HP StorageWorks IP Storage Router - Manual (Page 65)

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