[OpenIndiana-discuss] Multiple devices appearing as one behind SAS expander

[Sašo Kiselkov]

On 03/21/2013 02:13 PM, Schweiss, Chip wrote:
> I have four 480GB SSDs I'm trying to re-add to my pool as L2ARC.   They
> were all connected internally on the server, but now I have a dedicated SAS
> JBOD for the 2 1/2 SSDs in the system.   The JBOD is a SuperMicro 2U with
> LSI SAS2X36 expander.
> 
> The SSDs are are all showing up as a single device: c11t0000120000000000d0s0
> 
> They are incorrectly identified as the same device by the multipathadm:
> 
> mutipathadm list lu:
> 
>         /dev/rdsk/c11t0000120000000000d0s2
>                 Total Path Count: 4
>                 Operational Path Count: 4
> 
> Not sure where napp-it gets its information for it's controller view but
> this is how it reports them:
> 
>  c14::w5003048001d91b4e,0   connected   configured   unknown   Client
> Device: /dev/dsk/c11t0000120000000000d0s0(sd75) disk-path n /devices/pci at 0
> ,0/pci8086,340e at 7/pci1000,30d0 at 0/iport at f000:scsi::w5003048001d91b4e,0
>  c14::w5003048001d91b4f,0   connected   configured   unknown   Client
> Device: /dev/dsk/c11t0000120000000000d0s0(sd75) disk-path n /devices/pci at 0
> ,0/pci8086,340e at 7/pci1000,30d0 at 0/iport at f000:scsi::w5003048001d91b4f,0
>  c14::w5003048001d91b5a,0   connected   configured   unknown   Client
> Device: /dev/dsk/c11t0000120000000000d0s0(sd75) disk-path n /devices/pci at 0
> ,0/pci8086,340e at 7/pci1000,30d0 at 0/iport at f000:scsi::w5003048001d91b5a,0
>  c14::w5003048001d91b5b,0   connected   configured   unknown   Client
> Device: /dev/dsk/c11t0000120000000000d0s0(sd75) disk-path n /devices/pci at 0
> ,0/pci8086,340e at 7/pci1000,30d0 at 0/iport at f000:scsi::w5003048001d91b5b,0
> 
> How do I break this and get OI to see these as 4 independent devices?

These are SATA SSDs, I presume. Are they attached to the SAS array via
an interposer board?

http://www.lsi.com/products/storagecomponents/Pages/LSISS9252.aspx

--
Saso