Leslie_K. Posted January 2, 2011 Share Posted January 2, 2011 I got this beauty of a pendrive for Christmas from my girlfriend and I was wondering if anyone could tell me what's the default allocation unit size it's shipped with, because I don't seem to find the correct setting. The thing is, that I want to use this pendrive as not only a storage unit but also as a Windows 7 installer (I have already done that successfully many times with my Voyager GT 4GB). When I first connected the drive to my computer and tested it with ATTO, my results were jaw-dropping great, peak write performace at 32,156 KB/s and peak read performance at 36,122 KB/s. To create a Windows 7 installation USB drive, I used the the good old commands in diskpart to create an NTFS partition with an allocation unit size of 4096 bytes. Everything's fine, the pendrive is bootable, but the write/read speeds have dropped significantly: peak write performance at 24,382 KB/s, peak read performance at 30,988 KB/s. I tried to reformat the drive to FAT32 and I played around with the allocation unit sizes, but the best results I got were 29,859 KB/s / 34,952 KB/s (write/read, respectively). The only solution to restore the factory performance is to run the firmware update utility (Corsair 32GB-64GB GTR FW Update 1_07_2.exe) and let it do its job, so this way I got the FAT32 partition back with the awesome speeds but this way I can't make the pendrive bootable... Any thoughts or advices? The best thing would be to know the allocation size unit you use to format the drives before shipping. (With diskpart I can only choose from 8192B->64KB). Link to comment Share on other sites More sharing options...
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