管理多路径设备

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使用 mpathadm 命令确定和配置 Solaris OS 多路径支持。mpathadm 命令通过 ANSI 标准多路径管理 API 启用多路径管理。本章中用来表示路径、启动器端口、目标端口和 LU 的术语与 T10 规范一致。

执行以下任务来管理多路径设备。

显示多路径支持信息

可以使用 mpathadm 命令显示多路径支持信息并管理多路径搜索。多路径支持和属性信息用多路径管理 API 插件库名称进行标识，可使用 mpathadm 命令显示该插件库名称。

如何显示多路径支持信息

成为管理员。

确定系统上的多路径支持。

# mpathadm list mpath-support
mpath-support: libmpscsi_vhci.so

显示指定 mpath 支持名称的多路径支持属性。

# 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:  yes
        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:
                Vendor:  SUN     
                Product:  T300            
                Revision:  
                Supported Load Balance Types:
                        round-robin

                Vendor:  SUN     
                Product:  T4              
                Revision:  
                Supported Load Balance Types:
                        round-robin
.
.
.

命令输出还会显示多路径支持软件支持的设备产品的列表。缺省情况下，多路径支持 libmpscsi_vhci.so 库文件支持符合 T10 目标端口组的设备。

如何显示特定启动器端口的属性

以下步骤描述如何显示启动器端口的属性。

列出启动器端口。

# mpathadm list initiator-port
Initiator Port:  iqn.1986-03.com.sun:01:ffffffffffff.4e94f9bd,4000002a00ff
Initiator Port:  210100e08ba41feb
Initiator Port:  210000e08b841feb

显示特定启动器端口的属性。

# mpathadm show initiator-port 2000000173018713
Initiator Port:  210100e08ba41feb
        Transport Type:  Fibre Channel
        OS Device File:  /devices/pci@1,0/pci1022,7450@1/pci1077,141@2,1/fp@0,0

如何显示特定 LU 信息

使用 mpathadm 命令显示 LU 列表以及每个 LU 的属性。显示的 LU 列表中又包含可用于显示特定 LU 的属性的名称。

显示多路径 LU 的列表。

# 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
        /dev/rdsk/c0t600A0B800029065C00007CF44E233FCFd0s2
                Total Path Count: 4
                Operational Path Count: 4
        /dev/rdsk/c0t600A0B800026D63A0000A4974E23424Ed0s2
                Total Path Count: 4
                Operational Path Count: 4
.
.
.

显示使用列表中 LU 名称的特定 LU 的配置信息。

# mpathadm show lu /dev/rdsk/c4t60003BA27D2120004204AC2B000DAB00d0s2
        mpath-support:  libmpscsi_vhci.so
        Vendor:  SUN     
        Product:  Sun Storage NAS
        Revision:  1.0 
        Name Type:  unknown type
        Name:  600144f08069703400004e828ee10004
        Asymmetric:  yes
        Current Load Balance:  round-robin
        Logical Unit Group ID:  NA
        Auto Failback:  on
        Auto Probing:  NA

        Paths:  
                Initiator Port Name:  210100e08ba41feb
                Target Port Name:  2100001b329b6c3f
                Override Path:  NA
                Path State:  OK
                Disabled:  no

                Initiator Port Name:  210100e08ba41feb
                Target Port Name:  2101001b32bb6c3f
                Override Path:  NA
                Path State:  OK
                Disabled:  no

                Initiator Port Name:  210100e08ba41feb
                Target Port Name:  2100001b329b793c
                Override Path:  NA
                Path State:  OK
                Disabled:  no
.
.
.

