HP XP20000 User Manual page 40

Item Description
Lists parity groups, external volume groups, and V-VOL groups.
Box folders (for example, Box 1, Box E1, Box V1, and Box X1) are displayed below
the storage system folder. The number at the end of a Box folder name indicates the
number at the beginning of parity group ID, external volume group ID or V-VOL group
ID. For example, if you double click the Box 1 folder, the tree displays a list of parity
groups whose IDs begin with 1 (for example, 1-1 and 1-2). At the right of each ID, the
RAID level appears and Protection level appear. When you select a parity group, the
list on the right lists volumes in the parity group.
The IDs of external volume groups are beginning with the letter E. Therefore, a folder
whose number begins with the letter E, such as Box E1, contains external volume groups.
For example, if you double click the Box E1 folder, the tree displays a list of external
volume groups whose IDs begin with E1 (for example, E1-1 and E1-2). The external
volume groups do not have parity in formation, and no RAID level appears at the right
of IDs. The data protection level appears as <SATA-E> only when the data protection
level is set to the enhanced mode on the SATA drive.
A volume existing in an external storage system and mapped to a volume in the
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 same as parity groups
for convenience.
When HP StorageWorks XP Snapshot Software is used, the IDs of V-VOL groups begin
with V. When HP StorageWorks XP Thin Provisioning Software is used, the IDs of V-VOL
groups begin with X. Therefore, if a folder number ends with the letter V or X, such as
Box V1 or Box X1, it contains V-VOL groups.
For example, if you double-click the Box V1 folder, the tree displays V1-1, which is a
V-VOL group ID beginning with V1. If you double-click the Box V2 folder, the tree displays
Tree V2-1, which is a V-VOL group ID beginning with V2. The V-VOL groups do not have
parity information, and no RAID level appears at the right of IDs.
Unlike a parity group, a V-VOL group is a group of virtual volumes and does not contain
any parity information. However, Auto LUN windows treat V-VOL groups the same as
parity groups for convenience.
The parity group icon (
groups that are connected together. If two or more parity groups are connected together,
volumes can be striped across two or more drives. Therefore, connected 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:
40 Using the Performance Monitor Windows
) can represent a single parity group or two or more parity
Remote Web Console does not allow you to connect two or more parity groups.
To use connected parity groups, contact the service representative.
When the XP Business Copy or Hitachi ShadowImage™ for Mainframe quick
restore operation is being performed, a Remote Web Console window may
display old information (status before the quick restore operation) on volume
(LDEV) configurations.
In this case, wait until the quick restore operation completes, and then click
File, Refresh on the menu bar of the Remote Web Console main window to
update the Remote Web Console window.
) indicates a single parity group 1-3, the text