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Date:      Wed, 7 May 2014 10:59:14 +0200
From:      Borja Marcos <borjam@sarenet.es>
To:        freebsd-scsi@freebsd.org
Subject:   Testing new mpr driver
Message-ID:  <8A41AB90-AC2F-4200-91D6-3D3CF9E8A835@sarenet.es>

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Hi

I just saw that there's a new driver for LSI3008 SAS3 cards. I have =
updated a test system to -STABLE, installed one of those cards (in this =
case, the OEM version sold by IBM as a HBA, with IT firmware).

mpr0: <LSI SAS3008> port 0x3f00-0x3fff mem 0x912f0000-0x912fffff irq 32 =
at device 0.0 on pci17




Excellent so far I have noticed a difference with the mps based LSI2008 =
cards: in the same hardware configuration as my previous tests (except, =
of course, the HBA) it seems to be faster. And I am using just one cable =
to connect the HBA to the backplane instead of two, I didn't have =
another cable available.

<ATA Samsung SSD 840 BB0Q>         at scbus0 target 25 lun 0 (pass0,da0)
<ATA Samsung SSD 840 BB0Q>         at scbus0 target 26 lun 0 (pass1,da1)
<ATA Samsung SSD 840 BB0Q>         at scbus0 target 27 lun 0 (pass2,da2)
<ATA Samsung SSD 840 BB0Q>         at scbus0 target 28 lun 0 (pass3,da3)
<ATA Samsung SSD 840 BB0Q>         at scbus0 target 29 lun 0 (pass4,da4)
<ATA Samsung SSD 840 BB0Q>         at scbus0 target 30 lun 0 (pass5,da5)
<ATA Samsung SSD 840 BB0Q>         at scbus0 target 33 lun 0 (pass6,da6)
<ATA Samsung SSD 840 BB0Q>         at scbus0 target 34 lun 0 (pass7,da7)
<ATA Samsung SSD 840 BB0Q>         at scbus0 target 35 lun 0 (pass8,da8)
<IBM-ESXS SAS EXP BP 61A6>         at scbus0 target 263 lun 0 =
(pass9,ses0)
<IBM-ESXS SAS EXP BP 61A6>         at scbus0 target 288 lun 0 =
(pass10,ses1)

I have created a ZFS pool with the SSDs. With the LSI2008 based card I =
needed to run several bonnie++ instances in parallel in order to =
saturate the I/O bandwidth, and with this card a single instance reaches =
peak performance.=20

Does it make sense at all?

I assume that the driver could be considered almost production ready. Is =
it going to be included in 9.3 as well, as the manpage states, or is it =
a typo?


Thanks!





Borja.





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