Want to creare RAID 0+1 on EVA4400

[Aungshuman Paul]

Hi,

Can anyone help on following issue :

I want to create VRAID10 ( RAID 1+0). But I did not find any option on Command View EVA for create VRAID10.

Waiting for reply.

Aungshu

[Torsten.]

The vraid1 is what you are looking for.

[Aungshuman Paul]

But in the Quick Spec. See attached doc ( page 3) Vraid1, Vraid 0+1 mention separatly.

But in the Command View EVA we found only VRAID0, VRAID1, VRAID5 and VRAID6.

That made us confused. Any idea?

Aungshu

[Torsten.]

I don't know what should be the difference between raid1 and raid0+1 on an eva.

However, the specs are likely the only source that mentioned these raid levels, but I'm only aware of vraid0, vraid1, vraid5 and depending on FW level vraid6.

[Aungshuman Paul]

We create VRAID1. But customer refer us this document and want to create VRAID0+1.

But I did not find any option for create it.

So totally confused . And dont know how to convinced customer.

Aungshu

[Torsten. · Accepted solution]

In general a RAID1 is a mirrored disk, a RAID0+1 or RAID10 is usually a striped mirrored disk.


A vraid1 is always a striped mirrored disk (using all disks in a disk group), so you can compare to a RAID0+1.

[Steven Clementi]

vRAID6 may also be available on your 4400 depending upon the firmware version.

As stated.. vRAID1 on the EVA is effectively RAID0+1.


Steven

[Torsten.]

There are some documents about this on the web, for example

http://www2.openvms.org/kparris/eva_intro.ppt

(old but still valid)

or just search for something like

"eva distributed virtual raid"

[Aungshuman Paul]

Can we declare any hot spare disk in EVA?

[Torsten.]

No dedicated disk, but reserved space on all disks (protection level).

[Daniel_279]

On the EVA product range, data is spread across all disks in a disk group. So there is no difference between vraid1 and vraid0+1. vraid1 on EVA implies varid0+1

Vraid0 - one copy of the data is spread across all the disks in a disk group.
Vraid1 - two copies of the data is spread across all the disks in a disk group

[CLEB]

Latest quick specs:

http://tiny.cc/i92x5

[Oscar_Maimó]

When you set the protection level it means:
Single: The firmware reserve a space = twice the largest disk drive in the group. This space is distributed among all disk in the group to make faster the leveling.
Doble:The same, but it reserve double space than single.
How ever, if you have enough free space in a group, the EVA will use it before sapare.

If the answer is helpful, please submit points.
Ah, please visit my blog, to include it in search engines indexes :)
Greetings
Oscar Maimó
http://oscarmaimo.blogspot.com

[Aungshuman Paul]

Thanks. I understod about EVA's VRAID. Thanks everyone for participate in my thread.

[Karmak Inc]

What is the larged RAID 0+1 drive I can create on an EVA4400 and present to a VMS Integrity server runnung 8.3-1H1?

[Uwe Zessin]

As far as I know, 1023GB (I would NOT use an 1024GB vDisk!) and the limit was raised to 2047GB in 8.4.