Hi , First of i shall like to thanks the Admin, Mod & all the members for this nice forum. Ok, before discussing my problem - a berif snap shot of my system. 4IDE drives - 2HDD(80GB, 120GB @7200rpm), DVD-RW & DVD-ROM. Multiple OS - Win98SE, Win2000Pro+SP4 & WinXPSP2 on 80GB(Primary IDE) 120GB is on Secondery IDE for stroage only. This 2HDD are well partioned according to my suite.Actually this system is for editing purpose, as all of you know a lotsa space is reqd. for DV capture.So, i added 160GB SATA HDD(for stroage only) to my system.I partioned it into 3 primary each of 31GB and the remaining into 2Logical partion each of 28GB.All these are in NTFS. Now the problem is regarding space loss for SATA HDD. 266MB loss for each 31GB, a huge loss of 2.2GB in the first 28GB partion and a minimal of 26MB loss for the last 28GB partion.I have partioned them using partion magic7.0 pro from XP.For the other drives the losses are ok, but 2.2GB is a huge loss.Later i boot the system from 2000 & format that partion by using windows format, after which it is shown 26MB as loss.I was happy with it until i boot from XP, it detect a new hardware...reboot the system and again the partion loss for the first 28GB is 2.2GB So as i format & stick with Win2000Pro loss is 26MB.As soon as i switch to WinXPSP2....loss becames 2.2GB.I have also tried other ways....by deleting both 28GB partion and merge them to one big 56GB partion.But the result is same....Loss is minimum as i fromat from 2000 while it is 2.2GB+ from xp. So, here i am very much confusion with these abnomal behaviour. Sugesstion are most welcome regarding partion so to have minimal losses. thanks;- seeetu.