i'm runnning winhttrack3.30 and notice that even though my
harddrive (ntfs, 10/20gb left) was just defragmented before,
after running a mirroring operation, the /hts-cache/.dat,
.txt, .ndx had something like 100-1000 fragments.

couldn't you reserve some bigger chunk of space for these
growing files in advance, so they won't get that messy ?(could speed up
further runs too, as the readperformance
would be increased)