"vulnerable"... lol. All drives must support LBA according to the ATAPI-4 Standard, so this is a moot point. The driver automatically selects LBA mode when available. If a device conforms to an earlier Standard (in which case LBA support is Optional), its capacity is unlikely to exceed 32Gb in any case. I doubt there were 32Gb IDE devices being produced in 1996.Because of this, I doubt there will be any problems encountered in using the 4.10.2222 version of ESDI_506.PDR as a base. In any case, applying the patch to a newer version should prove just as easy. I've chosen to abandon reassembling the driver completely, as it seems to have been built with a strange Linker that is apparently not available outside of Micro$oft. Instead, it will be more similar to a complex version of the Loew patch.