I have had the chance to test Promise Raid and they are pretty fast. True a single controller can control all drives and have the power to do it.
But at the same time the controller is so fast that you can assign 7 drives luns
to each of the controller and assign a 2 drives mirror raid for mdc to one of the controller and it will not much affect the data lun that is on the same ctrl.
Quite better than keeping MDC in data lun and quite better than dedicating a controller to MDC.
On multiple chassis, another story. each config has is story..
Serge
Ordigraphe inc.
2008/5/14 <
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Today's Topics:
1. Re: XSan 2 (TechTalk)
2. Re: FCP Renders on PowerPC Mac, unable to link on Intel Mac
(TechTalk)
3. Re: FCP Renders on PowerPC Mac, unable to link on Intel Mac
(Chris Ribe)
4. Re: XSan 2 (Andr? Aulich)
5. Re: FCP Renders on PowerPC Mac, unable to link on Intel Mac
(Ben Media V)
6. RE: FCP Renders on PowerPC Mac, unable to link on Intel Mac
(Rupert Watson)
7. Re: FCP Renders on PowerPC Mac, unable to link on Intel Mac (Phil)
----------------------------------------------------------------------
Message: 1
Date: Tue, 13 May 2008 18:29:45 -0700
From: TechTalk <email@hidden>
Subject: Re: XSan 2
To: Christopher Dwan <email@hidden>
Cc: email@hidden
Message-ID: <email@hidden" target="_blank" style="color: rgb(0, 0, 204); ">email@hidden>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
On 13-May-08, at 5:16 AM, Christopher Dwan wrote:
>
> * Under XSan 1, you were expected to dedicate an entire RAID
> controller to the metadata partition. This meant that for small
> (single XRAID) configurations, you immediately lost a major portion
> of the available storage. On a single XRAID setup, you lost 50% of
> the notional storage capacity.
One of the advantages of the new Promise RAIDs is, as I understand it,
that one controller can control almost all over the drives/arrays and
the other can be dedicated to the metadata LUN. So no lost drives
(unless you want hot spares). Or you can use all the drives/arrays in
the Promise and use an older Xserve RAID for metadata.
I have not received a unit yet for testing... But I will soon. Then
we'll see.
:)
Mat X
------------------------------
Message: 2
Date: Tue, 13 May 2008 18:31:28 -0700
From: TechTalk <email@hidden>
Subject: Re: FCP Renders on PowerPC Mac, unable to link on Intel Mac
To: Ben Media V <email@hidden>
Cc: email@hidden
Message-ID: <email@hidden" target="_blank" style="color: rgb(0, 0, 204); ">email@hidden>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
