Verifying STMS (MPxIO) Health on StorageTek 2500, Sun Storage 2500-M2 and Sun Storage 6000 Series Arrays

Asset ID:	1-71-1333027.1
Update Date:	2012-01-05
Keywords:

Solution Type Technical Instruction Sure

Solution 1333027.1 : Verifying STMS (MPxIO) Health on StorageTek 2500, Sun Storage 2500-M2 and Sun Storage 6000 Series Arrays

Applies to:

Sun Storage 2530 Array - Version: Not Applicable and later   [Release: N/A and later ]
Sun Storage 2530-M2 Array - Version: Not Applicable and later    [Release: N/A and later]
Sun Storage 6140 Array - Version: Not Applicable and later    [Release: N/A and later]
Sun Storage 2540 Array - Version: Not Applicable and later    [Release: N/A and later]
Sun Storage 2540-M2 Array - Version: Not Applicable and later    [Release: N/A and later]
Information in this document applies to any platform.

Goal

Verify MPxIO health on a StorageTek 2500, Sun Storage 2500-M2 or Sun Storage 6000 arrays.

You can use either:

mpathadm (supported for FC/SAS/iSCSI)

luxadm (supported on FC only)

to verify MPxIO health. This document shows the usage of both.

Solution

Using mpathadm.

1. Verify mpxio is enabled.

Solaris[TM] 7, 8 and 9 use the /kernel/drv/scsi_vhci.conf file for the setting below.
Solaris[TM] 10 uses :

/kernel/drv/fp.conf file for the setting below for FC devices
/kernel/drv/mpt.conf or /kernel/drv/mpt_sas.conf for the setting below for SAS devices
/kernel/drv/iscsi.conf for the setting below for iSCSI devices

Check the "mpxio-disable" parameter.

If set to "no", STMS is enabled.
If set to "yes" STMS is disabled.

System reboot is required if you change the parameter.

You can also use the following command lines (CLI) on Solaris 10 :

To enable STMS globally:
# stmsboot -e

To disable STMS globally:
# stmsboot -d

See man stmsboot for more details and explicit examples.

2. Identify the array controller port world wide names (WWNs):

Log into Sun Storage Common Array Manager (CAM).
Click on your array name.
Click on physical devices.
Click on ports.

The output lists the controller A/B ports with their WWNs.
Note the WWN of any port in "UP" status.

3. For FC devices only, verify FC HBA connectivity from the host perspective.

Any "CONNECTED" path confirms a valid connection.
If ALL paths are "NOT CONNECTED", you will need to physically access the host, and inspect the FC connections.

# luxadm -e port
/devices/pci@1e,600000/pci@2/scsi@5/fp@0,0:devctl                  CONNECTED
/devices/pci@1e,600000/pci@3/SUNW,qlc@5/fp@0,0:devctl              NOT CONNECTED
/devices/pci@1c,600000/SUNW,qlc@1/fp@0,0:devctl                    CONNECTED
/devices/pci@1d,700000/SUNW,qlc@1/fp@0,0:devctl                    CONNECTED
/devices/pci@1e,600000/pci@2/scsi@4/fp@0,0:devctl                  CONNECTED
/devices/pci@1e,600000/pci@3/SUNW,qlc@4/fp@0,0:devctl              NOT CONNECTED

4. Look for scsi_vhci device paths in format. If mpxio is disabled, there will be no scsi_vhci device paths in format.

#format
Searching for disks...done
AVAILABLE DISK SELECTIONS:

1. c9t600A0B80004739FA00002A754DEE2078d0 <SUN-STK6580_6780-0760 cyl 5118 alt 2 hd 64 sec 64>
/scsi_vhci/ssd@g600a0b80004739fa00002a754dee2078
2. c9t60080E50001C0300000006464D8C9044d0 <SUN-LCSM100_F-0777 cyl 2558 alt 2 hd 64 sec 64>
/scsi_vhci/ssd@g60080e50001c0300000006464d8c904

5. Verify the paths to the ST2540/ST2540-M2 array:

# mpathadm list LU
        /dev/rdsk/c9t60080E50001C0300000006464D8C9044d0s2
                Total Path Count: 2
                Operational Path Count: 2

# mpathadm show LU /dev/rdsk/c9t60080E50001C0300000006464D8C9044d0s2

Logical Unit: /dev/rdsk/c9t60080E50001C0300000006464D8C9044d0s2
        mpath-support: libmpscsi_vhci.so
        Vendor: SUN
        Product: LCSM100_F --------------------------------> Product name of the 2540 or 2540-M2
        Revision: 0777
        Name Type: unknown type
        Name: 60080e50001c0300000006464d8c9044
        Asymmetric: yes
        Current Load Balance: round-robin
        Logical Unit Group ID: NA
        Auto Failback: on
        Auto Probing: NA

        Paths:
                Initiator Port Name: 210000e08b07922c -------> WWN of the HBA port
                Target Port Name: 203d0080e51c2cc4 ---------> WWN of the array controller port
                Override Path: NA
                Path State: OK
                Disabled: no

                Initiator Port Name: 210000e08b07f32c
                Target Port Name: 203e0080e51c2cc4
                Override Path: NA
                Path State: OK
                Disabled: no

        Target Port Groups:
                ID: 1
                Explicit Failover: yes
                Access State: active
                Target Ports:
                        Name: 203d0080e51c2cc4
                        Relative ID: 0

                ID: 4
                Explicit Failover: yes
                Access State: standby
                Target Ports:
                        Name: 203e0080e51c2cc4
                        Relative ID: 0

6. In format:

Match the global unique ID (GUID) from the above output
Verify the ProductID from the above output.

