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Date: Tue, 19 Mar 2013 18:27:51 +0100
From: Michael Fuckner <michael@fuckner.net>
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Subject: Re: LSI 9260: is there a way to configure it JBOD like mps?
References: <alpine.BSF.2.00.1303192140400.39428@woozle.rinet.ru>
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Am 3/19/2013 7:00 PM, schrieb Tom Evans:
> On Tue, Mar 19, 2013 at 5:45 PM, Dmitry Morozovsky <marck@rinet.ru> wrote:
>> Dear colleagues,
>>
>> I'm currently in process of making new backup server, based on LSI 9260
>> controller.  I'm planning to use ZFS over disks, hence the most natural way
>> seems to configure mfi to JBOD mode - but I can't find easy way to reach this,
>> neither in BIOS utilities nor via MegaCli

there is no such way :(

> 9260 should be SAS-2008 based, so mps(4) not mfi(4).

IMHO 9260 is a megaraid card (with Cache and BBU Option) based on 2108, 
not 2008 Chipset. It is not flashable to an HBA. This wouldn't make 
sense anyway since HBAs are way cheaper than Raid Cards.

I also tried to configure megaraid for ZFS- the good thing is that you 
can make use of the controller cache. The bad thing is: it is very nasty 
to configure: every disk needs to be an own raidset with a Raid0 array. 
When a disk fails- the controller complains about unrecoverable 
raids/volumes. There is nothing like an HBA mode.

I saw Adaptec claims to hace Controllers behaving like an HBA with 
Cache, but I think it still takes some weeks until I have my Card.

Regards,
  Michael!