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Did you try tap right mouse button on disk? There shout be initialize or enable or online.
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Did you try tap right mouse button on disk? There shout be initialize or enable or online.

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Yes, it's online but Invalid. Also diskpart sees the disk as online.
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Yes, it's online but Invalid. Also diskpart sees the disk as online.

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Windows diskpart did not initialize the partition, only way to get it back was true 3the party software
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Windows diskpart did not initialize the partition, only way to get it back was true 3the party software

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We have a 2008 R2 Server with two partitions. C (OS), E (Data). The e drive is a GPT partition because it's 7TB. After booting the GHOST Bootstick I saw GPT partitions are not supported. I rebooted the server. The raid contoller (HP) shows everything functioning with no errors. When Windows is booted it shows the E drive as Invalid.<br />
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Is there a safe way to get the disk online again? <a href="https://filedb.experts-exchange.com/incoming/2011/10_w41/508814/Disk.png" target="_blank" title="Windows Invalid GTP partition (28 KB)"><img alt="Windows Invalid GTP partition" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2011/10_w41/800_508814/Disk.png" /></a>
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Disk.png

We have a 2008 R2 Server with two partitions. C (OS), E (Data). The e drive is a GPT partition because it's 7TB. After booting the GHOST Bootstick I saw GPT partitions are not supported. I rebooted the server. The raid contoller (HP) shows everything functioning with no errors. When Windows is booted it shows the E drive as Invalid.

Is there a safe way to get the disk online again? 

Windows Invalid GTP partition

The Microsoft Legacy Operating System topic includes legacy versions of Microsoft operating systems prior to Windows 2000: All versions of MS-DOS and other versions developed for specific manufacturers and Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions, and Windows Mobile.

Microsoft Legacy OS

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.