诊断工具fcmsutil, tdutil, tdlist, tddiag

 

fcmsutil

fcmsutil工具在/opt/fc/bin/ 或是/opt/fcms/bin.可以用来诊断FC环路的问题。需要以光纤卡的设备文件启动。 (通过ioscan –fnk查看).

 

Tachyon Example:

# fcmsutil /dev/fcms2

Local N_Port_ID is = 0x000001

N_Port Node World Wide Name = 0x10000060B03EF669

N_Port Port World Wide Name = 0x10000060B03EF669

Topology = IN_LOOP

Speed = 1062500000 (bps)

HPA of card = 0xFFB4C000

EIM of card = 0xFFFA2009

Driver state = READY

Number of EDB's in use = 0

Number of OIB's in use = 0

Number of Active Outbound Exchanges = 1

Number of Active Login Sessions = 3

 

 

Tachyon TL/TS/XL2 Example:

 

# fcmsutil /dev/td0

Vendor ID is = 0x00103c

Device ID is = 0x001029

XL2 Chip Revision No is = 2.2

PCI Sub-system Vendor ID is = 0x00103c

PCI Sub-system ID is = 0x00128c

Topology = PTTOPT_FABRIC

Link Speed = 1Gb

Local N_Port_id is = 0x0d1200

N_Port Node World Wide Name = 0x50060b000010dcef

N_Port Port World Wide Name = 0x50060b000010dcee

Driver state = ONLINE

Hardware Path is = 0/4/1/0

Number of Assisted IOs = 471

Number of Active Login Sessions = 0

Dino Present on Card = NO

Maximum Frame Size = 1024

Driver Version = @(#) libtd.a HP Fibre Channel

Tachyon XL2 Driver B.11.23.0512 $Date: 2005/09/20 12:22:47 $Revision:

r11.23/1

 

 

其他可能的拓扑是: PRIVATE_LOOP

 

把光纤拔出来以后，状态就会变成：

Driver state = AWAITING_LINK_UP

 

 

可以获取连接的统计信息:

 

# fcmsutil /dev/td0 stat -s

Fri Apr 26 16:05:55 2002

Channel Statistics

 

Statistics From Link Status Registers ...

Loss of signal     2Bad Rx Char 182

Loss of Sync          40Link Fail 4

Received EOFa      0Discarded Frame 0

Bad CRC            0Protocol Error 0

 

 

不要只看数值高不高，因为有些计数器随着启动或LIP就会递增。只有随着时间增长而增长的数字才意味着问题。下面可以看到一个典型的出错信息：

 

0/4/0/0: Unable to access previously accessed device at nport ID 0xae.

 

如何诊断：

 

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看到蓝色部分8.0.255没有，说明这是一个private loop. 这里N_port ID就等于AL_PA。  AP_PA= 0xae，换算过来loop ID=34. 这个设备不见了。

 

# fcmsutil /dev/td0 devstat all | grep -e Nport -e Failed

Device Statistics for Nport_id 0x0000ae(Loop_id 34)

Failed Open of previously opened device               9

Device Statistics for Nport_id 0x0000b9(Loop_id 27)

Failed Open of previously opened device               0

Device Statistics for Nport_id 0x0000ba(Loop_id 26)

Failed Open of previously opened device               0

Device Statistics for Nport_id 0x0000bc(Loop_id 25)

Failed Open of previously opened device               0

Device Statistics for Nport_id 0x0000c3(Loop_id 24)

Failed Open of previously opened device               0

Device Statistics for Nport_id 0x0000c6(Loop_id 22)

Failed Open of previously opened device               0

Device Statistics for Nport_id 0x0000ce(Loop_id 15)

Failed Open of previously opened device               0

Device Statistics for Nport_id 0x0000d1(Loop_id 14)

Failed Open of previously opened device               0

Device Statistics for Nport_id 0x0000d2(Loop_id 13)

Failed Open of previously opened device               0

Device Statistics for Nport_id 0x0000d3(Loop_id 12)

Failed Open of previously opened device               0

 

 

这是一个private loop，采用PDA 编址模式(8.0.255),  

LoopID = 16*Bus+Target

==> Bus = 34 DIV 16 = 2

==> Target = 34 MOD 16 = 2

所以对应的 HW path:

 

HBA Domain Area Port Bus Target Lun

 

0/4/0/0. 8 . 0 . 255 . 2 . 2 . 0

 

这个路径在ioscan的输出中没出现，因为IO显示为NO_HW,可能有人把这个设备断开了，在这之前主机没有重起过。

 

ext_bus 6 0/4/0/0.8.0.255.2 fcpdev NO_HW INTERFACE FCP Device Interface

 

A5236A 是FC10 JBOD盘柜.