10. c9t60080E50001C0300000006464D8C9044d0 <SUN-LCSM100_F-0777 cyl 2558 alt 2 hd 64 sec 64>
/scsi_vhci/ssd@g60080e50001c0300000006464d8c9044

GUID for the above device = 60080E50001C0300000006464D8C9044.
ProductID = LCSM100_F --> which is a 2540 or 2540-M2 array.

Using luxadm.

1. Verify mpxio is enabled.

Solaris[TM] 7, 8 and 9 use the /kernel/drv/scsi_vhci.conf file for the setting below.
Solaris[TM] 10 uses the /kernel/drv/fp.conf file for the setting below for FC devices

Check the "mpxio-disable" parameter.

If set to "no", STMS is enabled.
If set to "yes" STMS is disabled.

System reboot is required if you change the parameter.

You can also use the following command lines (CLI) on Solaris 10 :

To enable STMS globally:

# stmsboot -e

To disable STMS globally:
# stmsboot -d

See man stmsboot for more details and explicit examples.

2. Identify the array controller port WWN:

Log into Sun Storage Common Array Manager (CAM).
Click on your array name.
Click on physical devices.
Click on ports.

The output lists the controller A/B ports with their WWNs.
Note the WWN of any port in "UP" status.

3. Look for scsi_vhci device paths in format validating mpxio is managing the volume/LUN. If mpxio is disabled, there will be no scsi_vhci device paths in format.

# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:

1. c9t600A0B80004739FA00002A754DEE2078d0 <SUN-STK6580_6780-0760 cyl 5118 alt 2 hd 64 sec 64>
/scsi_vhci/ssd@g600a0b80004739fa00002a754dee2078
2. c9t60080E50001C0300000006464D8C9044d0 <SUN-LCSM100_F-0777 cyl 2558 alt 2 hd 64 sec 64>
/scsi_vhci/ssd@g60080e50001c0300000006464d8c9044

4. Verify FC HBA connectivity from the host perspective.

Any "CONNECTED" path confirms a valid connection.
If ALL paths are "NOT CONNECTED", you will need to physically access the host, and inspect the FC connections.

# luxadm -e port
/devices/pci@1e,600000/pci@2/scsi@5/fp@0,0:devctl                  CONNECTED
/devices/pci@1e,600000/pci@3/SUNW,qlc@5/fp@0,0:devctl              NOT CONNECTED
/devices/pci@1c,600000/SUNW,qlc@1/fp@0,0:devctl                    CONNECTED --> the path we will focus on below
/devices/pci@1d,700000/SUNW,qlc@1/fp@0,0:devctl                    CONNECTED
/devices/pci@1e,600000/pci@2/scsi@4/fp@0,0:devctl                  CONNECTED
/devices/pci@1e,600000/pci@3/SUNW,qlc@4/fp@0,0:devctl              NOT CONNECTED

5. Verify HBA and controller WWNs of a CONNECTED path.

# luxadm -e dump_map /devices/pci@1c,600000/SUNW,qlc@1/fp@0,0:devctl
Pos Port_ID Hard_Addr Port WWN         Node WWN         Type
0    20400   0         207500a0b84739fa 200400a0b84739fa 0x0 (Disk device)
1    20500   0         203e0080e51c2cc4 200d0080e51c2cc4 0x0 (Disk device)
2    20800   0         20420080e51f5e38 20020080e51f5e38 0x0 (Disk device)
3    20b00   0         20240080e517bd7c 20040080e517bd7c 0x0 (Disk device)
4    20900   0         210000e08b07f32c 200000e08b07f32c 0x1f (Unknown Type,Host Bus Adapter)

Port WWN 203e0080e51c2cc4 = the WWN of the host port on the array controller (aka target).
Port WWN 210000e08b07f32c = the WWN of the HBA port on the host (aka initiator).

6. Verify the paths from the array controller perspective.

# luxadm display 203e0080e51c2cc4
DEVICE PROPERTIES for disk: 203e0080e51c2cc4
Vendor:               SUN
Product ID:           LCSM100_F ------------> this is a 2540 or 2540-M2 array
Revision:             0777
Serial Num:           SV04720931
Unformatted capacity: 5120.000 MBytes
Write Cache:          Enabled
Read Cache:           Enabled
    Minimum prefetch:   0x3
    Maximum prefetch:   0x0
Device Type:          Disk device
Path(s):

/dev/rdsk/c9t60080E50001C0300000006464D8C9044d0s2
/devices/scsi_vhci/ssd@g60080e50001c0300000006464d8c9044:c,raw
   Controller           /devices/pci@1d,700000/SUNW,qlc@1/fp@0,0
    Device Address              203d0080e51c2cc4,0
    Host controller port WWN    210000e08b07922c
    Class                       primary
    State                       ONLINE
   Controller           /devices/pci@1c,600000/SUNW,qlc@1/fp@0,0
    Device Address              203e0080e51c2cc4,0
    Host controller port WWN    210000e08b07f32c
    Class                       secondary
    State                       STANDBY

7. In format:

Match the global unique ID (GUID) from the above output.
Verify the ProductID from the above output.

7. c9t60080E50001C0300000006464D8C9044d0 <SUN-LCSM100_F-0777 cyl 2558 alt 2 hd 64 sec 64>
/scsi_vhci/ssd@g60080e50001c0300000006464d8c9044

LCSM100_F = 2540 and 2540-M2 product ID.
60080e50001c03000000646d8c9044 = GUID.

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