The PS2s Partitioning-System and Filesystem isn't quite as on a PC.
-A partition is a multiple of 128MB.
-When a new partition is created, those 128MB-slices which are between partitions (and not yet allocated to/by any partition) are used and allocated to the new partition.
-You can call those partition/128MB-slices 'sub-partitions' for example...
-This fragments don't hurt at all... The only case were these partition-slices do matter is with Dual/Double-Layer-Games (the second layer needs to be continous, but I'm not sure, if OPL also suffers from this limitation)
-these 'fragments'/128MB-slices are used and allocated to a new partition, once you create it.
Fragmentation doesn't matter for such sizes.
Data-(read&write-)rate are not affected by it...
It would be different, how smaller the fragments were and how more fragments were available, but due to the PS2-Specific FS, this doesn't matter!
PS2 V7/DMS3 V2 (FW:2.4b7); Seagate Baracuda 200GB
PS2 V7/CC1.0 (FW:34 hacked v2 BM:2.1.6); Maxtor DiamondMAX9 PLUS 160GB
PS2 SCPH-30004R; NoMod+NoLaser
3xSony MC 8MB
MAX/Datel 16MB with Boot-CD
Custom FMCB 1.8b+ Beta-Build, my AIO 0.5, Sony&xRhino-Linux