Asset ID:	1-71-1002465.1
Update Date:	2009-10-08
Keywords:

---

Solution Type  Technical Instruction Sure

Solution  1002465.1 :   Verifying STMS (mpxio) Health  


PreviouslyPublishedAs
203438

Description
In order to provide you the most accurate fix, please validate that each statement under the symptoms below is true for your environment. These symptoms will hyperlink you into a relevant content that will 1) tell you how to validate the listed symptom and 2) how to fix the symptom if it is true for your environment. The listed symptoms are ordered in the most appropriate sequence to isolate the issue and be certain about the related fix. Please do not skip a step.

Symptoms:

- Device path is disabled

- Can't fail over device path

- Can't see both device paths

- STMS is disabled

Environmental Considerations:

- This document assumes the customer is trying or is using STMS/MPXIO.

Steps to Follow
Verifying STMS (mpxio) Health
NOTE: This document is a sub-set of  <Document: 1009557.1>  : "Troubleshooting Fibre Channel Devices from the OS."  The steps below will help confirm that STMS is being used and both paths are seen.

1.  Validate that STMS is enabled:

Check that the mpxio-disable parameter is set to "no".

*Solaris[TM] 7,8,9

check /kernel/drv/scsi_vhci.conf

*Solaris[TM] 10 only

 /kernel/drv/fp.conf

Example:

   mpxio-disable="no";

If mpxio-disable is set to "yes" in the scsi_vhci.conf or fp.conf file, STMS is disabled for the entire system, no matter what.  Change the value to "no" to enable mpxio for the entire system and reconfigure reboot the host if STMS is the desired failover software.

2.   Validate that the Logical paths exist:

Use the "luxadm probe" command to verify that the logical paths to the devices are available.

T3 Example:

# luxadm probe
No Network Array enclosures found in /dev/es
Found Fibre Channel device(s):
Node WWN:50020f200000c21e  Device Type:Disk device
Logical Path:/dev/rdsk/c3t60020F200000C21E43E8E3BA00029D48d0s2
Node WWN:50020f20000035df  Device Type:Disk devive
Logical Path:
/dev/rdsk/c3t60020F200000C21E43E8E3DC0008B758d0s2


3510 Example:

# luxadm probe

No Network Array enclosures found in /dev/es

Found Fibre Channel device:

Node WWN:206000c0ff000f26  Device Type:Disk device

Logical Path:/dev/rdsk/c2t600C0FF000000000000F264CBFBA6F00d0s2

3. Validate paths using the "luxadm display <logical path>" command.

Check that the primary and secondary paths are configured.

T3 Example:

# luxadm display /dev/rdsk/c3t60020F200000C21E43E8E3BA00029D48d0s2
DEVICE PROPERTIES for
disk:dev/rdsk/c3t60020F200000C21E43E8E3BA00029D48d0s2
  Vendor:               SUN     
  Product ID:           T300            
  Revision:             0301
  Serial Num:           Unsupported
  Unformatted capacity: 51205.500 Mbytes
  Write Cache:          Enabled
  Read Cache:           Enabled
    Minimum prefetch:   0x0
    Maximum prefetch:   0x0
  Device Type:          Disk device
  Path(s):

 /dev/rdsk/c3t60020F200000C21E43E8E3BA00029D48d0s2
 /devices/scsi_vhci/ssd@g60020f200000c21e43e8e3ba00029d48:c,raw
Controller
/devices/pci@1f,0/pci@1/SUNW,qlc@3/fp@0,0
 Device Address              50020f23000035df,0
 Host controller port WWN    210000e08b09b58c
 Class                       secondary
 State                       STANDBY
Controller
/devices/pci@1f, 0/pci@1/SUNW,qlc@3,1/fp@0,0
 Device Address              50020f230000c21e,0
 Host controller port WWN    210100e08b29b58c
 Class                       primary
 State                       ONLINE

3510 Example:

# luxadm display /dev/rdsk/c2t600C0FF000000000000F264CBFBA6F00d0s2 DEVICE PROPERTIES for disk: /dev/rdsk/c2t600C0FF000000000000F264CBFBA6F00d0s2
  Vendor:               SUN
  Product ID:           StorEdge 3510
  Revision:             415F
  Serial Num:           000F264CBFBA
  Unformatted capacity: 241332.000 Mbytes
  Write Cache:          Enabled
  Read Cache:           Enabled
    Minimum prefetch:   0x0
    Maximum prefetch:   0xffff
  Device Type:          Disk device
  Path(s):

  /dev/rdsk/c2t600C0FF000000000000F264CBFBA6F00d0s2
  devices/scsi_vhci/ssd@g600c0ff000000000000f264cbfba6f00:c,raw
   Controller           /devices/pci@1f,4000/SUNW,qlc@4,1/fp@0,0
    Device Address              256000c0ffc00f26,0
   Host controller port WWN    210100e08b27eaa6
    Class                       primary

    State                       ONLINE

NOTE: If the steps above are true then STMS is being used and both paths are seen, return to step 4 in  the  <Document: 1009557.1>  "Troubleshooting Fibre Channel Devices  from the OS." If both paths are not seen from luxadm proceed to step 4.

4. Validate the out of band connection to the array:

Log into the array. If you are unable to connect, refer to  <Document: 1012660.1>   : "Can't Connect to Sun StorEdge [TM] Array"

5. Validate that the correct  array is being accessed.

For T3 ,  compare the output of "port list" with the WWN recorded ( luxadm -e dumpmap <device> ) in step 2 of   <Document: 1009556.1>  How to verify HBA Connectivity.

Example:

storage-t3b:/:<1>port list
port   targetid   addr_type   status   host   wwn
u1p1      1        hard       online   sun    
50020f230000c21e

u2p1      2        hard       online   sun    
50020f23000035df

For 351x ,  compare the output of "show port" with the WWN recorded ( luxadm -e dumpmap <device> ) in step 2 of  <Document: 1009556.1>  :  How to verify HBA Connectivity.

Example:

# luxadm -e dump_map
dev/rdsk/c2t600C0FF000000000000F264CBFBA6F00d0s2
Pos AL_PA ID Hard_Addr Port WWN         Node WWN         Type
0     1   7d    0      210100e08b27eaa6 200100e08b27eaa6 0x1f (UnknownType,Host Bus Adapter)
1     9f  2c    9f     256000c0ffc00f26 206000c0ff000f26 0x0  (Disk device)
sccli> show port
Ch  Id   WWPN
-------------------------
Sun StorageTek Traffic Manager 4.5 Software (Localized)

Internal Comments
For internal Sun use only.

This document contains normalized content and is managed by the the Domain Lead
(s) of the respective domains. To notify content owners of a knowledge gap
contained in this document, and/or prior to updating this document, please
contact the domain engineers that are managing this document via the “Document
Feedback” alias(es) listed below:

[email protected]

The Knowledge Work Queue for this article is KNO-STO-MIDRANGE_DISK
MPXIO, STMS, path offline, scsi_vhci, failover, T3, T3+, 3510, 3511, 351x, audited
Previously Published As
86544

Change History
Date: 2007-11-13
User Name: 7058
Action: Approved
Comment: External section of doc had reference to an internal link (sunsolve2.central).
Fixed.
Version: 9
Date: 2007-11-13
User Name: 7058
Action: Update Started
Comment: Fix links
Version: 0


Attachments

This solution has no attachment