        Target Port Groups:  
                ID:  0
                Explicit Failover:  no
                Access State:  active optimized
                Target Ports:
                        Name:  2100001b329b6c3f
                        Relative ID:  1

                        Name:  2101001b32bb6c3f
                        Relative ID:  2

                ID:  1
                Explicit Failover:  no
                Access State:  standby
                Target Ports:
                        Name:  2100001b329b793c
                        Relative ID:  257

                        Name:  2101001b32bb793c
                        Relative ID:  256

如何显示与特定目标端口相关联的所有 LU

使用以下步骤显示通过目标端口的路径。

显示 LU 列表。

# 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
.
.
.

显示特定 LU 的信息，以确定目标端口。

# mpathadm show lu /dev/rdsk/c0t600A0B800029065C00007CF54E234013d0s2
Logical Unit:  /dev/rdsk/c0t600A0B800029065C00007CF54E234013d0s2
        mpath-support:  libmpscsi_vhci.so
        Vendor:  SUN     
        Product:  CSM200_R        
        Revision:  0660
        Name Type:  unknown type
        Name:  600a0b800029065c00007cf54e234013
        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
.
.
.

        Target Port Groups:  
                ID:  4
                Explicit Failover:  yes
                Access State:  standby
                Target Ports:
                        Name:  200800a0b826d63b
                        Relative ID:  0

                        Name:  200800a0b826d63c
                        Relative ID:  0

                ID:  14
                Explicit Failover:  yes
                Access State:  active
                Target Ports:
                        Name:  200900a0b826d63b
                        Relative ID:  0

                        Name:  200900a0b826d63c
                        Relative ID:  0

显示特定的目标端口信息。

# mpathadm list lu -t 20030003ba27d212
mpath-support:  libmpscsi_vhci.so
        /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2
                Total Path Count: 4
                Operational Path Count: 4
mpath-support:  libmpscsi_vhci.so
        /dev/rdsk/c0t600A0B800029065C00007CF54E234013d0s2
                Total Path Count: 4
                Operational Path Count: 4
mpath-support:  libmpscsi_vhci.so
        /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2
                Total Path Count: 4
                Operational Path Count: 4
mpath-support:  libmpscsi_vhci.so
        /dev/rdsk/c0t600A0B800029065C00007CF44E233FCFd0s2
                Total Path Count: 4
                Operational Path Count: 4
.
.
.

如何显示特定名称的 LU

显示有关多路径 LU 的详细信息，包括路径和目标端口组信息。请注意，信息中的名称属性表示该 LU 的标识符，它是从硬件派生出来的，并由该系统使用。如果此名称源自 SCSI Inquiry 重要产品数据 (Vital Product Data, VPD) 页面 83h，则名称类型属性表示 SCSI 标准定义的一个关联标识符类型。

显示多路径 LU 的列表。

# 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
        /dev/rdsk/c0t600A0B800029065C00007CF44E233FCFd0s2
                Total Path Count: 4
                Operational Path Count: 4
.
.
.

显示选定 LU 的配置信息。

# mpathadm show lu /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2
Logical Unit:  /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2
        mpath-support:  libmpscsi_vhci.so
        Vendor:  SUN     
        Product:  CSM200_R        
        Revision:  0660
        Name Type:  unknown type
        Name:  600a0b800026d63a0000a4994e2342d4
        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:  3
                Explicit Failover:  yes
                Access State:  active
                Target Ports:
                        Name:  200800a0b826d63b
                        Relative ID:  0

                        Name:  200800a0b826d63c
                        Relative ID:  0

                ID:  13
                Explicit Failover:  yes
                Access State:  standby
                Target Ports:
                        Name:  200900a0b826d63b
                        Relative ID:  0

                        Name:  200900a0b826d63c
                        Relative ID:  0

显示选定 LU 的信息。

# mpathadm list lu -n 600a0b800026d63a0000a4994e2342d4
mpath-support:  libmpscsi_vhci.so
        /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2
                Total Path Count: 4
                Operational Path Count: 4

为多路径支持配置自动故障恢复

对称设备可以自动故障恢复到可能的最优路径。如果在初始路径上发生了故障转移，则备用路径将成为新的联机路径。通常，备用路径不是最理想的路径。当启用自动故障恢复时，初始路径会重新联机，并自动故障转移到初始路径。

