138 Administering dynamic multipathing (DMP)

Displaying the paths to a disk

devicetag:

c1t0d3

type:

simple

hostid:

zort

disk:

name=mydg04 id=962923652.362193.zort

timeout:

30

group:

name=mydg id=962212937.1025.zort

info:

privoffset=128

flags:

online ready private autoconfig autoimport imported

pubpaths:

block=/dev/vx/dmp/c1t0d3

privpaths:

char=/dev/vx/rdmp/c1t0d3

version:

2.1

iosize:

min=1024 (bytes) max=64 (blocks)

public:

slice=0 offset=1152 len=4101723

private:

slice=0 offset=128 len=1024

update:

time=962923719 seqno=0.7

headers:

0 248

configs:

count=1 len=727

logs:

count=1 len=110

Defined regions:

 

config

priv

000017-000247[000231]:copy=01 offset=000000

disabled

 

 

 

config

priv

000249-000744[000496]:copy=01 offset=000231

disabled

 

 

 

log

priv

000745-000854[000110]:copy=01 offset=000000

disabled

 

 

 

lockrgn

priv

000855-000919[000065]: part=00 offset=000000

Multipathing information:

numpaths:

2

 

 

c1t0d3 state=enabled

type=secondary

c4t1d3 state=disabled

type=primary

In the Multipathing information section of this output, the numpaths line shows that there are 2 paths to the device, and the following two lines show that the path to c1t0d3 is active (state=enabled) and that the other path c4t1d3 has failed (state=disabled).

The type field is shown for disks on Active/Passive type disk arrays such as the EMC CLARiiON, Hitachi HDS 9200 and 9500, Sun StorEdge 6xxx, and Sun StorEdge T3 array. This field indicates the primary and secondary paths to the disk.

The type field is not displayed for disks on Active/Active type disk arrays such as the EMC Symmetrix, Hitachi HDS 99xx and Sun StorEdge 99xx Series, and IBM ESS Series. Such arrays have no concept of primary and secondary paths.