HP StorageWorks XP Remote Web Console Software - Manual (Page 9)

2 About Compatible PAV Operations
Components
The components which are involved in Compatible PAV operations are:
•
Base devices and alias devices on the storage system (see “Base Devices and Alias Devices”
(page 9) )
•
Controller emulation type for the storage system (see “Controller Emulation Type” (page 10) )
•
Compatible PAV enabled on the storage system and on the Remote Web Console computer
(see
“Compatible PAV Software and License Key” (page 10) )
•
HCD definitions for the storage system (see “HCD Definitions for the Compatible PAV Devices”
(page 10) )
•
WLM host software definitions for dynamic alias management (see “WLM Host Software
Definitions for Dynamic Alias Management” (page 11) )
•
Enabling XP Compatible Hyper PAV (see “Enabling XP Compatible Hyper PAV” (page 11)
Base Devices and Alias Devices
Abstract
The storage system supports a maximum of 65,280 logical devices (LDEVs), up to 256 LDEVs per
Logical Control Unit (LCU) image and up to 255 LCU images. The number of LDEVs per parity
group depends on the hard disk drive (HDD) type, RAID level, and device emulation type (for
example, 3390-3R) of the parity group. Each LDEV is uniquely identified by its LDEV ID, which
consists of the LDKC number (00, 01), LCU image number (00, 01, 02...FE) and device number
(00-FF hexadecimal) (for example, x01:00:0F = device 0F on LCU image 00 in LDKC).
Abstract
The host recognizes that one LDKC (2 per storage system) is one device having up to 65,280
LDEVs. The storage system provides the LDKC serial number for the host recognizing the device
per LDKC. The storage system supports only LDKC number 00 currently.
LDEVs which are formatted as zSeries and S/390 devices (for example, 3390, 3380) are called
logical volume images (LVIs) or volumes.Compatible PAV operations can only be performed on
3390 or 3380 LVIs.
The two device types for Compatible PAV operations are:
•
Base device − 3390B or 3380B: A base device is an LDEV that is currently used within a
formatted LVI can contain user data and to which one or more alias devices can be assigned.
A base device must be defined to the host as a 3390B or 3380B device type (for example,
3390B-3, 3390B-9).
CAUTION: You cannot use as a base device any device that has been used: as a journal
volume of Hitachi Universal Replicator™ for Mainframe, as a system disk, or as a migration
volume.
•
Alias device − 3390A or 3380A: An alias device is a formatted but unused logical device
whose LDEV ID (address) can be used as an alias for a base device. Alias devices cannot be
varied online. Each alias must be within the same logical CU image as the base device to
Components 9