RE Perfect Disk 8.0 Vs Diskeeper 10.0 (Professional)
I own the latter and have just downloaded the former's trial version.
A] I've had Diskkeeper perform an offline defrag, then once booted, performed an online defrag.
B] I've had Perfect Disk analyse the drive, it reported it to be be in excellent condition with no defrag required.
C] I've run Perfect Disk's offline defrag, then once booted, performed an online defrag.
D] Reboot.
E] Once again let Diskeeper run an online defrag.
For refrence, I'm a home user, single physical drive, and defrag weekly so it's it pretty good health to begin with.
Conclusions.
Each product wanted to locate files in it's own maner, I couldn't say one is more correct, just different. My observation at booting after a defrag was Perfect Disk produced slightly more actuator activity than Diskeeper, but boot times were about identical. Diskeepers drive analysis was noticably faster and I prefer it's interface (but that of course could be simply due to me being used to it). I'd observe both are good products and would be happy with either, if buying today as a replacement for XP's included utility I'd go for Perfect Disk as it's US$10 cheaper.
(Not exactly the worlds greatest review but , meh...)
Interesting enough re-analysing C drive after two hours Perfect Disk says it's fine while Diskeeper says defrag would be good (?) Go figure..