Is this a Type III drive? or is it a toshiba version of the IBM Microdrive?
I have booted the ST 1000 from Fuji Type III HDDs, Callunacard Type III HDDs and IBM Microdrives, but the ST 1000 would not boot from a hard drive in a Type II PCMCIA enclosure.
I think that IF the drive were formated correctly and of the right type, the ST 1000 would boot or you would get a message from the ST 1000 that it couldn't boot from the drive, meaning that the ST 1000 SEES the drive but can't boot from it (I have had this happen to me with a Ghosted drive that seemed okay but wasn't).
Just because the drive is USABLE to transfer files and is recognized when placed into a pcmcia slot on a desktop or laptop, this does not mean that the drive is BOOTABLE nor does it mean that the drive can be booted from without drivers first being loaded to recongize it.
I think I saw this Toshiba drive on ebay, are these Type II drives of 1GB? Prehaps these drives need drivers loaded for them before they can be booted from, meaning that the ST 1000's bios will not allow you to boot from these drives.