Hello! (plz, don't note my bad writing, I'm Brazilian - I don't speak English) I'm looking for some information. I have a 40gb quantum Plus AS 7200 [ATA 66] running win2ksp2 (256 ram). All professional defragmentation programs I tryed (~4) dont defrag NTFS partitions cluster greater than 4kb [mine's 16Kb] ------ NTFS > 4kb cluster --------- good - fast speed good - less fragmentation bad - don't defrag bad - lost some disk space ------ NTFS <= 4kb cluster --------- good - can defrag good - don't lost disk space (relative) bad - lower speed (relative) bad - more fragmentation. ============================ C : FAT32 : 32KB CLUSTER : 2GB D : FAT32 : 32KB CLUSTER : 10GB E : NTFS : 16KB CLUSTER : 20GB <--- F : FAT32 : 32KB CLUSTER : 4GB G : FAT16 : 64KB CLUSTER : 2GB ============================ What cluster size should I set for NTFS part? And about MFT? What's the MFT function? What percent of the disk should I set for MFT size (12,5%? 25%?)? Plz, post your comments! Thanks!