Resolving errors with Fibre Channel communications
Refer to a list of actions to identify and resolve communication errors with Fibre Channel devices. About this task
The following steps help you to identify the source of the problem and resolve the error. Perform these steps if the host is unable to communicate with one of more Fibre Channel devices in the library. Procedure
1. Ensure that all Fibre Channel cables from the host to the library are securely connected at
both ends. 2. If multiple Fibre Channel drives exist on a single loop (as when multiple drives are
connected to a hub), ensure that each device on the loop has a unique loop ID. 3. Ensure that all Fibre Channel host adapters are supported (for a list of supported adapters,
refer tohttp://www.ibm.com/servers/storage/tape/drives. Under the appropriate tape drive, select Product details. Then, select Host bus adapter. Or, contact your IBM? sales representative). 4. Ensure that the appropriate levels of device driver are installed and that any other
prerequisites are satisfied. 5. If you are connecting through a storage area network (SAN) Data Gateway, ensure that
the gateway has the appropriate level of firmware (see note at the end of table). 6. If you have 4 Gb Fibre Channel backend switches (FC 4872 or 4873) or 8 Gb Fibre
Channel backend switches (FC 4875 or 4877)installed on an L23 or D23 frame, contact your service representative. The TS7700 or 3592-C07 detects any problem with the Fibre Channel switches and generates a Call Home. 7. If the maximum number of cartridges is more than 6 887 for the logical library, or if the
logical library has shuttle stations that are assigned, ensure that the logical library uses LTO Ultrium 4, 3592 E05, or later tape drives as control path drives. To support more than 6 887 cartridges, Ultrium 4 control path drives require a minimum code level of 97F0. For logical libraries with shuttle stations, Ultrium 4 control path drives require a minimum code level of A480. Ultrium 5 control path drives require a minimum code level of B170. Perform the following steps to ensure that you have the correct drives and code levels:
a. Display the control paths using the Drive Assignment page on the Tape Library
Specialist web interface . If an older generation tape drive is used as a control path, proceed with the next step. b. Follow the instructions in Enabling or disabling a control path in a logical library to disable the older generation tape drive and enable the appropriate drive as the control path. c. Reconfigure the host to pick up the device again. Refer to your device driver
documentation for additional instructions.
8. Some Fibre Channel devices (such as the SAN Data Gateway, or routers and
switches) provide diagnostic routines that show all of the devices that are attached to them. Refer to the device documentation for details about the routines. If a Fibre Channel device that is positioned between the host and the library can see the library's devices, the problem is probably between the Fibre Channel device and the host. 9. Ensure that the host is configured with the correct World Wide Node Name or worldwide
port name. 10. Refer to the problem determination information in the documentation for the device
driver that you are using. If you are using the IBM Ultrium Device Drivers, refer to IBM Tape Device Drivers Installation and User's Guide. Ensure that the device driver is loaded and that it can communicate with the tape drives:
a. If the device driver is not loaded, install it.
b. If the device driver is loaded but cannot communicate with the tape drives, call
your IBM service representative. c. If the device driver is loaded and can communicate with the tape drives, but the
application software cannot communicate with the tape drives, contact the provider of your application software for assistance.
11. Current Fibre Channel components support various Fibre Channel speeds. Possible
speeds are 1 Gb/s, 2 Gb/s, 4 Gb/s, 8 Gb/s. Refer to the machine configuration and ensure that all drives, switches, and host bus adapters use compatible speed settings. 12. For a 3592 tape drive, open the rear door of the library, locate the affected drive, and observe the status LEDs on the back of the drive canister. The LEDs have the following meaning:
o Blank: no light is detected at the drive's Fibre Channel port. This indicates one of the following conditions:
? A Fibre Channel cable is unplugged at the drive or at the nearest Fibre
Channel device (host bus adapter, switch, or hub).
? A Fibre Channel cable is broken between the drive and the nearest Fibre
Channel device (host bus adapter, switch, or hub).
? The drive or the nearest Fibre Channel device (host bus adapter, switch,
or hub) is powered off or has a hardware problem.
o Blinking Yellow: Fibre Channel connections between the drive and the Fibre
Channel device to which it is connected (host bus adapter, switch, or hub) are good, but communication has not been established.
o Blinking Green: Fibre Channel connections are good and data is being transferred.
o Green (not blinking): Fibre Channel connections are good, but no data is being
transferred. Note that the Fibre Channel wrap plug may be installed or that the drive may be offline (in maintenance mode).
