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TheWizardUk
Contributor
Contributor

ESXI 5.1, NAS, RAID 5

Hello All

I am fairly new to ESXI so I apologies in advanced if this has already been covered or is a stupid question.

I have recently got myself a HP Microserver running ESXI 5.1 (via a USB pen drive) it currently only has one HDD (250GB Sata installed) I have a few VMs running and everything is great.

I wanted to use the additional 4 bays available on the hp microserver and set up a NAS box with some redundancy so software raid 5.

So I starting thinking how I could link it all together, my first thoughts were to add the 4 disks to the datastore then set up a VM such as FreeNas or Openfiler  adding the disks to VM then setting up the software raid within this environment. But I believe doing it this way i would have slow read / write speeds and also no visibility of the S.M.A.R.T status of the disks?

So i then started to look into setting up the RAID directly on ESXI via mdadm thinking  i could then set up a vm system (such as nagios) to report on the SMART status however as ESXI is not derived from a Linux kernel this is not an option.

Am I overlooking something here? And is there an easy option so configer software RAID within this environment?

Thank you all in advanced

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Sreejesh_D
Virtuoso
Virtuoso

Welcome to communities!!

i would recommend adding the additional 4 disks RDM disks to the Openfiler or FreeNAS VM. This way you will get better Read and write performance.

The following KB will help you in setting up RDMs in HP micro server. Also it has beautiful report on comparison between RDM and VMFS performance.

http://forza-it.co.uk/esxi-5-1-using-raw-device-mappings-rdm-on-an-hp-microserver/

the following whitepaper will help you in configuring Openfiler as VM.

http://www.vmwarehub.com/Openfiler%20Configuration.pdf

TheWizardUk
Contributor
Contributor

Thank you Yezdi very useful - RDM seem like the right way for me to go with this. Do you know if the NAS distro i.e openfiler can report on the SMART status of the disk when using RDM?

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Sreejesh_D
Virtuoso
Virtuoso

I am not sure completely. I believe its available. See the following link.

http://www.zartl.info/?p=139

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