論理ユニットをフェイルオーバーする方法

言語:

この操作は、次の 2 つのカテゴリのデバイスにのみ適用されます。

マルチパス化サポートによって認識およびサポートされる、専有のフェイルオーバーメカニズムを持つ非対称型デバイス
T10 標準ターゲットポートグループサポート libmpscsi_vhci.so に準拠し、明示的な非対称型論理ユニット (LU) アクセスのモードを提供するデバイス

フェイルオーバーのサポートを判別します。

# mpathadm show mpath-support libmpscsi_vhci.so
mpath-support:  libmpscsi_vhci.so
        Vendor:  Sun Microsystems
        Driver Name:  scsi_vhci
        Default Load Balance:  round-robin
        Supported Load Balance Types:  
                round-robin
                logical-block
        Allows To Activate Target Port Group Access:  yes
        Allows Path Override:  no
        Supported Auto Failback Config:  1
        Auto Failback:  on
        Failback Polling Rate (current/max):  0/0
        Supported Auto Probing Config:  0
        Auto Probing:  NA
        Probing Polling Rate (current/max):  NA/NA
        Supported Devices:
.
.
.

マルチパス化された LU のリストを表示します。

# mpathadm list lu
        /dev/rdsk/c0t600144F08069703400004E828EE10004d0s2
                Total Path Count: 8
                Operational Path Count: 8
        /dev/rdsk/c0t600144F08069703400004E8183DF0002d0s2
                Total Path Count: 8
                Operational Path Count: 8
        /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2
                Total Path Count: 4
                Operational Path Count: 4
        /dev/rdsk/c0t600A0B800029065C00007CF54E234013d0s2
                Total Path Count: 4
                Operational Path Count: 4
        /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2
                Total Path Count: 4
                Operational Path Count: 4
.
.
.

特定の LU の構成情報を表示します。

# mpathadm show lu /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2
Logical Unit:  /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2
        mpath-support:  libmpscsi_vhci.so
        Vendor:  SUN     
        Product:  CSM200_R        
        Revision:  0660
        Name Type:  unknown type
        Name:  600a0b800026d63a0000a4984e234298
        Asymmetric:  yes
        Current Load Balance:  round-robin
        Logical Unit Group ID:  NA
        Auto Failback:  on
        Auto Probing:  NA

        Paths:  
                Initiator Port Name:  210000e08b841feb
                Target Port Name:  200800a0b826d63b
                Override Path:  NA
                Path State:  OK
                Disabled:  no

                Initiator Port Name:  210000e08b841feb
                Target Port Name:  200900a0b826d63b
                Override Path:  NA
                Path State:  OK
                Disabled:  no

                Initiator Port Name:  210000e08b841feb
                Target Port Name:  200800a0b826d63c
                Override Path:  NA
                Path State:  OK
                Disabled:  no

                Initiator Port Name:  210000e08b841feb
                Target Port Name:  200900a0b826d63c
                Override Path:  NA
                Path State:  OK
                Disabled:  no

        Target Port Groups:  
                ID:  5
                Explicit Failover:  yes
                Access State:  active
                Target Ports:
                        Name:  200800a0b826d63b
                        Relative ID:  0

                        Name:  200800a0b826d63c
                        Relative ID:  0

                ID:  15
                Explicit Failover:  yes
                Access State:  standby
                Target Ports:
                        Name:  200900a0b826d63b
                        Relative ID:  0

                        Name:  200900a0b826d63c
                        Relative ID:  0

LU フェイルオーバーを手動で強制実行します。
```
# mpathadm failover lu /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2
```
この操作に成功した場合、デバイスのターゲットポートグループのアクセス状態は、論理ユニットのフェイルオーバーの結果、変更されます。

アクセス状態の変更を確認します。

# mpathadm show lu /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2
Logical Unit:  /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2
        mpath-support:  libmpscsi_vhci.so
        Vendor:  SUN     
        Product:  CSM200_R        
        Revision:  0660
        Name Type:  unknown type
        Name:  600a0b800026d63a0000a4984e234298
        Asymmetric:  yes
        Current Load Balance:  round-robin
        Logical Unit Group ID:  NA
        Auto Failback:  on
        Auto Probing:  NA

        Paths:  
                Initiator Port Name:  210000e08b841feb
                Target Port Name:  200800a0b826d63b
                Override Path:  NA
                Path State:  OK
                Disabled:  no

                Initiator Port Name:  210000e08b841feb
                Target Port Name:  200900a0b826d63b
                Override Path:  NA
                Path State:  OK
                Disabled:  no

                Initiator Port Name:  210000e08b841feb
                Target Port Name:  200800a0b826d63c
                Override Path:  NA
                Path State:  OK
                Disabled:  no

                Initiator Port Name:  210000e08b841feb
                Target Port Name:  200900a0b826d63c
                Override Path:  NA
                Path State:  OK
                Disabled:  no

        Target Port Groups:  
                ID:  5
                Explicit Failover:  yes
                Access State:  standby
                Target Ports:
                        Name:  200800a0b826d63b
                        Relative ID:  0

                        Name:  200800a0b826d63c
                        Relative ID:  0

                ID:  15
                Explicit Failover:  yes
                Access State:  active
                Target Ports:
                        Name:  200900a0b826d63b
                        Relative ID:  0

                        Name:  200900a0b826d63c
                        Relative ID:  0