 

Overview of fcmsutil options

 

T: Tachyon芯片适用, TL: Tachyon TL/TS/XL2适用, 红色字体的:

有干扰的操作，通讯可能中断。

 

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tdutil, tdlist, tddiag

在/opt/fcms/bin中还有其他的工具:

 

tdutil  

这就是td驱动专用的fcmsutil.

 

tdlist

是一个shell脚本，通过ioscan和tdutil命令列出所有通过td驱动程序来驱动的设备。这个程序有个不错的功能是把Loop ID转换成AL_PA。

 

tddiag

是一个shell脚本，收集下列信息：主机名、主机型号，内存信息，mount的文件系统，TachLite版本信息，ioscan输出，tdlist输出，补丁，TachLite对应的设备文件名，正在运行的进程，每个/dev/td#对应的信息等

 

如何更换硬盘- Tachyon TL/TS/XL2 HBAs

服务器访问目标前要先通过认证其WWN，认证过程(PLOGI)确保主机访问的是正确的设备，避免用户无意间在同一nport_id上连接了其他设备造成数据损坏。

 

HBA保留一张表记录了每一个访问过的设备的地址 (S_ID or AL_PA and WWN)。这张表是在链路初始化过程或是每一次通讯时建立的。

 

NOTE: 这个认证过程只在TL/TS/XL2 adapter上支持,Tachyon adapters不进行这样的认证。 (replace_dsk 选项只在TL/TS/XL2上支持).

 

Fcmsutil的replace_dsk选项用来替换同一nport_id上的设备。更换硬盘时应该执行这个命令，这样就禁止了下次访问里对设备的认证，从而避免出现下列的出错信息 (syslog):

 

0/4/0/0: 'World-wide name' (unique identifier) for device at Loop ID

0x5 has changed. If the device has been replaced intentionally, please

use the fcmsutil replace_dsk command to allow the new device to be

used.

 

本例中连接在Tachyon TL/TS/XL2-Adapter /dev/td0 上loop_id=5的硬盘将要被更换

 

. 确认待更换硬盘的nport_id或是loop_id (如果syslog或其他日志里已经报出来了，就不用了)

.把旧设备移走

.列出所有正常访问过的设备，通过devstat all选项

# fcmsutil /dev/td0 devstat all | grep Loop

Device Statistics for Nport_id 0x0000E8 (Loop_id 1)

Device Statistics for Nport_id 0x0000DA (Loop_id 5)

  用echo选项，尝试与每一个loop_id对应的设备通讯，联系不上的设备会报“unable to login”

# fcmsutil /dev/td0 echo -l 1

Data came back intact

...

# fcmsutil /dev/td0 echo -l 5

Unable to login

 

 

· 运行replace_dsk ，用nport_id:

# fcmsutil /dev/td0 replace_dsk 0x0000DA

在private loop拓扑中也可以用 loop_id:

 

# fcmsutil /dev/td0 replace_dsk -l 5

 

命令运行后，会有提示信息：

Disk at nportid 0x0000da (Loop_id 5) will not be authenticated

 

 

ATTENTION:这个步骤要在所有访问该设备的Tachyon TL/TS/XL2 adapter 上执行！

 

· 换盘吧

 

新的硬盘(loop_id=5)就不会出现认证错误了。下一次主机访问设备时，会将其WWN更新，与nport_id对应。

 

输入正确的nport_id 或是loop_id很重要。但你要是万一输错了，也没啥坏结果。

Fibre Channel Storage Devices

简单看下现有的FC存储设备。细节可以去看

http://www.hp.com/go/storage

 

略过，写的都是老掉牙的设备，只有EVA与XP还在用。