[OpenIndiana-discuss] Only one SSD detected on expander
Scott Marcy
oi at mscott.org
Wed Oct 17 16:33:12 UTC 2012
Ah, I see now. Yes, all the drives report the same LU WWN Device Id in smartctl, and I see the same constant WWN reported online (for example, http://blog.gmane.org/gmane.linux.utilities.smartmontools.database/page=7). I'll see what Samsung has to say.
Thanks! This at least gives me more to work from.
-Scott
On Oct 17, 2012, at 10:13 AM, Rich <rercola at acm.jhu.edu> wrote:
> 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/
>>>>
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>>>
>>
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