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VA disk space

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Lee Huei
Regular Advisor

VA disk space

Hi all,

I have a query on how VA utilising its harddisk.

I have a VA with 4x36Gbytes hdd
out of the total hdd size, only 40Gbytes of harddisk space is available, the rest are reserved for hotspare & redundancy.

Understand that this is how VA configuration works.
could anyone help explains in detail how the disk space being configured for redundancy & hotspare?

Thanks in advance :)
7 REPLIES
Adisuria Wangsadinata_1
Honored Contributor
Solution

Re: VA disk space

Hi there,

the hotspare & redundancy is the features for HA performance, this can be disable BUT you must say 'bye-bye' for the HA features on your VA 8-).

other information about this will be send directly to you.

Best Regards,
AW
now working, next not working ... that's unix
Lee Huei
Regular Advisor

Re: VA disk space

Thanks. The information sent directly to me helps a lot and clear all my doubts :)
Adisuria Wangsadinata_1
Honored Contributor

Re: VA disk space

The information from docs.hp.com :
goto 'Storage Solutions'
goto 'Storage Area Management'
goto 'hp virtual array systems'

Hope this information can help you also.

Best Regards,
AW
now working, next not working ... that's unix
Steven E. Protter
Exalted Contributor

Re: VA disk space

It is possible to set up all four disks and present them to the OS. Then if you have it, you can use mirror/us software redundancy. You won't get quite as much space as the standard VA radi setup, but you'll get great performance and reliablity.

SEP
Steven E Protter
Owner of ISN Corporation
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Peter Mattei
Honored Contributor

Re: VA disk space

Uups, you missed the point that the VA has a built in RAID controller. You cannot present disk directly by bybassing the controller.
You probably think of a DS2405 which can be used by a VA7410 as extension unit only!

Cheers
Peter
I love storage
Sijesh
Advisor

Re: VA disk space

VA got 2 RAID levels RAID1+0 and AutoRAID.
(Default is AutoRAID).Avilable space depends on RAID level

Also it uses some disk space for its 'maps'.

Sijesh

Uwe Zessin
Honored Contributor

Re: VA disk space

I don't think that is correct, Sijesh.

The 'hp StorageWorks virtual arrays va 7000 -family user and service guide' (A6183-96005) from January 2003 says it is the other way.

The array can be changed from RAID 1+0 to AUTORAID online, but a switch in the other direction requires a complete reformat of the array. RAID-5DP is more space efficient than RAID 1+0. It is pretty unlikely that there is enough space in an array for such a switch once it has started migrating data to RAID-5DP.
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