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Date:      Thu, 20 Oct 2011 10:05:47 -0700
From:      Chuck Swiger <cswiger@mac.com>
To:        Damien Fleuriot <ml@my.gd>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: [zfs-discuss] ZFS on Dell with FreeBSD
Message-ID:  <E6034591-E275-4A6C-B6A2-3BD641C0C95E@mac.com>
In-Reply-To: <4EA05363.5010808@my.gd>
References:  <20111019141443.GQ4592@pcjas.obspm.fr> <CAH7rjyHQEcmiTd6K7VSSFePPa171VrUKGX2nR0D34sOVNzALDg@mail.gmail.com> <20111020094913.GC83424@pcjas.obspm.fr> <4E9FF072.6030104@my.gd> <9B27B4D4-69C8-482A-A918-F77FD03614E3@mac.com> <4EA05363.5010808@my.gd>

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On Oct 20, 2011, at 9:59 AM, Damien Fleuriot wrote:
>> SAS is "serial attached SCSI"; it permits multipath connections to devices and thus is more similar to fibre channel HBAs than SATA, although some SAS controllers will also work with normal SATA drives.
> 
> I know what SAS stands for.

OK.

> My question was, what do they mean by *external* controller ?

It means the connections to the devices are external, rather than being intended for internal devices:

http://www.dell.com/content/topics/topic.aspx/global/products/pvaul/topics/en/us/raid_controller?c=us&l=en&cs=555

> Do you get to provide your own ?

Devices?  Yes.

Regards,
-- 
-Chuck




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