RE: Dual Paths

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• Maybe in reply to: Adam Tomkinson: "Dual Paths"
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Date: Thu, 13 Oct 2005 12:59:18 +0100
To: <sunmanagers@sunmanagers.org>

SUMMARY
=======

Thanks to the following:

Hutin Bertrand, Scott Lawson, Ben Green, Alfredo Deluca, Johan Hartzenberg
& "Out of Office Replies" :-)

Scott Lawson states to issue "cfgadm -la" to see if C1/C2 are both connected
and configured. Here is the output:

# cfgadm -la
Ap_Id Type Receptacle Occupant
Condition
N0.IB7 PCI_I/O_Boa connected configured ok
N0.IB7::pci0 io connected configured ok
N0.IB7::pci1 io connected configured ok
N0.IB7::pci2 io connected configured ok
N0.IB7::pci3 io connected configured ok
N0.SB1 CPU_V2 connected configured ok
N0.SB1::cpu0 cpu connected configured ok
N0.SB1::cpu1 cpu connected configured ok
N0.SB1::cpu2 cpu connected configured ok
N0.SB1::cpu3 cpu connected configured ok
N0.SB1::memory memory connected configured ok
c0 scsi-bus connected configured unknown
c0::dsk/c0t0d0 disk connected configured unknown
c0::dsk/c0t1d0 disk connected configured unknown
c0::dsk/c0t6d0 CD-ROM connected configured unknown
c0::es/ses0 processor connected configured unknown
c0::es/ses1 processor connected configured unknown
c0::rmt/0 tape connected configured unknown
c1 fc-fabric connected configured unknown
c1::210000e08b051f93 unknown connected unconfigured unknown
c1::210000e08b061cc2 unknown connected unconfigured unknown
c1::210000e08b06e9c1 unknown connected unconfigured unknown
c1::500060e8027a5300 disk connected configured unknown
c1::500060e8027a5301 disk connected configured unknown
c1::500060e8027a5302 disk connected configured unknown
c2 fc-fabric connected configured unknown
c2::210000e08b0618c2 unknown connected unconfigured unknown
c2::210000e08b061dc2 unknown connected unconfigured unknown
c2::210000e08b06e8c1 unknown connected unconfigured unknown
c2::210000e08b06ecc1 unknown connected unconfigured unknown
c2::210000e08b09bbf9 unknown connected unconfigured unknown
c2::500060e8027a5310 disk connected configured unknown
c2::500060e8027a5311 disk connected configured unknown
c2::500060e8027a5312 disk connected configured unknown

This together with the fibres(qlc@1/qlc@2) reported via luxadm dis WWN

   Controller /devices/ssm@0,0/pci@1b,700000/SUNW,qlc@1/fp@0,0
   Controller /devices/ssm@0,0/pci@1b,700000/SUNW,qlc@2/fp@0,0

...and from luxadm fcode_download -p

  Found Path to 0 FC/S Cards
  Complete

  Found Path to 0 FC100/S Cards
  Complete

  Found Path to 2 FC100/P, ISP2200, ISP23xx Devices

  Opening Device: /devices/ssm@0,0/pci@1b,700000/SUNW,qlc@1/fp@0,0:devctl
  Detected FCode Version: ISP2200 FC-AL Host Adapter Driver: 1.13
01/03/05

  Opening Device: /devices/ssm@0,0/pci@1b,700000/SUNW,qlc@2/fp@0,0:devctl
  Detected FCode Version: ISP2200 FC-AL Host Adapter Driver: 1.13
01/03/05
  Complete

  Found Path to 0 JNI1560 Devices.
  Complete

All indications are that (from the host) I have two functional fibre ports
connected to the "outside world". Presumably these lead off to the Brocade
switch (not under my control and not zoned ...dohhh), where somone has enabled
multiple paths to the storage(HDS9960)

Thank's to all

Adam

-----Original Message-----
From: sunmanagers-bounces@sunmanagers.org
[mailto:sunmanagers-bounces@sunmanagers.org] On Behalf Of Adam Tomkinson
Sent: Wednesday, October 12, 2005 11:39 AM
To: sunmanagers@sunmanagers.org
Subject: Dual Paths

Hi All,

I have a SF6800 domain attached to a HDS 9960 with what appears to be dual
paths? The server is remotely located and the SAN is not managed by myself
but
by a third party. The third party is going to update the microcode/FW to the
controllers in the 9960 and is sure that we'll not have any problems because
we "should" be dual pathed. I've been asked to confirm that the server can
see
the storage but I'm no SAN expert and as I said before I'm not responsible
for
the assignment of chunks of SAN. so ...

Is it possible to check that the server can see the storage via both
channels
of the Qlogic card and is it possible to know what is configured at the
switch
from the host. I would think not but I stand to be corrected. This is what
info I get from luxadm:

DEVICE PROPERTIES for disk: 500060e8027a5302
  Vendor: HITACHI
  Product ID: OPEN-E-CVS-CM
  Revision: 0119
  Serial Num: 31315
  Unformatted capacity: 35.156 MBytes
  Write Cache: Enabled
  Read Cache: Enabled
    Minimum prefetch: 0x0
    Maximum prefetch: 0x0
  Device Type: Disk device
  Path(s):

  /dev/rdsk/c3t500060E80000000000007A5300000F02d0s2
  /devices/scsi_vhci/ssd@g500060e80000000000007a5300000f02:c,raw
   Controller /devices/ssm@0,0/pci@1b,700000/SUNW,qlc@1/fp@0,0
    Device Address 500060e8027a5302,42
    Host controller port WWN 210000e08b0636c2
    Class primary
    State ONLINE
   Controller /devices/ssm@0,0/pci@1b,700000/SUNW,qlc@2/fp@0,0
    Device Address 500060e8027a5312,42
    Host controller port WWN 210000e08b0602c2
    Class primary
    State ONLINE

I think that clearly shows that there are two ports enabled and attached at
the host but without knowing what's configured at the switch and the 9960,
surely I can't confirm that when they fail it over I won't loose my LUN
(/export/home). Isn't the pathing transparent to the host?

ART
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• Previous message: Piszcz, Justin: "RE: Help - Severe Error With NetBackup Enterprise and Solaris8->Solaris10"
• Maybe in reply to: Adam Tomkinson: "Dual Paths"
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