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Table 5: target and lun mapping example, Table 6: target-only mapping example – HP StorageWorks IP Storage Router User Manual

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Software Overview

65

IP Storage Router SR2122-2 User Guide

Table 5: Target and LUN Mapping Example

With target-only mapping, an iSCSI target name is specified and mapped to the
physical storage address of a storage controller only; a WWPN. Any LUNs that
are available in the storage controller are made available as iSCSI LUNs and are
numbered the same as the LUNs in the storage controller. For example, if an
iSCSI target specified as Webserver2000 were mapped to the physical storage
address WWPN 3100112233445577, and LUNs 0 through 2 were available in that
controller, those LUNs would become available as three iSCSI LUNs. An iSCSI
driver would see the iSCSI target named Webserver2000 as a controller with three
iSCSI LUNs identified as LUN 0, LUN 1, and LUN 2. Each iSCSI LUN would
appear as a separate storage device to a host.

Table 6: Target-only Mapping Example

Apparent to

Host

iSCSI Target

iSCSI LUN Available

Physical

Storage

Address

Physical LUN

Available

Local Disk (D:)

Database

LUN 9

WWPN

31001122334

45566

LUN 12

Apparent as one

locally attached

storage device

Database

appears as one

controller with one

LUN available

iSCSI LUN is

numbered as specified

and can be different

than the physical LUN

number

Specifies the

storage address

of the storage

controller

The LUN

number is

specified as the

only LUN to be

mapped

Apparent to

Host

iSCSI Target

iSCSI LUN

Available

Physical Storage

Address

Physical LUN

Available

Local Disk (D:)

Webserver2000

LUN 0

WWPN

3100112233445577

LUN 0

Local Disk (E:)

Webserver2000

LUN 1

WWPN

3100112233445577

LUN 1

Local Disk (F:)

Webserver2000

LUN 2

WWPN

3100112233445577

LUN 2

Apparent as

three locally

attached storage

devices

Webserver2000

appears as one

controller with one

LUNs 0, 1, and 2

available

iSCSI LUNs are

numbered the

same as

physical LUNs

Specifies the storage

address of the storage

controller

LUNs 0, 1,

and 2 are

available for

mapping

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