what is the maxium capacity of the harddrive what u can use for ide sunrise interface?

what is the maxium capacity of the harddrive what u can use for ese megascsi interface?

Both are limited to FAT16 partitions which have a maximum size of 2GB
However, you need a FAT12 boot partition, and you 'd probably want to have at least one diskdrive available. So you'd get

A: FAT12 bootpartition (max 32MB)
B: FAT16 (2GB)
C: FAT16 (2GB)
D: FAT16 (2GB)
E: FAT16 (2GB)
F: FDD1 or FAT16 (2GB)
G: FDD1 or FDD2
H: RAMDISK

This is the largest amount of partitions you can have available at the same time (A bit more than 10GB). If you want to access even more HD-space (on MSX? why???) you could use a partition changer tool to swap partitions (map unused partitions to driveletters).

It's possible to connect even 250GB harddisks to MSX. However, you'd only be able to actually use a small percentage of its space

Correction, snout: The IDE addressing limit is set to 8GB, just in case something might happen. It's briefly explained in the FDISK310.TXT helpfile.

In short: the sector address is a 24-bit address and each sector is 512 bytes... 2^24 * 512 = 8589934592 == 8 GB... Hence the limit