dc2000 Posted February 22, 2010 Report Share Posted February 22, 2010 Hello:My system is Windows XP SP3 that has all the latest updates installed. I'm using an admin account without any restrictions. Recently I bought a brand new 1.5 TB hard drive that I installed as a secondary drive on my system. I formatted it as NTFS and started using it as a back-up data/video/sound storage.Now recently I've discovered that a backup of my DVD (.iso file) when burned to a disc was not playing right. It took me quite a while to realize that when I copy a large file on to this hard drive it somehow gets corrupted. I don't know how and where but I can tell by using a third party file comparison software (Swift Compare) that simply states that two files are not identical right after I copy it from a good hard drive into this new one. I also need to let you know that this issue seems to be happening only with large files, for instance 7.3GB and such.Is it something specific to Windows XP? To a hard drive? And is it possible to fix it? Quote Link to comment Share on other sites More sharing options...
MANEMAN Posted February 23, 2010 Report Share Posted February 23, 2010 Hi there, and Welcome.I have noticed this myself when copy/pasting, or drag/dropping large files from XP to an external drive. Have never bothered to find out exactly what is going on though. It has been mainly .exe files that have either been missed or corrupted.If I leave the process to my backup software ( ** I Use This ** ) No such corruption occurs. Similarly if I break things up into smaller chunks before transfer no missing files or corruption takes place.John. Quote Link to comment Share on other sites More sharing options...
ɹəuəllıʍ ʇɐb Posted February 23, 2010 Report Share Posted February 23, 2010 One thing to experiment with would be to use XCOPY, and see if this also occurs.Another thing to try is to use the largest possible cluster size (64KB) instead of the default (4KB) for that external hard drive, especially if it is used to store mainly large files. Quote Link to comment Share on other sites More sharing options...
dc2000 Posted February 23, 2010 Author Report Share Posted February 23, 2010 Guys, this is not an external drive. This is my secondary internal 3.5" drive, that is stationary and is used as drive D:So how do you increase the cluster size? Quote Link to comment Share on other sites More sharing options...
ɹəuəllıʍ ʇɐb Posted February 23, 2010 Report Share Posted February 23, 2010 There are various program that can do that; I use Partition Magic 8 (the original from Power Quest, not the bastardized version from Symantec) to do that.Make sure that you have a full backup before you start playing with the cluster size. Quote Link to comment Share on other sites More sharing options...
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