[OpenIndiana-discuss] Only one SSD detected on expander
Roy Sigurd Karlsbakk
roy at karlsbakk.net
Wed Oct 17 16:52:32 UTC 2012
it'd be interesting to see what WWN smartctl -l would report from these. I've worked with SATA SSDs in similar setups, but never seen them reported with the same WWN
roy
----- Opprinnelig melding -----
> 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/
> >>>>
> >>>> _______________________________________________
> >>>> OpenIndiana-discuss mailing list
> >>>> OpenIndiana-discuss at openindiana.org
> >>>> http://openindiana.org/mailman/listinfo/openindiana-discuss
> >>>
> >>
> >> _______________________________________________
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> >> http://openindiana.org/mailman/listinfo/openindiana-discuss
> >
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>
> --
> “It is in the admission of ignorance and the admission of uncertainty
> that there is a hope for the continuous motion of human beings in some
> direction that doesn't get confined, permanently blocked, as it has so
> many times before in various periods in the history of man.”
> - Richard P. Feynman
>
>
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Vennlige hilsener / Best regards
roy
--
Roy Sigurd Karlsbakk
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roy at karlsbakk.net
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