Solution:

According to the specification of VIA82C686A (IDE controller) used on TPC-1560T and TPC-1260T The fastest IDE transfer rate is up to UltraDMA-66 . Besides, UltraDMA mode 0~5 transfer rate is below, just for your reference!! Ultra DMA Mode 0 　　　　235ns 16.7MB/s 　 ATA-4 Ultra DMA Mode 1 160ns 25MB/s 　 ATA-4 Ultra DMA Mode 2 120ns 33.3MB/s 　 ATA-4.Ultra ATA Ultra DMA Mode 3 　　 90ns 44.4MB/s ATA-5 Ultra DMA Mode 4 　　 60ns 66.6MB/s 　 ATA-5.Ultra ATA/66 Ultra DMA Mode 5 　 40ns 100MB/s 　 Ultra ATA/100 So user has to reset HDD of IBM as ATA-3 using Utility of IBM. Besides, it is confirmed that Toshiba 40Gbytes HDD--MK4025GAS can't work with this module no matter what kind of DMA mode. So it is recommended to using HITASHI or FUJI instead.