HP XP20000 User Manual page 34

Item Description
The tree lists items such as parity groups, channel adapters (CHAs), disk processors
(DKPs), and so on.
No icon is displayed below the Cache folder.
Tree
The numbers on the right of icons (
Group folder are IDs of parity groups or external volume groups. An ID beginning with
E indicates that the group is an external volume group.
A volume existing in an external storage system and mapped to a volume in the HP
StorageWorks XP24000/XP20000 Disk Array by using XP External Storage is called
an external volume. An external volume group is a number of external volumes grouped
together for managing and that do not contain any parity information, unlike a parity
group. However, the Auto LUN window treats external volume groups the same as parity
groups for convenience.
The parity group icon (
groups that are concatenated. If two or more parity groups are concatenated, volumes
can be striped across two or more drives. Therefore, concatenated parity groups provide
faster access (particularly, faster sequential access) to data.
For example, if the parity group icon (
1-3 appears on the right of the icon. If the parity group icon indicates two or more
parity groups that are connected together, all the connected parity groups appear on
the right of the icon. For example, if the parity group 1-3 is connected with the parity
group 1-4, the text 1-3[1-4] appears on the right of the parity group icon. (All the
parity groups connected with 1-3 are enclosed by square brackets).
NOTE:
Remote Web Console does not allow you to connect two or more parity groups.
To use connected parity groups, contact the service representative.
34 Using the Performance Monitor Windows
Parity Group or External Group icon:
a parity group or an external volume group
CHA folder icons (the channel adapter number and number of ports shown on the
right side of the icon are examples):
an ESCON channel adapter
a FICON channel adapter
a Fibre Channel adapter in Standard mode
a Fibre Channel adapter in High Speed mode
a Fibre Channel adapter in Initiator/External MIX mode
DKA folder icons:
a disk processor (DKP)
a data recovery and reconstruction processor (DRR)
Access Path Usage icons:
an access path
) can represent a single parity group or two or more parity
) displayed below the Parity Group or External
) indicates a single parity group 1-3, the text