13. For an LTO tape drive, open the rear door of the library, locate the affected drive, and
observe the status LEDs on the back of the drive canister. The LEDs have the following meaning:
o Blank: no light is detected at the drive's Fibre Channel port. This indicates one of the following conditions:
? A Fibre Channel cable is unplugged at the drive or at the nearest Fibre
Channel device (host bus adapter, switch, or hub).
? A Fibre Channel cable is broken between the drive and the nearest Fibre
Channel device (host bus adapter, switch, or hub).
? The drive or the nearest Fibre Channel device (host bus adapter, switch,
or hub) is powered off or has a hardware problem.
o Yellow: Fibre Channel connections between the drive and the Fibre Channel
device to which it is connected (host bus adapter, switch, or hub) are good, but communication has not been established.
o Green: Fibre Channel connections are good and communication has been
established.
光纤通道通信的解决错误
参考一系列动作来识别和解决光纤通道设备的通信错误。
关于这个任务
以下的步骤可以帮助您确定问题的来源并解决错误。如果主机无法与在库中的多个光纤通道设备进行通信，执行这些步骤。 程序
确保从主机到库的所有光纤通道电缆安全地连接在两端。
如果多个光纤通道驱动器存在于一个单一的循环（如多个驱动器连接到一个集线器），确保每个设备上的循环有一个独特的循环。
确保所有的光纤通道主机适配器的支持（对于名单支持适配器，指http://www.ibm.com/servers/storage/tape/drives。在适当的磁带驱动器，选择产品的细节。然后，选择主机总线适配器。或者，你?联系IBM销售代表）。
确保安装了适当的设备驱动程序，并满足任何其他先决条件。
如果您正在通过存储区域网络（三）数据网关连接，确保网关具有适当的固件级别（见表的结尾见注释）。
如果你有4 GB光纤通道后端开关（FC 4872或4873）或安装8 GB光纤通道后端开关（FC 4875
或4877）L23或D23框架，联系你的服务代表。的ts7700或3592-c07检测与光纤通道交换机的任何问题，并产生一个称之为家的。
如果墨盒的最大数量超过6 887逻辑库，或如果逻辑库具有梭站分配，确保逻辑库使用LTO Ultrium 4，3592 E05，或后来磁带驱动器控制驱动器路径。支持超过6 887墨盒，傲群4控制路径的驱动器需要一个最小的97f0代码级。有梭站逻辑库，傲群4控制路径的驱动器需要一个最小的数码相机代码级。傲群5控制路径的驱动器需要一个最小的B170代码级。执行以下步骤以确保您有正确的驱动器和代码级别：
在磁带库专家网络接口上使用驱动器分配页显示控制路径。如果一个老一代磁带驱动器作为控制路径，继续进行下一步。
按照指示，在一个逻辑库中启用或禁用一个控制路径，以禁用较旧的一代磁带驱动器，并启用适当的驱动器作为控制路径。
配置主机再次拿起装置。请参阅您的设备驱动程序文档，以供其他说明。
一些光纤通道设备（如数据网关，路由器和交换机）提供诊断例程，显示所有的设备都连接到它们。有关例程的详细信息的设备文档。如果主机和库之间的光纤通道设备可以看到库的设备，这个问题很可能是光纤通道设备和主机之间的问题。
确保主机配置正确的世界范围内的节点名称或全球端口名称。
指的是你正在使用的设备驱动程序的文档中的问题确定信息。如果你使用的是IBM Ultrium设备驱动程序，是指IBM磁带设备驱动程序的安装和用户指南。确保设备驱动程序被加载，并且它可以与磁带驱动器进行通信：
如果设备驱动程序没有加载，安装它。
如果设备驱动加载但不能与磁带驱动器的交流，打电话给IBM服务代表。
如果设备驱动程序被加载，并且可以与磁带驱动器进行通信，但是应用软件不能与磁带驱动器进行通信，请联系您的应用软件的供应商。
目前的光纤通道组件支持各种光纤通道的速度。可能的速度为1个/秒，2个/秒，4个/秒，8个标准/ s。
3584带库光纤通道通信的解决错误
