Re: mpt2sas: bug in disk ordering?

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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@xxxxxxxxxx>:
> 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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