Solved

To have hard drive or not to have hard drive on a host server?

Posted on 2014-04-02
2
387 Views
Last Modified: 2014-04-08
In a server virtualization project, we plan using  three host servers running ESXi on SD card instead of on hard drive. The concern is, what if the flash media gets failed. After all, two mirrored hard drives can sustain this kind of failure.

So to have hard drive or not to have hard drive? Appreciate your comments.
0
Comment
Question by:Castlewood
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 88

Assisted Solution

by:rindi
rindi earned 100 total points
ID: 39973386
If the card fails, just replace it with another. You could make a copy of the first card so after the card is changed you are ready to go.

Besides, as those cards hardly get written to, and they are only needed to boot the system (everything is loaded to RAM), they hardly get used and so should last for long.
0
 
LVL 120

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 400 total points
ID: 39973633
Here is the VMware KB on installing 5.x on USB/SD:
http://kb.vmware.com/kb/2004784

We've been installing ESXi onto USB flash drives and SD cards for over ten years now, and not a single installation has failed.

Purchase good quality SD Cards, USB flash drives, e.g. SanDisk, Kingston, HP.

The installation media, is only used to boot the server, so how many times, are you going to boot them, the OS, then goes memoery resident.

We've seen more issues with hard drive mirrored installations, over the years than failed usb or SD card fl;ash drives (the internet runs on Cisco routers, and the routers boot from flash!).

You should not compare USB or SD cards in the way they are used in cameras or PCs, where they are constantly inserted in and out of devices, and generally abused.

You media will sit in the server, and stay there.

If you want to take a backup, please see my EE Article

How to Backup an ESXi installation on an USB Flash Drive or SD card, for security or redundancy.

with the latest ESXi 5.5 you will want to use the following to make a backup...

http://www.alexpage.de/usb-image-tool/

One other tool, you can use is the vCLI scripts which can be used to backup and restore the configuration of ESXi 5.5, so it can be restored to a vanilla installation, in seconds..

see here

https://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vcli.ref.doc%2Fvicfg-cfgbackup.html
0

Featured Post

MIM Survival Guide for Service Desk Managers

Major incidents can send mastered service desk processes into disorder. Systems and tools produce the data needed to resolve these incidents, but your challenge is getting that information to the right people fast. Check out the Survival Guide and begin bringing order to chaos.

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…
Is your company's data protection keeping pace with virtualization? Here are 7 dynamic ways to adapt to rapid breakthroughs in technology.
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.
In this video tutorial I show you the main steps to install and configure  a VMware ESXi6.0 server. The video has my comments as text on the screen and you can pause anytime when needed. Hope this will be helpful. Verify that your hardware and BIO…

734 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