三月 11, 2009 作者：
sunchiahome ,thx
WWN 為World Wide Name 縮寫
如同網卡有 MAC Address(48bits) 作為辨識方式.光纖也是有類似的定址 WWN，World Wide Name:FC 光纖通道的定址 (64 bits),這個光纖通道的 WWN 也像是 MAC 一樣每一個出貨的 HBA(Host Bus Adapter) 都有他獨一無二的 WWN .屬於硬體的一部份,無法輕易更改.不過 WWN 還細分了 WWNN:World Wide Node Name / WWPN:World Wide Port Name 使用上有點不同.
1.當你的光纖 HBA 卡有多個 port 時存在(2個以上) 你想針對 HBA 上所有的 port 你應該使用 WWNN
2.如果是針對單一個 port 時需要使用 WWPN
3.通常會在 Fiber switch 上使用到 cone 時會看到針對 WWPN WWNN 來設定.
Linux 下要看 WWNN / WWPN 可以查看檔案 /proc/scsi/qla2xxx/ (thx 補:這應該是限定QLogic Card看法)
[root@benjr ~]# ls -l /proc/scsi/qla2xxx/
total 0
-rw-r--r-- 1 root root 0 Mar 11 19:04 4
-rw-r--r-- 1 root root 0 Mar 11 19:04 5 [root@benjr ~]# cat /proc/scsi/qla2xxx/4
QLogic PCI to Fibre Channel Host Adapter for xxxxxxxx:
Firmware version 4.04.00 [IP] [84XX] , Driver version 8.02.14.01-fo
BIOS version 0.00
FCODE version 0.00
EFI version 0.00
Flash FW version 0.00.00 0000
ISP: ISP6432
Request Queue = 0x179500000, Response Queue = 0x17a800000
Request Queue count = 4096, Response Queue count = 512
Total number of active commands = 0
Total number of interrupts = 4002
Device queue depth = 0x20
Number of free request entries = 3596
Number of mailbox timeouts = 0
Number of ISP aborts = 0
Number of loop resyncs = 0
Number of retries for empty slots = 0
Number of reqs in pending_q= 0, retry_q= 0, done_q= 0, scsi_retry_q= 0
Number of reqs in failover_q= 0
Host adapter:loop state = <READY>, flags = 0x5a13
Dpc flags = 0x4080000
MBX flags = 0x0
Link down Timeout = 030
Port down retry = 030
Login retry count = 030
Commands retried with dropped frame(s) = 0
Product ID = 0000 0000 0000 0000 SCSI Device Information:
scsi-qla0-adapter-node=9005962432112233;
#就是 WWNN
scsi-qla0-adapter-port=9005962432112233;
#就是 WWPN
scsi-qla0-target-0=2200000c50c22881;
scsi-qla0-target-1=2200000c50c237f6;
scsi-qla0-target-2=2200000c50c22acf;
scsi-qla0-target-3=2200000c50c22d14;
scsi-qla0-target-4=2200000c50c23157; FC Port Information:
scsi-qla0-port-0=2000000c50c22881:2200000c50c22881:0000e0:0;
scsi-qla0-port-1=2000000c50c237f6:2200000c50c237f6:0000dc:1;
scsi-qla0-port-2=2000000c50c22acf:2200000c50c22acf:0000da:2;
scsi-qla0-port-3=2000000c50c22d14:2200000c50c22d14:0000d9:3;
scsi-qla0-port-4=2000000c50c23157:2200000c50c23157:0000d6:4; SCSI LUN Information:
(Id:Lun) * - indicates lun is not registered with the OS.
( 0: 0): Total reqs 84, Pending reqs 0, flags 0x2, Dflags 0x0, 0:0:00 00
( 1: 0): Total reqs 82, Pending reqs 0, flags 0x2, Dflags 0x0, 0:0:01 00
( 2: 0): Total reqs 84, Pending reqs 0, flags 0x2, Dflags 0x0, 0:0:02 00
( 3: 0): Total reqs 84, Pending reqs 0, flags 0x2, Dflags 0x0, 0:0:03 00
( 4: 0): Total reqs 84, Pending reqs 0, flags 0x2, Dflags 0x0, 0:0:04 00 |
