Solved

Changing SCSI Bus sharing mode from Physical to None

Posted on 2014-01-06
7
1,060 Views
Last Modified: 2014-01-12
I need to make some configuration changes on one of the SCSI controller which has got 12 RDM attached into the Guest OS (Windows server 2003).

Does that cause any outage or drive letter change to the Operating system ?
what is the impact caused by doing this ?

Thanks.
0
Comment
  • 3
  • 3
7 Comments
 
LVL 117

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE)
Andrew Hancock (VMware vExpert / EE MVE) earned 500 total points
ID: 39761442
To many any changes, to the virtual machine configuration, will require you to shutdown the virtual machine and make the changes. So scheduled downtime will be required.

But changes to the configuration, should not cause any OS issues.

However, before making any changes to any production VM, ensure you have a full VM backup, not a snapshot, mistakes can be made.
0
 
LVL 7

Author Comment

by:Senior IT System Engineer
ID: 39761498
Thanks for the reply,

in this case I cannot make any backup because the backup software failed to take snapshot of this VM (File Server).
0
 
LVL 117
ID: 39761570
You may want to check why, you cannot backup, RDM LUNs, could be the issue.
0
Complete VMware vSphere® ESX(i) & Hyper-V Backup

Capture your entire system, including the host, with patented disk imaging integrated with VMware VADP / Microsoft VSS and RCT. RTOs is as low as 15 seconds with Acronis Active Restore™. You can enjoy unlimited P2V/V2V migrations from any source (even from a different hypervisor)

 
LVL 7

Author Comment

by:Senior IT System Engineer
ID: 39761588
It is, but my concerns is about changing the scsi bus sharing type only ?

Downtime is fine for me, but what happened after I changed the scsi bus type ?
0
 
LVL 117

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE) earned 500 total points
ID: 39761594
No impact to the VM. Often clustered nodes require physical.

Physical - Virtual disks can be shared by virtual machines on any server.

None - Virtual disks cannot be shared by other virtual machines.
0
 
LVL 19

Expert Comment

by:compdigit44
ID: 39766811
If you don't mine me asking what is causing you to change you SCSI mode?  have you check to make sure the mode you are changing to is support by your SAN?
0
 
LVL 7

Author Comment

by:Senior IT System Engineer
ID: 39766834
comp,

THe reason is that the VM was provisioned wrongly :-) a simple mouse click on the "physical" mode prevents the Snapshot of C: drive and also DRS and VMotion.
0

Featured Post

Top 6 Sources for Identifying Threat Actor TTPs

Understanding your enemy is essential. These six sources will help you identify the most popular threat actor tactics, techniques, and procedures (TTPs).

Join & Write a Comment

ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
David Varnum recently wrote up his impressions of PRTG, based on a presentation by my colleague Christian at Tech Field Day at VMworld in Barcelona. Thanks David, for your detailed and honest evaluation!
Teach the user how to rename, unmount, delete and upgrade VMFS datastores. Open vSphere Web Client: Rename VMFS and NFS datastores: Upgrade VMFS-3 volume to VMFS-5: Unmount VMFS datastore: Delete a VMFS datastore:
Teach the user how to convert virtaul disk file formats and how to rename virtual machine files on datastores. Open vSphere Web Client: Review VM disk settings: Migrate VM to new datastore with a thick provisioned (lazy zeroed) disk format: Rename a…

757 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

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now