add Hard disk but Unknown

Posted on 2011-10-12
Medium Priority
Last Modified: 2012-05-12
On VMware ESXi with SAN and Storage, There are some Windows 2008R2 servers runing.
I want to add Hard Disk to one server as D drive, and added hard disk. Normally, There would be no prpblem
however, the attached hard disk seems to be not working.
I opened the start > Administrative Tools > Computer Management
and then,
DISK1 "Unknown" status. it says "Offline"

Normally, I can set up Volume but, something is strange with this new virtual disk.

Please let me know  what is happening ? how can I  format this disk?
Question by:shouichi
LVL 40

Expert Comment

ID: 36956240
Sometimes that happens...and it takes a while for the OS (Windows) to 'recognize' the volume. Can you reboot the VM, or is it critical? If you are able to reboot, do so, then go in Disk Mgmt and try to Initialize it, then partition/format it.

LVL 124

Accepted Solution

Andrew Hancock (VMware vExpert / EE MVE^2) earned 2000 total points
ID: 36956268
Right Click the Disk, and Click Initialize, that should bring it Online, and then Partition, Format as usual.

Featured Post

Veeam Disaster Recovery in Microsoft Azure

Veeam PN for Microsoft Azure is a FREE solution designed to simplify and automate the setup of a DR site in Microsoft Azure using lightweight software-defined networking. It reduces the complexity of VPN deployments and is designed for businesses of ALL sizes.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

HOW TO: Upload an ISO image to a VMware datastore for use with VMware vSphere Hypervisor 6.5 (ESXi 6.5) using the vSphere Host Client, and checking its MD5 checksum signature is correct.  It's a good idea to compare checksums, because many installat…
In this article, I will show you HOW TO: Create your first Windows Virtual Machine on a VMware vSphere Hypervisor 6.5 (ESXi 6.5) Host Server, the Windows OS we will install is Windows Server 2016.
Teach the user how to join ESXi hosts to Active Directory domains Open vSphere Client: Join ESXi host to AD domain: Verify ESXi computer account in AD: Configure permissions for domain user in ESXi: Test domain user login to ESXi host:
This video shows you how easy it is to boot from ISO images for virtual machines with the ISO images stored on a local datastore on the ESXi host.
Suggested Courses

749 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question