[OpenIndiana-discuss] Only one SSD detected on expander

[Rich]

SATA devices are not required to provide a WWN - I would guess that
they're providing the same WWN, and as a result, your SAS devices are
becoming sad.

If you could tell the expander(s) to ignore that and assign one,
that'd be neat. If there's a firmware update to fix it, even better.
If you want to shell out for SAS -> SATA interposers, that would
probably also solve it, though I can't swear to anything, but that'd
probably be more expensive than returning + replacing the SSDs.

Don't know. If it were me, I'd complain to Samsung support and see
what you got back.

- Rich

On Wed, Oct 17, 2012 at 11:13 AM, Scott Marcy <oi at mscott.org> wrote:
> Well, I enabled multipath support with 'stmsboot -e -D mpt' and rebooted and now it seems I have two paths to what is no doubt two physical devices:
>
> $ mpathadm list LU
>         /dev/rdsk/c7t5002538043584D30d0s2
>                 Total Path Count: 2             <-- Unlikely that this is correct
>                 Operational Path Count: 2
>         /dev/rdsk/c7t5000C5005168B2F0d0s2
>                 Total Path Count: 1
>                 Operational Path Count: 1
>         /dev/rdsk/c7t5000C5005169A612d0s2
>                 Total Path Count: 1
>                 Operational Path Count: 1
>         /dev/rdsk/c7t5000C500517042D9d0s2
>                 Total Path Count: 1
>                 Operational Path Count: 1
>         /dev/rdsk/c7t5000C5005169CC6Ad0s2
>                 Total Path Count: 1
>                 Operational Path Count: 1
>         /dev/rdsk/c7t5000C500515199BDd0s2
>                 Total Path Count: 1
>                 Operational Path Count: 1
>         /dev/rdsk/c7t5000C500513A0EFEd0s2
>                 Total Path Count: 1
>                 Operational Path Count: 1
>
> $ mpathadm show LU /dev/rdsk/c7t5002538043584D30d0s2
> Logical Unit:  /dev/rdsk/c7t5002538043584D30d0s2
>         mpath-support:  libmpscsi_vhci.so
>         Vendor:  ATA
>         Product:  SAMSUNG SSD 830
>         Revision:  3B1Q
>         Name Type:  unknown type
>         Name:  5002538043584d30
>         Asymmetric:  no
>         Current Load Balance:  none
>         Logical Unit Group ID:  NA
>         Auto Failback:  on
>         Auto Probing:  NA
>
>         Paths:
>                 Initiator Port Name:  w500605b0054819b0
>                 Target Port Name:  w5002538043584d30
>                 Override Path:  NA
>                 Path State:  OK
>                 Disabled:  no
>
>                 Initiator Port Name:  w500605b0054819b0
>                 Target Port Name:  w5002538043584d30
>                 Override Path:  NA
>                 Path State:  OK
>                 Disabled:  no
>
>         Target Ports:
>                 Name:  w5002538043584d30
>                 Relative ID:  0
>
> And cfgadm still only shows one SSD on each expander, when I actually have two on each expander.
>
> $ cfgadm -al
> Ap_Id                          Type         Receptacle   Occupant     Condition
> c6                             scsi-sas     connected    configured   unknown
> c6::es/ses0                    ESI          connected    configured   unknown
> c6::smp/expd0                  smp          connected    configured   unknown
> c6::w5002538043584d30,0        disk-path    connected    configured   unknown
> c6::w5000c500513a0efe,0        disk-path    connected    configured   unknown
> c6::w5000c5005168b2f0,0        disk-path    connected    configured   unknown
> c6::w5000c5005169a612,0        disk-path    connected    configured   unknown
> c6::w5000c5005169cc6a,0        disk-path    connected    configured   unknown
> c6::w5000c500515199bd,0        disk-path    connected    configured   unknown
> c6::w5000c500517042d9,0        disk-path    connected    configured   unknown
> c8                             scsi-sas     connected    configured   unknown
> c8::es/ses1                    ESI          connected    configured   unknown
> c8::smp/expd1                  smp          connected    configured   unknown
> c8::w5002538043584d30,0        disk-path    connected    configured   unknown
> c9                             scsi-sas     connected    unconfigured unknown
>
> I also wonder if there might be an issue with duplicate initiator-port names:
>
> $ mpathadm list initiator-port
> Initiator Port:  w500605b0054819b0
> Initiator Port:  iqn.1986-03.com.sun:01:bb4db0fbffff.507ec650,4000002a00ff
> Initiator Port:  w500605b0054819b0
>
> Although I'm definitely venturing outside my knowledge base here--maybe this is expected and correct. (I assume each initiator-port represents an expander, but both expanders are connected to the one HBA, one to each SFF-8087 port. Also, I do have comstar running, which I expect explains the iSCSI initiator in this list.)
>
> -Scott
>
> On Oct 17, 2012, at 8:37 AM, Scott Marcy <mscott at mscott.org> wrote:
>
>> No, multipath support is disabled. I will try enabling it with stmsboot.
>>
>> Thanks.
>>
>> -Scott
>>
>> On Oct 17, 2012, at 8:15 AM, Bob Friesenhahn <bfriesen at simple.dallas.tx.us> wrote:
>>
>>> On Wed, 17 Oct 2012, Scott Marcy wrote:
>>>>
>>>> Note that both c6 and c8 have the exact same name for these drives. I *CAN* access the two drives separately, but why on earth am I getting these duplicates? This means I can only reliably access one Samsung SSD per expander.
>>>
>>> Do you have multipath support enabled on this system?  I assume that the default for OpenIndiana x86 is still that multipath support is disabled by default.
>>>
>>> Bob
>>> --
>>> Bob Friesenhahn
>>> bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
>>> GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
>>>
>>> _______________________________________________
>>> OpenIndiana-discuss mailing list
>>> OpenIndiana-discuss at openindiana.org
>>> http://openindiana.org/mailman/listinfo/openindiana-discuss
>>
>
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