Windows Server 8TB drive goes offline at 6.2 TB

Good Morning.

Okay i'm scratching my head at this. I have a Dell R720 server that has a Raid 1 (2 drives) for the OS and then 4-4 TB drives in RAID 5 that I use for my B2D using Backup Exec 2014. I have approximately 8 TB of usable storage.

Everything works well until the backup drive hits 6.2 TB of used storage (leaving 2 TB UN-used). The drive then goes uninitialized, wiping out my backups.

I've updated RAID drivers, etc. etc. and the event log simply refers to a drive is offline.

Frankly I don't even know where to begin to troubleshoot.
MCrowdAsked:
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Cliff GaliherCommented:
Even if a drive was failing, your RAID5 should be kicking in. This really sounds like a RAID controller failure. Check for firmware (not driver) updates. And if that doesn't help, open a support incident with Dell. It may be a bug or it may be failing hardware. Either way, Dell will need to be involved.
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MCrowdAuthor Commented:
Drives are fine. I think you may have hit on something -- I upgraded drivers, not the firmware for either the system or the PERC controller. Doing that now and we'll see.
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jimmymcp02Commented:
Do you have the specific version of backup exec that you are using BE 2014 sp1 or sp2?

There might be a known issue with the version you are using while backing up.

Do you have any error messages in the BE console? or windows event viewer?
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Seth SimmonsSr. Systems AdministratorCommented:
do you have OMSA installed?
wondering if anything appears in the hardware or controller logs that would explain it
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MCrowdAuthor Commented:
Thank You! it was the battery on the RAID Card...
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