Barracuda XT, Barracuda, Barracuda Green, DiamondMax and other desktop SATA and IDE drives

[cgion]

I've combed through the forums on the 3TB issues in the internal Mac Pro bays as well as external enclosures, but haven't found somebody reporting the same issue I'm having. One of the Barracudas is recognized fine as 3TB, while the other is recognized as 800 GB. The 3TB Barracuda is in bay 4, while the 800 GB one is in bay 2. Any thoughts?

Thanks

[cgion]

Apologies for not including system info, in the initial post. They are appended below.

Hardware:

Hardware Overview:

  Model Name:Mac Pro

  Model Identifier:MacPro3,1

  Processor Name:Quad-Core Intel Xeon

  Processor Speed:2.8 GHz

  Number Of Processors:2

  Total Number Of Cores:8

  L2 Cache (per processor):12 MB

  Memory:6 GB

  Bus Speed:1.6 GHz

  Boot ROM Version:MP31.006C.B05

  SMC Version (system):1.25f4

Software:

System Software Overview:

  System Version:Mac OS X 10.6.8 (10K549)

  Kernel Versionarwin 10.8.0

  Boot Volume:Macintosh HD

  Boot Mode:Normal

  Computer Name:CG Mac Pro

  User Name:cole.gion (Neo)

  Secure Virtual Memory:Not Enabled

  64-bit Kernel and Extensions:No

[cgion]

Also, more immediately important for me at this point, will the drive function properly if I start using it formatted at 800 GB?

Thanks,

Cole

[fzabkar]

The 800GB capacity is a symptom of a 32-bit LBA limitation. I'm not a Mac user, but I'm wondering if your Mac's motherboard has two SATA controllers, using two different drivers. One driver may be affected by a 32-bit limit, while the other may not.