如何为特定多路径支持配置自动故障恢复

成为管理员。

显示受支持的多路径驱动程序信息。

# mpathadm list mpath-support
mpath-support: libmpscsi_vhci.so

为受支持的多路径驱动程序启用自动故障恢复支持。
```
# mpathadm modify mpath-support -a on libmpscsi_vhci.so
 
```

确认配置更改。

# 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:
                Vendor:  SUN     
                Product:  T300            
                Revision:  
                Supported Load Balance Types:
                        round-robin

                Vendor:  SUN     
                Product:  T4              
                Revision:  
                Supported Load Balance Types:
                        round-robin
.
.
.

注 - 当系统正在运行时，mpathadm modify 命令设置所启动的自动显示有效。但是，要保持更改的设置持久，必须更新 /etc/driver/drv/scsi_vhci.conf 文件。请参阅配置自动故障恢复。

如何对 LU 进行故障转移

此操作仅适用于以下两个类别的设备：

具有由多路径支持可识别和支持的专用故障转移机制的非对称设备
符合 T10 标准目标端口组支持 libmpscsi_vhci.so 并提供了显式模式非对称 LU 访问的设备

显示多路径 LU 的列表。

# 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
.
.
.

显示特定 LU 的配置信息。

# 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

手动强制执行 LU 故障转移。
```
# mpathadm failover lu /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2
```
如果此操作成功，则由于逻辑单元故障转移，设备的目标端口组的访问状态将改变。

确认访问状态更改。

# 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

如何启用 LU 路径

如果指向 LU 的路径被禁用，则 enable 命令可将路径重新更改为启用。必须使用启动器端口名称、目标端口名称和 LU 指定完整路径。要验证更改，请对逻辑单元运行 show 命令。

显示多路径 LU 的列表。

# 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
        /dev/rdsk/c0t600A0B800029065C00007CF44E233FCFd0s2
                Total Path Count: 4
                Operational Path Count: 4
.
.
.

显示选定 LU 的配置信息。

# mpathadm show lu 
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

启用 LU 路径。

# mpathadm enable path -i 210000e08b841feb -t 200900a0b826d63b \ 
           -l /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2

如何禁用 LU 路径

此操作可使路径对 LU 不可用，而不管其操作状态是什么。

注 - 禁用状态不会在重新引导之间持续存在。如果在下一个引导序列之前路径是可操作的，则缺省情况下将启用该路径。当给定路径是剩余的最后一个可操作路径时，不允许执行此操作。

显示多路径 LU 的列表。

# 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
        /dev/rdsk/c0t600A0B800029065C00007CF44E233FCFd0s2
                Total Path Count: 4
                Operational Path Count: 4
.
.
.

显示特定 LU 的配置信息。

# mpathadm show lu /dev/rdsk/c0t600A0B800029065C00007CF34E233F89d0s2
Logical Unit:  /dev/rdsk/c0t600A0B800029065C00007CF34E233F89d0s2
        mpath-support:  libmpscsi_vhci.so
        Vendor:  SUN     
        Product:  CSM200_R        
        Revision:  0660
        Name Type:  unknown type
        Name:  600a0b800029065c00007cf34e233f89
        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:  8
                Explicit Failover:  yes
                Access State:  standby
                Target Ports:
                        Name:  200800a0b826d63b
                        Relative ID:  0

                        Name:  200800a0b826d63c
                        Relative ID:  0

                ID:  18
                Explicit Failover:  yes
                Access State:  active
                Target Ports:
                        Name:  200900a0b826d63b
                        Relative ID:  0

                        Name:  200900a0b826d63c
                        Relative ID:  0

选择启动器端口和目标端口名称。

禁用选定的 LU 路径。

# mpathadm disable path -i 210000e08b841feb -t 200900a0b826d63b \
           -l /dev/rdsk/c0t600A0B800029065C00007CF34E233F89d0s2

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	Oracle Solaris 11.1 管理：SAN 配置和多路径 Oracle Solaris 11.1 Information Library (简体中文)