Luse guidelines – HP XP Array Manager Software User Manual
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To create an open-systems volume (LU) larger than 2.8 TB, you must use LUSE to combine
open-systems volumes.
Whether hosts can access a volume larger than 2 TB depends on the operating systems of the
hosts. Hosts running the following operating systems can access LUSE volumes larger than 2 TB:
•
AIX 5.2 TL08 or later
•
AIX 5.3 TL04 or later
•
Windows Server 2003 SP1 or later
•
Red Hat Enterprise Linux AS 4 Update 1 or later
Cautions:
•
Other operating systems do not support LUs larger than 2 TB. If other operating systems are
used by hosts, make sure that the LUs are not larger than 2 TB.
•
For information about the maximum LU capacity supported by your operating system, contact
the vendor of your operating system.
LUSE Guidelines
lists the specifications and restrictions for LDEVs used to configure a LUSE volume.
“Specifications and Restrictions on LDEVs Released From a LUSE Volume” (page 7)
lists the
specifications and restrictions for LDEVs released from a LUSE volume.
Table 1 Specifications and Restrictions on LDEVs Used to Configure a LUSE Volume
Specifications and Restrictions
No.
Open volumes (OPEN-3, OPEN-8, OPEN-9, OPEN-E, OPEN-L, and OPEN-V) are supported.
1
The number of LDEVs combined into a LUSE volume must be within the range of 2 to 36.
1
2
The emulation type of the LDEVs combined into a LUSE volume must be the same.
3
HP recommends that the RAID level of the LDEVs that are to be combined into LUSE volumes should
be the same.
2
4
LDEVs or LUSE volumes that are to be combined must not have assigned path definitions. For this
reason, the volumes used by Hitachi TrueCopy™ for Mainframe, HP StorageWorks XP Continuous
Access Software, Hitachi ShadowImage for Mainframe, HP StorageWorks XP Business Copy
Software, and HP StorageWorks XP Continuous Access Journal Software pair volumes, and HP
StorageWorks XP Snapshot cannot be targets of LUSE operations (see
).
5
LDEVs that are to be combined into LUSE volumes must not be reserved for HP StorageWorks XP
Auto LUN Software.
For more information on XP Auto LUN, contact HP technical support. See
for instructions.
6
When you combine a LUSE volume with another LUSE volume, the range of LDEVs should not
overlap.
3
7
The maximum capacity of a LUSE volume is 60 TB.
4
8
Combining command devices into a LUSE volume is not supported.
9
The access attribute must be set to Read/Write.
10
Combining internal volumes, external volumes, and virtual volumes (V-VOLs) is not supported.
11
While online, the host mode must not be 0x0C (Windows) or 0x01 (VMWare).
12
The cache mode settings for LDEVs combined into a LUSE volume must be the same.
13
All LDEVs combined into a LUSE volume must be of the same drive type (however, SATA drives and
BD drives can be intermixed).
14
6
About LUSE Operations