From: JOSEPH KREMBLAS (JKREMBLAS@REDHEARTGIFTS.COM)
Date: Thu Mar 25 2004 - 10:04:25 EST
Thursday, March 25, 2004
For the sake of clarity, RAID 10 is striping (RAID 0) plus mirroring
(RAID 1); also known as a 0+1 RAID configuration. Please correct me if
I'm wrong.
In response to the question, "Is it possible to make that the primary
disks can only be accessed by A and the secondary pdisks can only be
accessed by B?", I say, "Yes; but why--considering that RAID 10 is
predominantly the application of a mirrored solution?" In essence,
employing a RAID 10 solution to be shared between two nodes is nothing
more than providing a failover solution, to wit, in the event that Host
A goes down, then Host B can take ownership of the RAID 10
array--meaning, taking ownership of the primary disks and its mirrors.
Why would you only want to take ownership of the secondary disks that
I'm calling the "mirrors"?
Am I on track with my assumptions?
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU] On Behalf Of
Ignacio Vidal
Sent: Thursday, March 25, 2004 5:33 AM
To: aix-l@Princeton.EDU
Subject: Re: need solutions when making RAID10 array on 7133
Hello:
I believe that the raid 10 array (in this case) will be seen only by one
of the machines. Doesn't the array belongs to a "loop" owned by
controllers in one of the servers? (I don't remember the ssa
documentation) Regards
Ignacio
> -----Mensaje original-----
> De: cuihh cuihh [mailto:cuihh6@HOTMAIL.COM]
> Enviado el: Wednesday, March 24, 2004 9:01 PM
> Para: aix-l@Princeton.EDU
> Asunto: need solutions when making RAID10 array on 7133
>
>
> two host : A and B
> Both A and B are connect to the same 7133 disk subsystem.
> I want to make an RAID10 array, so I have selected six pdisks to
> construct
>
> the RAID10 array, the first three are defined as the primary disks and
> the
>
> others are defined as the secondary disks.
>
> Is it possible to make that the primary disks can only be accessed by
> A and
>
> the secondary pdisks can only be accessed by B ?
> If it is , Please tell me how .
> Thanks in advance.
>
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