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Unread 11-06-2015, 01:11 PM   #2
Trod
Cooling Neophyte
 
Join Date: Jul 2013
Location: Mountain View
Posts: 4
Default Re: (Snap, GardianOS) : Max Disk Size - 9/2015

4TB drives were never validated on the 500 series systems. It may require a BIOS update to recognize the drive geometry, but 3rd party BIOS updates would cause Guardian OS to fail to function as it makes calls to specific areas of the BIOS and expects some custom values. So - if the system doesn't natively recognize the drive then you're probably out of luck.

You can get into the BIOS to see if it is actually correctly detecting the drives by connecting a serial null modem cable and using a terminal program like PuTTY to comm into it.

Serial settings are 115,200 baud, 8 data, no parity, 1 stop bit and xon/xoff flow control.

When the system is booting you should see the BIOS splash screen. To send an F4 sequence use alt-4 from the serial session. This should get you into the BIOS. Making changes is a risky business but in a pinch you could also use this to mount a USB stick and install another OS if Guardian OS won't do what you need.
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