Solved

Recommendations for Vdisk and volume configuration on HP P2000 G3 iSCSI for VMware ESXi 5.1

Posted on 2014-12-03
4
1,004 Views
Last Modified: 2014-12-03
Hello,

We currently have 1 Vdisk configured on an HP P2000 G3 iSCSI MSA Dual Controller SAN used by 2 x VMware ESXi hosts.

The existing Vdisk (not created by us) is a RAID 5 array made up of 7 x 300GB 15K drives with 1 spare giving 1.8TB of space

There are 3 volumes of 500GB mapped to the VMware hosts, leaving 300GB of free space. Would this free space have been left for a reason?

We now need to add more space and an additional VMware physical host to increase the amount of VMs we can create.

We have added 16 disks to the SAN enclosure, 8 x 300GB 15K and 8 x 600GB 10K SFF drives

The plan is to create 2 additional Vdisks:

RAID 10 with 8 x 300GB 15K drives giving 1.2 TB of space for VMs requiring higher storage performance

RAID 5 with 7 x 600GB 10K drives giving 3.6TB of space, with the remaining 1 x 600GB drive assigned as a global spare - this would be used for general file storage

We are stuck at the point of creating the volumes under each new Vdisk.

Should we create one big volume or divide into chunks?
Should any free space be left like on our original Vdisk?

Many thanks in advance for your help and suggestions

Original Vdisk
Volumes
0
Comment
Question by:neilfreeman
  • 2
  • 2
4 Comments
 
LVL 119

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 40479191
The only reason I can see to leave space, is so the LUN can be expanded in the future, if required on the datastore.

It depends how you want to allocate all the space, in the vdisk, usually we allocate it all, and leave none spare.

we like to split into chunks, between 500-800GB, unless we need supersize LUNs for large VMs.
0
 

Author Comment

by:neilfreeman
ID: 40479300
Many thanks for your response

Regarding the LUNs am I OK to assign more than one VM to each one (size permitting)? I know it is probably difficult to give an exact specification without seeing the environment but as a general rule what would you say the maximum is?

Thanks again for your help

Neil
0
 
LVL 119
ID: 40479318
Yes, we generally have between 5 - 10 VMs per LUN

but try not to put the same type of VM per LUN

e.g. do not put two SQL servers, or two Domain Cointrollers, Two terminal servers etc
0
 

Author Closing Comment

by:neilfreeman
ID: 40479336
Thank you very much, that was exactly what we were looking for!
0

Featured Post

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)

Question has a verified solution.

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

This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
Is your phone running out of space to hold pictures?  This article will show you quick tips on how to solve this problem.
Advanced tutorial on how to run the esxtop command to capture a batch file in csv format in order to export the file and use it for performance analysis. He demonstrates how to download the file using a vSphere web client (or vSphere client) and exp…
This video shows you how to use a vSphere client to connect to your ESX host as the root user. Demonstrates the basic connection of bypassing certification set up. Demonstrates how to access the traditional view to begin managing your virtual mac…

831 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