ISCSI 命令用法

 

 

Here are some quick notes on how to do the most common tasks.

Discover available targets from a discovery portal

iscsiadm -m discovery -t sendtargets -p ipaddress  

Log into a specific target

iscsiadm -m node -T targetname -p ipaddress -l  

Log out of a specific target

iscsiadm -m node -T targetname -p ipaddress -u

Display information about a target

iscsiadm -m node -T targetname -p ipaddress

Display statistics about a target

iscsiadm -m node -s -T targetname -p ipaddress

Remove the portal address to receive information or statistics about all targets.

Display list of all current sessions logged in

iscsiadm -m session

View iSCSI database regarding discovery

iscsiadm -m discovery -o show

View iSCSI database regarding targets to log into

iscsiadm -m node -o show

View iSCSI database regarding sessions logged into

iscsiadm -m session -o show

View if the targets are multipathed (MPIO)

multipath -ll

If it is multipathed, you will see output like below (this is an example of two LUNs, both multipathed).  Note that this show the MPIO mode is round-robin:

36000d77100000b117de986015d5d5746 dm-7 EQL,DISK [size=20G][features=0][hwhandler=0][rw] \_ round-robin 0 [prio=0][active] \_ 12:0:0:0 sdb 8:16  [active][ready] \_ 13:0:0:0 sdd 8:48  [active][ready] 36000d771000002767de9860330139e10 dm-8 EQL,DISK [size=200G][features=0][hwhandler=0][rw] \_ round-robin 0 [prio=0][active] \_ 12:0:0:1 sdc 8:32  [active][ready] \_ 13:0:0:1 sde 8:64  [active][ready]