Some thoughts 'bout scsi controllers

[Scott Long]

Nico -telmich- Schottelius wrote:
> Hello Scott,
> 
> Scott Long [Thu, Jun 07, 2007 at 04:25:38AM -0600]:
>> Nico -telmich- Schottelius wrote:
>>> - amr: the 'old' megaraid (=lsi) scsi (parallel)/sata driver: Seems to
>>>  be also one of the recommended chips, though there where/are issues
>>>  about unmaintained lsi drivers
>> Excuse me?  I'm the maintainer of this driver, and I've never heard
>> from you.
> 
> That's true. My information from
> http://lists.freebsd.org/pipermail/freebsd-scsi/2005-January/001630.html
> is outdated in that case. Sorry for the confusion.
> 

Ah yes, things have changed significantly in the past 2.5 years =-)

>>> We are looking on several servers and variants to replace the broken 
>>> sc1425 with the
>>> 39320 in it. I think one option would be a dell pe2950 (with perc5i/mfi)
>>> or to get a mpt or amr supported u320 card.
>> The MPT and AMR cards are not equivalent.
> 
> Which of those both would you recommened to use?

MPT is a SCSI controller that has some basic raid 0 and 1 capabilities.
AMR is a full scale RAID accelerator that is designed with enterprise
data protection in mind.  In other words, one is a SCSI chip, the other
is a RAID card.

Scott