Seagate ST4000DM005 4TB HDD - Windows 7 x64 - Won't recognize drives full capacity

[Dougtron]

So I recently purchased a Seagate ST4000DM005 4TB HDD and Windows 7 x64 Disk Management is only recognizing the drive as 1677.90 GB. However I have a Western Digital WDC WD40EZRZ 4TB HDD that I've had for almost two years and Disk Management recognizes it as 3725.90 GB. I tried downloading Seagates Disc Wizard tool and the disk management portion recognizes both of the HDD as only 1.69TB, even though the one HDD definitely using more space than that currently. I don't understand why it won't recognize one HDDs full capacity but has no problem with the other.

 

[JaredDM]

Just a couple questions to help you single it out:

How are you connecting the drives? Directly by SATA or through a USB bridge/dock that might not support large drives?
What partitioning structure did you use for the second drive? MBR or GUID? MBR doesn't support partitions larger than 2.2Tb so that can cause an issue (though it doesn't sound like your issue).

Can you post a screenshot of what disk manager is showing?

 

[Dougtron]

I'm connecting it via SATA straight to the motherboard, which is an ASUS H55M-UD2H. The drive is partitioned using GPT (GUID). Here is a screenshot of Disk Management:

 

[ac13044]

try this method to see size of disk

1)go to start
2)type"cmd"
3)type"diskpart"
then write all these comands
list disk

 

[Dougtron]

 

[Dougtron]

I downloaded ATATool and got this detailed information about the drive:

 

[JaredDM]

Looks like this is a known issue with Intel Rapid Storage Technology drivers. Try updating or re-installing your Intel RST drivers. You can download them here: https://downloadcenter.intel.com/download/27308/Intel-RSTe-AHCI-SCU-Software-RAID-Driver-for-Windows-

 

[Dougtron]

Looks like this is a known issue with Intel Rapid Storage Technology drivers. Try updating or re-installing your Intel RST drivers. You can download them here: https://downloadcenter.intel.com/download/27308/Intel-RSTe-AHCI-SCU-Software-RAID-Driver-for-Windows-

I can't seem to find the correct drivers for Windows 7.

 

[Dougtron]

So I went into the BIOS and switched the SATA controller from AHCI to IDE and it recognized the full size of the drive. I then switched it back to AHCI and it still recognized the full drive so I thought I was all good.

I copied a bunch of stuff over to the new HDD but when I restarted my computer it still recognized the full size of the drive but said it was RAW data and needed to be formatted. I then went and switched it back to IDE mode and Windows spent a few hours doing CHKDSK and recovered some of the files.

Will I be fine if I leave my system in IDE mode? Should I keep trying to get it to work in AHCI mode?