實戰Fibre Channel之六: 發起端和目的端常用命令

Fibre Channel作為一種專用、高速網絡，和iSCSI相比，提供了更高的數據傳輸帶寬、速度和可靠性。熟練掌握一些常用Fibre channel的一些命令，可以方便我們進行原型驗證、調試和開發。下面總結了筆者常用到的一些命令，就當拋磚迎玉吧。

A. FC 發起端

1. 看主機FC HBA wwpn:

cat /sys/class/fc_host/host*/port_name | sed -e s/0x// -e ‘s/../&:/g‘ -e s/:$//

2. 看對端機器FC相關設置

看wwpn:

[[email protected] rport-12:0-0]# cat /sys/class/fc_remote_ports/rport-12\:0-0/port_name

0x21000024ff684921

[[email protected] rport-12:0-0]# cat /sys/class/fc_remote_ports/rport-12\:0-0/scsi_target_id

-1

看角色：

[[email protected] rport-12:0-0]# cat /sys/class/fc_remote_ports/rport-12\:0-0/roles

FCP Initiator

看24位的port ID:

[[email protected] rport-12:0-0]# cat /sys/class/fc_remote_ports/rport-12\:0-0/port_id

0x0000e8

看發起端的

[[email protected] rport-12:0-0]# cat /sys/class/fc_remote_ports/rport-12\:0-0/dev_loss_tmo

30

[[email protected] rport-12:0-0]# cat /sys/class/fc_remote_ports/rport-12\:0-0/fast_io_fail_tmo

off

3. rescan devices after FC fail-over:

[[email protected] var]# cd /sys/class/scsi_host/

[[email protected] scsi_host]# for i in `ls `; do echo "- - -" > $i/scan ; done

[[email protected] scsi_host]# lsscsi -si

[0:0:0:10] disk Leadstor swtich_vol 1.0 /dev/sdc 360014055e652dee8e232d50cbd3665c2 1.07GB

[0:0:0:20] disk Leadstor fc_failover 1.0 /dev/sdd 36001405d3b6e11ace2a8f7f6b00ba7cc 2.19TB

[1:0:0:0] disk ATA SanDisk SD7SB6S1 X355 /dev/sda SanDisk_SD7SB6S128G1001_162609801097 128GB

[2:0:0:0] disk ATA ST2000DM001-1ER1 CC62 /dev/sdb - 2.00TB

[7:0:0:3] disk Leadstor fc_vol 1.0 /dev/sde 36001405c410df1475de9e08ab3f8b9ef 1.07GB

[7:0:0:4] disk Leadstor fc_all_vol 1.0 /dev/sdf 36001405f4807a693420c2c7b98ad996b 1.07GB

[7:0:0:15] disk Leadstor fc_0801vol2 1.0 /dev/sdg 3600140546e63e0728bb357aad6a3d91a 2.14GB

[7:0:0:20] disk Leadstor fc_failover 1.0 /dev/sdh 36001405d3b6e11ace2a8f7f6b00ba7cc 2.19TB

4. 如何發起枚舉FC target上的盤

在initiator 上運行下面的命令：

## step 1: extend the time-out setting for initiator

for i in `ls /sys/class/fc_host`

do

echo "Extend time out for $i"

echo 90 > /sys/class/fc_host/$i/dev_loss_tmo

done

## step 2: Trigger to discorvery and login to target

for i in `ls /sys/class/fc_host`

do

echo "Trigger $i to discovery target"

echo 1 > /sys/class/fc_host/$i/issue_lip

done

B. FC Target端

1. 看target 相關設置

[[email protected] qla2xxx]# pwd

/sys/kernel/config/target/qla2xxx

[[email protected] qla2xxx]# cat 21\:00\:00\:0e\:1e\:c2\:3e\:a0/

fabric_statistics/ tpgt_1/

[[email protected] qla2xxx]# cat 21\:00\:00\:0e\:1e\:c2\:3e\:a0/fabric_statistics/

cat: 21:00:00:0e:1e:c2:3e:a0/fabric_statistics/: Is a directory

[[email protected] qla2xxx]# cat 21\:00\:00\:0e\:1e\:c2\:3e\:a0/tpgt_1/

acls/ attrib/ auth/ enable lun/ np/ param/

[[email protected] qla2xxx]# cat 21\:00\:00\:0e\:1e\:c2\:3e\:a0/tpgt_1/enable

1

2. 解決target端默認不是target 模式的問題

基於qlogic HBA 卡，CentOS中當期默認按照initiator模式加載驅動。但在存儲服務器端，它必須每次都以target模式加載。 為此需要做下面的修改：

edit : /etc/grub2.cfg

linux16 /vmlinuz-3.10.0-229.el7.x86_64+ root=/dev/mapper/centos-root ro rd.lvm.lv=centos/root rd.lvm.lv=centos/swap crashkernel=auto rhgb quiet LANG=en_US.UTF-8 systemd.debug qla2xxx.qlini_mode="disabled"

然後運行grub2-mkconfig，最後重啟機器後默認就按照target模式加載qla2xxx驅動。

本文出自 “存儲之廚” 博客，轉載請與作者聯系！

實戰Fibre Channel之六: 發起端和目的端常用命令