Sound and useful advice here, always. I was curious on another matter myself and in keeping with the spirit of another somewhat similar topic i decided instead of swaying OT to open this one. I routinely keep 2 disks for the same purposes of using one to store archives but only recently brought out some drives from cold storage that i have split (partitioned) into 2. Now mind you i focus and specialize in malware research not drive technicalities per say (although i'm climbing the ladder nicely LoL) and so the reason for a couple of questions. Ok, to give you an idea of what leads up to my interest in this, as mentioned there are 2 partitions to a single drive, however, ONLY ON ONE partition is FD-ISR + it's snapshots, the other one is not installed with FD-ISR but independent. I added an extra line (partition)(1)(2) to the BOOT.INI to both in order to dual boot between partitions which works with ease. My questions don't exactly concern archives although i use the non-FD-ISR system as the collection/receiving point for FD-ISR .arx's in the other one. #1 IF you defrag say in the non-FD-ISR partition, will the defrag ignore the other partition WITH fd-isr? Or will it defrag the entire drive, partitions and all. Reason i ask is i don't defrag much that often but when i do i use strickly DiskTrix's UD that is really served me well. I do exclude the archives folder when defragging for safety. #2 Now to this question. The disc platter is a circle (of course) sandwiched on both sides of it are the read/write arms (i assume). If you are duplicating my method which of the 2 partitions that you desire to run FD-ISR on stand a better chance at performance with least drag or delay, the outer rim or inner rim? The inner rim is smaller diameter and might stand to reason? would revolve fastest whereas the outer rim, just like an orbit, has more real estate to cross to complete it's full circle or pass (revolutions). On simple observation (looking under the hood/lid ) it appears to me the platter disc which accummalates our electronic/magnetic data would perform best where the turns are the least and grow outward, but i read just the opposite in some sites. They say the best is from the outer rim working inward toward the spool or pivot. As a side note of concern, i still cannot explain to this day why CHKDSK one day fudged all my archives once. After it ran it scrambled them so bad i had to dump them and recreate/Copy all over again. This issue is not since been repeated btw. However i don't defrag any partition housing FD-ISR archives at all and i learned also not to jump the gun with RegCleaners either.