Dell poweredge R720 HDD not detecting - RAID PERC H710 Mini Problem

jobby1
jobby1 used Ask the Experts™
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I have 4 Qty 1 TB SATA HDD in my Dell poweredge R720  . But only 2 HDD appear in the PERC H710 Mini RAID config utility in the BIOS.
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PowerEdgeTechIT Consultant
Top Expert 2010
Commented:
Did you install the "new" 2 disks, or are they all originally-installed disks from Dell?
Are all of them the same make/model?  If not, what is the make/model of the "new" ones?

Author

Commented:
It is installed originally by dell all disks are same size and speed.
PowerEdgeTechIT Consultant
Top Expert 2010
Commented:
Did they ever work or is this a new server?

Only two show up on the PD MGMT screen of CTRL-R?
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Author

Commented:
After I swap the HDDs now all the 4 HDDs showing as ready but not online in PD mgmt and BIOS device setting HDD properties.I cannot config RAID or install windows now.

Author

Commented:
Also i noticed 2 hdds are segate and 2 hdds westen digital.is this a problem.but same speed and size.
PowerEdgeTechIT Consultant
Top Expert 2010
Commented:
As long as the drives are certified, then the make/model doesn't matter.  It is unusual (but not impossible, for this reason, that Dell configured it with different makes/models), but if they were not all original Dell drives, the issue would most surely be one of compatibility.

At this point, you "should" be able to configure RAID as you wish.  Make sure the drives are not foreign ... highlight the controller on the CTRL-R, VD MGMT screen, foreign, clear.

Author

Commented:
Now I managed to confg RAID 5. Howe ever I can not create the partition size more than 2.2 TB while installing windows. The remaining space system  create another volume but I can  not format or do anything. I am using windows 2012 R2 std.
IT Consultant
Top Expert 2010
Commented:
Windows cannot use a disk larger than 2TB unless it is a GPT disk.
Windows cannot boot to a GPT disk unless installed on a UEFI-enabled system.

You need to boot to F2 and change the boot mode to UEFI, then you need to convert the "disk" to GPT prior to installing Windows.  If you need help doing this, you will need to start a new question.

http://technet.microsoft.com/en-us/library/dn336946.aspx
PowerEdgeTechIT Consultant
Top Expert 2010

Commented:
Why the grade of 'B'?

Author

Commented:
does it matter?
PowerEdgeTechIT Consultant
Top Expert 2010

Commented:
Yes.  

1) It helps me know what to do to improve answers.  
2) EE would like you to explain the reason for a 'B' grade, so others know what kind of information is "missing" from the Accepted Solution(s) to have a "complete" solution to be able to resolve their issue too.
3) Points are awarded based on the grade.

http://support.experts-exchange.com/customer/portal/articles/481419

I don't care about points or a "perfect record" ... others read and rely on these threads for solutions, and while it appears from the thread that the information I provided was what you needed, the grade of 'B' indicates that something was missing from it to be considered a "complete" solution.

I won't bug you about this or anything - I'll let you do whatever you will with it - but most Experts rely on the grading to improve their answers.

Take care.

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