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Re: MSA1500 - Active/Active Yet?

 
Vincent Fleming
Honored Contributor

Re: MSA1500 - Active/Active Yet?

In all (midrange) arrays, only one controller actually does writes to a set of RAID disks.

They do this because of the overhead that would be required to coordinate activities between the controllers would be so much that it is not worth doing - there would be no benefit to the scheme. Maintaining cache coherency and locking are the most heavyweight activities.

So, what's typically done is I/O's are forwarded to the "owner" controller, thereby removing the need for cache coherency and locking.
No matter where you go, there you are.
Basil Vizgin
Honored Contributor

Re: MSA1500 - Active/Active Yet?

MSA is entry-level array. All midrange EVAs, as I understand, can do cache mirroring and both controllers can work simultaneously (LUN balancing).
John Kufrovich
Honored Contributor

Re: MSA1500 - Active/Active Yet?

The MSA will support both methods, Automatic and Manual(preferred_path).

In the Automatic mode, the first controller will proxy over cmds to the second controller. If that LUN on the second controller gets busy, the FW will automatically move that LUN under the first controller.

In Manual mode, you will be able to select which controllers get which LUNs.



Basil Vizgin
Honored Contributor

Re: MSA1500 - Active/Active Yet?

Thank you, John!

And what about MSA1000? When planned active/active fw for MSA1000?
Jefferson Humber
Honored Contributor

Re: MSA1500 - Active/Active Yet?

Basil,

I thought I read on here a little while ago that was still coming to the MSA1000, but maybe not until v.6 for the F/W. Might of dreamt it, but I'm sure I sure it somewhere here.

Jeff
I like a clean bowl & Never go with the zero
Jefferson Humber
Honored Contributor

Re: MSA1500 - Active/Active Yet?

Basil,

I thought I read on here a little while ago that it was still coming to the MSA1000, but maybe not until v.6 for the F/W. Might of dreamt it, but I'm sure I sure it somewhere here.

Jeff
I like a clean bowl & Never go with the zero
DanDelcroix
Occasional Advisor

Re: MSA1500 - Active/Active Yet?

Any update on the release for the active/active FW for the MSA1000 and/or MSA1500 ?
Thanks and regards,
Vermaanen
Fabian_Nowee
Super Advisor

Re: MSA1500 - Active/Active Yet?

Jep, we're testing with 5.02 but we see no active/active components yet.
Looking for nice incentives? (www.kirsp.nl)
Basil Vizgin
Honored Contributor

Re: MSA1500 - Active/Active Yet?

Found this new documents:
HP MPIO Full-Featured DSM for Windows for MSA Disk Arrays 1.00.00 release notes
http://search.hp.com/redirect.html?type=REG&qt=mpio&url=http%3A//h20000.www2.hp.com/bc/docs/support/SupportManual/c00586805/c00586805.pdf&pos=1
and HP MPIO Full-Featured DSM for Windows for MSA Disk Arrays 1.00.00 installation and reference guide:
http://search.hp.com/redirect.html?type=REG&qt=mpio&url=http%3A//h20000.www2.hp.com/bc/docs/support/SupportManual/c00586802/c00586802.pdf&pos=9

From release notes:
-----
The HP MPIO MSA DSM supports the following disk array:
├в ┬в MSA1500 with firmware version 6.x.
Coexistence with Secure Path on same server* Yes
Coexistence with HP MPIO basic failover for EVA arrays on same server* Yes
Coexistence with HP MPIO basic failover for MSA arrays on same server* No
---
Release day is coming?:)
Basil Vizgin
Honored Contributor

Re: MSA1500 - Active/Active Yet?

John, any news yet?