Pending further investigation, we now allege that Maurice Verhagen wrote: > Hello, > > last week I wrote about my broken IBM disk in here. > the 6gb travelstar I wanted to buy wasn't available anymore. > So I looked for another disk and found the travelstar 20GN (10 gb) space. > I saw the interface was ATA-5 although the same IBM page said the > interface was ATA-4. > (http://www.storage.ibm.com/hardsoft/diskdrdl/travel/32gh30gt20gndata.htm) > > I wondered what this interface is. Does ATA-5 exist? I now have an > thinkpad 390e with ATA-4 interface which supports 9.5mm disks, this is my > only chance, or doesn't it work at all? > > please, could anybody make this clear to me? >
I'd imagine that they mean that it's a UDMA/66 drive, which would be compatible with older systems. The pins are all the same, it's just the cables and controllers that are different on UDMA/66. You also aren't necessarily required to get an IBM drive. Any 2.5" 9.5mm IDE drive should work (although IBM hard drives are good ones).

