Hey [NAME]-Jay Well, based on that information I decided to just try a later version of Intel Rapid Storage Technology.  I settled on v12.8 because it said it was compatible with XPS 8500 and that seemed to have more in common with my XPS 8100 than the v10.1 minimum that I would need, that said it was compatible with an alienware laptop. Anyway, I installed it, my PC is still running fine and it seems like it was a necessary update based on a few changes I've noticed.  DiskPart no longer reads the drive as being 1678GB, nor does HD Sentinel or a few other programs which are all correctly saying it's a 4TB HD.   Strangely though when I go into the BIOS it still reads the total drive size as 1800GB and the WD Lifeguard help software lists the capacity as 1678GB.   Why just those two places list it now when DiskPart etc don't I literally have no clue...  Perhaps it's something to do with the fact that I originally formatted the drive before I updated the driver/storage controller?  HD Sentinel also lists the ATA checksum as 'valid' for both my drives now as well, whereas before it listed it as invalid.  It also lists a couple of functions have been activated too that weren't before, but not really sure what they do! So, it seems like it was a good decision, but I did run another ChkDsk and it brought up a few more problems with the file system that it corrected.  I ran it twice after and there weren't any, but it's a little worrying. I have ran full disk scans with WD lifeguard with no problems found and no other problems found by Crystal Disk, HD Sentinel etc. I'm not sure what I can try now?  It seems like there might be a problem with the file system, but not sure how to fix that aside from keep running ChkDsk every now and then and backing up constantly.
Hi, I have a 4TB internal hard drive installed that Windows/Disk Management correctly lists as 3.76TB, however, Disk Part and various software lists incorrectly as 1.67TB. I found out that any version of Intel RST below 10.1 doesn't support drives below 2.2TB. However, for my XPS 8100 the most recent supported Intel RST version that Dell and Device Manager says is installed (v9.5) [URL] Whilst researching to find out what I could potentially do to solve this incorrect reading I found the below thread where two people said they'd updated to v12 with the same XPS 8100 as me. [URL] I could leave it alone as the drive has been fine for almost 2 years, and has passed SMART and other health checks with no problems. However, a ChkDsk was automatically run at startup the other day. All issues were corrected, but it might indicate an issue that stemmed from the above issue? Before I try updating the Intel RST I just wondered if there was perhaps anything else I could try or anything that I should do/know. I'm also wondering whether I should try and find Intel RST v12 (if possible) or just update to the latest version. Thanks for any suggestions!
Intel Rapid Storage Technology and above 2.2TB hard drive issue