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Guest
Guest
Have just upgraded my PC with a PCI UDMA 100 CMD Controller and an IBM DTLA 307045 hard disk (46 GB, 7200 rpm, UDMA 100). Everything runs OK on my W98SE OS. Wanted to test the performance with the new system running the Winbench 99 disk test. My disk was partitioned with FAT32 using FDISK, have in total 8 partitions 6,8; 7,8; 7,8; 2,4; 2,4; 1,5; 2,4 and 11,4 GB. The first partition (6,8 GB) is the primary one on which my W98SE is installed. Other partitions are logical extended DOS partitions. Runing the benchmark test in UDMA 100 Mode 5 I am finding significant differencies in the transfer rate between different partitions as follows: C:\ 38 MB/s; D:\ 36; E:\ 33; F:\ 31; G:\ 29; H:\ 29; I:\ 27; J:\ 27. While runung the test in Mode 2 (UDMA33), there are almost no differencies in transfer rates between different partitions. I can change the UDMA Mode in my CMD 649 Windows drivers. Can somebody explain why? How can I get better performance on my extended partitions? Does it make sense to have several partitions if UDMA5 applies on the primary partition only?