Smart Array 6404

[Charles Castelain_1]

Hello,

How does the smart 6404 organize the storage when you have two channel each with 7 disks and you want to use 1+0 raid.

Is it stripping on one channel and mirror in between?

Alternative question :
How should I configure my 6404 with 14 disks to get the most I/O of it?

Regards,

C.Castelain

[Steven Clementi]

Charles:

I believe the controller has the "smarts" to see that there are drives on different channels so therefore it does its best to match its mirrors across buses. It may strip across buses as well, but I do not know the exact way it operates.

Generally speaking, you get better I/O performance when you have more disks "grouped" together. Having 2 arrays is better than having 7.

The question you need to answer is... how much data do you need to present to the server in a single logical unit? ALl of the available space? or do you plan on having multiple Logical Units?

Additionally, it would be best if you can utilize multiple buses. You probably have a single MSA30, perhaps a SB model or even a DB model. If you have a DB model, you can utilize 2 of the 4 channels on the 6404. If you get another MSA30DB, you can utilize all 4 channels.


Steven

[Charles Castelain_1]

Hello,

Right now I have no hardware.
I am investigating.

The idea is to run a very large very intensive oltp oracle database.
I mean over 300Gb with 1000 connections
at a time including 100 active user at a time.

My initial idea was :
smart 6404 with the 512Mb cache option
msa30 dual bus
14*146Gb 15krpm drives
create a raid 1+0 on 2 channels.

+ the system installed on its own array.

For what I read I guess you agree with that direction.

Regards,

C.Castelain