Re: mpt2sas: bug in disk ordering?

[Caspar Smit <c.smit@truebit.nl>]

Kashyap,

But when i use a LSI 3081E-R HBA (mptsas driver) the disk ordering is
ALWAYS the same, and always in correct order.
I would like to keep that functionality when upgrading to the newer 9211-8i HBA.

Kind regards,

Caspar Smit

2011/5/13 Desai, Kashyap <Kashyap.Desai@lsi.com>:
> Smit,
>
> Disk ordering is not done by mpt2sas driver.
> Ordering is purely depend upon How FW discovers drivers and repots it to Driver.
>
> e.a if you have slow spinning driver at slot-0, it can be reported by FW at the end, though it is attached to slot-0.
>
> In summary, Disk ordering is not guaranteed.
>
> ~ Kashyap
>
>> -----Original Message-----
>> From: linux-scsi-owner@vger.kernel.org [mailto:linux-scsi-
>> owner@vger.kernel.org] On Behalf Of Caspar Smit
>> Sent: Friday, May 13, 2011 4:04 PM
>> To: linux-scsi@vger.kernel.org
>> Subject: Re: mpt2sas: bug in disk ordering?
>>
>> Hello again,
>>
>> I tried with Debian Squeeze with the latest backports kernel 2.6.38,
>> which has mpt2sas version 07.100.00.00
>> and now the disks are ordered this way:
>>
>> /dev/sdb = slot 3
>> /dev/sdc = slot 2
>> /dev/sdd = slot 1
>> /dev/sde = slot 0
>> /dev/sdf = slot 7
>> /dev/sdg = slot 6
>> /dev/sdh = slot 5
>> /dev/sdi = slot 4
>>
>> So there's more consistency here but still ordered backwards (per port)
>>
>> Kind regards,
>>
>> Caspar Smit
>>
>>
>> 2011/5/13 Caspar Smit <c.smit@truebit.nl>:
>> > Hi all,
>> >
>> > I'm having a minor issue with the disk ordering using an LSI 9211-8i
>> > (mpt2sas) controller.
>> >
>> > If i go into the controllers SAS config utility during boot I can
>> > identify the disks in the slots.
>> >
>> > disk 0 -> slot 0, disk 1 -> slot 1, etc.. everyhting is fine.
>> >
>> > When I boot into debian linux lenny (using the latest backports
>> > 2.6.32-31 kernel, this kernel has version 02.100.03.00 of the mpt2sas
>> > driver)
>> >
>> > The disks are ordered this way:
>> >
>> > /dev/sda = internal SSD connected to the MB
>> >
>> > /dev/sdb = slot 0
>> > /dev/sdc = slot 1
>> > /dev/sdd = slot 2
>> > /dev/sde = slot 3
>> > /dev/sdf = slot 7 (!)
>> > /dev/sdg = slot 4
>> > /dev/sdh = slot 5
>> > /dev/sdi = slot 6
>> >
>> > So it seems the first 4 disks connected to SAS port 1 are ordered
>> > correctly and the last 4 disks are not.
>> >
>> > When I check /dev/disk/by-path i see the following:
>> >
>> > lrwxrwxrwx 1 root root   9 2011-05-13 10:52 pci-0000:04:00.0-sas-
>> > 0x500605b001d161b0:1:0-0x4433221103000000:0 -> ../../sdb
>> > lrwxrwxrwx 1 root root   9 2011-05-13 10:52
>> > pci-0000:04:00.0-sas-0x500605b001d161b0:1:1-0x4433221102000000:0 ->
>> > ../../sdc
>> > lrwxrwxrwx 1 root root   9 2011-05-13 10:52
>> > pci-0000:04:00.0-sas-0x500605b001d161b0:1:2-0x4433221101000000:0 ->
>> > ../../sdd
>> > lrwxrwxrwx 1 root root   9 2011-05-13 10:52
>> > pci-0000:04:00.0-sas-0x500605b001d161b0:1:3-0x4433221100000000:0 ->
>> > ../../sde
>> > lrwxrwxrwx 1 root root   9 2011-05-13 10:52
>> > pci-0000:04:00.0-sas-0x500605b001d161b0:1:4-0x4433221104000000:0 ->
>> > ../../sdf
>> > lrwxrwxrwx 1 root root   9 2011-05-13 10:52
>> > pci-0000:04:00.0-sas-0x500605b001d161b0:1:5-0x4433221107000000:0 ->
>> > ../../sdg
>> > lrwxrwxrwx 1 root root   9 2011-05-13 10:52
>> > pci-0000:04:00.0-sas-0x500605b001d161b0:1:6-0x4433221106000000:0 ->
>> > ../../sdh
>> > lrwxrwxrwx 1 root root   9 2011-05-13 10:52
>> > pci-0000:04:00.0-sas-0x500605b001d161b0:1:7-0x4433221105000000:0 ->
>> > ../../sdi
>> >
>> > This LOOKS as it should but right now it is not really correct
>> because
>> > 1:7 indicates that it should be physical slot 7 (sdi is in slot 6 and
>> > not in slot 7)
>> >
>> > When i use the sas2ircu command line util to LOCATE the disks and I
>> > use 1:7 to locate, slot 7 lights up (NOT disk sdi)
>> >
>> > Is this behavior fixed in a newer version of the driver, and if so
>> > what is the corresponding patch to fix this?
>> >
>> > Kind regards,
>> >
>> > Caspar Smit
>> >
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