OmniStack 4.1.2 Dual disk resiliency

[gogalai]

Hello

Due to what, the new feature "Dual disk resiliency", is implemented in new omnistack version 4.1.2? Is it raid6? there are not two tires of tsorage?

[support_s]

System recommended content:

1. HPE OmniStack 4.1.1U1 for vSphere Upgrade Guide

2. HPE OmniStack 4.1.0 for vSphere Administration Guide.

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[gogalai]

This guides are for previous versions. there is nothing about "Dual disk resiliency" and raid levels.

[MikeSeden]

Try these-
https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=a00123771en_us

https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-a00123773en_us

https://support.hpe.com/hpesc/public/docDisplay?docId=a00117319en_us

These are the 4.1.2 Admin, Release notes and interop guide. 

[gogalai]

There is no information about my question in this guides.

[MikeSeden]

Where are you seeing "Dual Disk Resiiency"?

[gogalai]

In the "HPE OmniStack 4.1.2 for vSphere Release Notes"

"The Deployment Manager is upgraded to enable dual disk resiliency selection when available. You can select disk resiliency to allow Software Optimized platforms to sustain dual disk failures within the same disk group, which is a key difference between Software Optimized and Hardware Accelerated HPE SimpliVity platforms. The functionality also allows for existing deployments with single disk resiliency to be able to upgrade to dual disk resiliency by way of redeployment (no in place upgrade for existing data)."

[MikeSeden]

Let's look at the statement "You can select disk resiliency to allow Software Optimized platforms to sustain dual disk failures within the same disk group, which is a key difference between Software Optimized and Hardware Accelerated HPE SimpliVity platforms."  Before you were able to lose one disk in a disk group. Now you can lose two. As I understand, you can upgrade an existing single disk to dual disk by redeploying. SimpliVity is able to do that partly because of moving to the software based Acceleration from the hardware TIA card.

[gogalai]

my question is how is it realized. by creatind raid6, or how?

[kerrplunk77 · Accepted solution]

It's provided through RAID6 and RAID 10ADM for 380G x6, x12 and x16 nodes (not x8). Implemented at deployment only, is optional and recommended for scenarios that would be more vulnerable to extended break/fix times i.e. dark sites, ships, rigs etc.

[Deepak_K]

Hi Gogalai,

Please refer page no. 28-29 in the below 4.1.2 Deployment Guide which provides you more information on Dual Disk Resiliency and SimpliVity models which supports Dual Disk Resiliency:

https://support.hpe.com/hpesc/public/docDisplay?docId=emr_na-a00123772en_us.

As informed earlier, the type of RAID configured are combination of RAID10ADM & RAID6.

Tier1 - RAID10ADM

Tier2 - RAID6 

Other reference documents link:

https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=a00125704en_us

Thanks & Regards

Deepak