or Large Icons (not Category) - Administrative Tools - Computer Management - Disk Management - and make at least one partition on it and format the partition(s).
If you want more than one partition on it (it is WISE to have more than one if it's ever going to be your only drive), then change the size of the first partition to something smaller - 1,024mb/gb.