Overview: The Next Generation Mass Storage Stack (September 2009)

Table Of Contents

The following three formats are three different representations of the same LUN. A single LUN can have all of the

following addresses.

• 0/2/1/0.1.6.0.0.2.1

0/4/1/0.1.6.0.0.2.1

• 0/2/1/0.0x500805f300083891.0x4011000000000000

0/4/1/0.0x500805f300083891.0x4011000000000000

• 64000/0xfa00/0x3

In the sample configuration, the LUN is multi-pathed with two hardware paths. The first two addresses represent

the hardware paths in legacy format, the next two addresses represent the paths in lunpath format, and the final

address represents the single LUN hardware path.

To view alternate path formats for a specific hardware path, specify it as an argument to ioscan –H with the –m

hwpath option. If you do not specify a hardware path, ioscan displays all hardware paths for all mass storage

devices. For example, to see all the hardware paths for device at legacy hardware path 0/2/1/0.1.6.0.0.2.0,

enter the following command:

# ioscan –m hwpath –H 0/2/1/0.1.6.0.0.2.0

Lun H/W Path Lunpath H/W Path Legacy H/W Path

64000/0xfa00/0x4

0/2/1/0.0x500805f300083891.0x4010000000000000 0/2/1/0.1.6.0.0.2.0

To see all the hardware paths for the sample configuration, enter the following command:

# ioscan –m hwpath

Lun H/W Path Lunpath H/W Path Legacy H/W Path

64000/0xfa00/0x0

0/1/1/0.0x1.0x0 0/1/1/0.1.0

64000/0xfa00/0x1

0/1/1/0.0x0.0x0 0/1/1/0.0.0

64000/0xfa00/0x3

0/2/1/0.0x500805f300083891.0x4011000000000000 0/2/1/0.1.6.0.0.2.1

0/4/1/0.0x500805f300083891.0x4011000000000000 0/4/1/0.1.6.0.0.2.1

64000/0xfa00/0x4

0/2/1/0.0x500805f300083891.0x4010000000000000 0/2/1/0.1.6.0.0.2.0