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Date:      Thu, 20 Jan 2011 17:47:21 +0100
From:      Borja Marcos <borjam@sarenet.es>
To:        freebsd-scsi@freebsd.org
Subject:   mps questions
Message-ID:  <F3197986-1A54-461C-9D95-515348C6A827@sarenet.es>

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Hello,

I''m trying some Dell PERC H200 cards on FreeBSD 8.2 with v28 ZFS. (Not =
a production environment, just running tests).

I have two variants of them. One is an internal one, identified as this =
one.

mps0: <LSI SAS2008> port 0xfc00-0xfcff mem =
0xdf2b0000-0xdf2bffff,0xdf2c0000-0xdf2fffff irq 32 at device 0.0 on pci2
mps0: Firmware: 02.15.63.00
mps0: IOCCapabilities: =
185c<ScsiTaskFull,DiagTrace,SnapBuf,EEDP,TransRetry,IR>
mps0: [ITHREAD]


And another one intended to conect to external SAS devices.

mps1: <LSI SAS2008> port 0xec00-0xecff mem =
0xdf4b0000-0xdf4bffff,0xdf4c0000-0xdf4fffff irq 41 at device 0.0 on pci5
mps1: Firmware: 02.15.63.00
mps1: IOCCapabilities: =
185c<ScsiTaskFull,DiagTrace,SnapBuf,EEDP,TransRetry,IR>
mps1: [ITHREAD]

Both have two SAS ports. And I am trying them on Dell PowerEdge R510 =
servers. I have 8 internal hard disks attached, and a Dell PowerVault =
MD1220 connected to one of the external SAS connectors. The MD1220 has 8 =
hard disks as well.

I haven't configured any logical volumes on the cards, I just want =
unobtrusive SAS cards in order to create ZFS pools on raw disks, and the =
setup is working great, except for one problem:

The *internal* card is showing just six hard disks under FreeBSD, not =
eight.

da0 at mps0 bus 0 scbus0 target 1 lun 0
da1 at mps0 bus 0 scbus0 target 2 lun 0
da2 at mps0 bus 0 scbus0 target 3 lun 0
da3 at mps0 bus 0 scbus0 target 4 lun 0
da4 at mps0 bus 0 scbus0 target 5 lun 0
da5 at mps0 bus 0 scbus0 target 6 lun 0

And this happens no matter how I connect the internal SAS connectors. =
There are two connectors from the disk backplanes to the card, SAS0 and =
SAS1 (I assume they are two buses) and even if I reverse them I still =
see eight disks.=20

However, when booting the system I see eight disks. The controller  BIOS =
lists the backplane device and the eight disks, the FreeBSD boot loader =
says it sees eight disks, but FreeBSD sees just six.

# camcontrol rescan all
Re-scan of bus 0 was successful
Re-scan of bus 1 was successful
# camcontrol devlist
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 1 lun 0 (da0,pass0)
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 2 lun 0 (da1,pass1)
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 3 lun 0 (da2,pass2)
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 4 lun 0 (da3,pass3)
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 5 lun 0 (da4,pass4)
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 6 lun 0 (da5,pass5)
<Alcor Flash Disk 8.07>            at scbus1 target 0 lun 0 (da6,pass6)

The card with the outside facing connectors shows the eight hard disks =
atttached to the MD1120 and the disks. A camcontrol devlist on the =
machine with both mps cards installed I see this:

# camcontrol devlist
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 1 lun 0 (da0,pass0)
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 2 lun 0 (da1,pass1)
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 3 lun 0 (da2,pass2)
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 4 lun 0 (da3,pass3)
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 5 lun 0 (da4,pass4)
<SEAGATE ST3300657SS-H EH02>       at scbus0 target 6 lun 0 (da5,pass5)
<SEAGATE ST9146852SS HT64>         at scbus1 target 1 lun 0 (da6,pass6)
<SEAGATE ST9146852SS HT64>         at scbus1 target 2 lun 0 (da7,pass7)
<SEAGATE ST9146852SS HT64>         at scbus1 target 3 lun 0 (da8,pass8)
<SEAGATE ST9146852SS HT64>         at scbus1 target 4 lun 0 (da9,pass9)
<SEAGATE ST9146852SS HT64>         at scbus1 target 5 lun 0 =
(da10,pass10)
<SEAGATE ST9146852SS HT64>         at scbus1 target 6 lun 0 =
(da11,pass11)
<SEAGATE ST9146852SS HT64>         at scbus1 target 7 lun 0 =
(da12,pass12)
<SEAGATE ST9146852SS HT64>         at scbus1 target 13 lun 0 =
(da13,pass13)
<DELL MD1220 1.01>                 at scbus1 target 36 lun 0 =
(ses0,pass14)
<UT165 USB Flash Disk 0.00>        at scbus2 target 0 lun 0 =
(pass15,da14)


Any ideas? I was wondering if Dell had done something nasty to the =
internal card firmware (mps0 in my example), but seems that the eight =
internal disks are correctly presented to the BIOS.




Thank you,





Borja.




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