在 Oracle® Solaris 11.2 中管理 SAN 设备和多路径

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更新时间： 2014 年 12 月
 
 

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

  1. 成为管理员。
  2. 显示受支持的多路径驱动程序信息。
    # mpathadm list mpath-support
mpath-support: libmpscsi_vhci.so
  3. 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
  4. 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

  1. 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
.
.
.
  2. 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
  3. 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。

  4. 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。

  1. 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
.
.
.
  2. 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
  3. 启用 LU 路径。
    # mpathadm enable path -i 210000e08b841feb -t 200900a0b826d63b \ 
           -l /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2

如何禁用 LU 路径

此操作禁用 LU 路径，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。
  1. 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
.
.
.
  2. 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
  3. 选择启动器端口和目标端口名称。
  4. 禁用选定的 LU 路径。
    # mpathadm disable path -i 210000e08b841feb -t 200900a0b826d63b \
           -l /dev/rdsk/c0t600A0B800029065C00007CF34E233F89d0s2
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