4-8
Using the Universal Volume Manager GUI
Hitachi Universal Storage Platform V/VM Universal Volume Manager User’s Guide
–
Capacity (blocks)
: capacity of the external volume in Blocks.
–
Cache Mode
: displays whether the write data from the host to the
external storage system is propagated synchronously (
Disable
) or
asynchronously (
Enable
). Data that is not written by the host (for
example, data written by ShadowImage) is asynchronously destaged to
the external storage system regardless of the
Cache Mode
setting.
–
Inflow Control
: displays whether the writing operation to the cache
memory is stopped (
Enable
) or continued (
Disable
) when the writing
operation to the external volume is impossible.
–
Path Mode
: Indicates how the cross-subsystem paths work. The
displayed modes of the cross-subsystem path are as follows:
–
Single
: For the Single mode, the only cross-subsystem path with
the highest priority (primary path) is used to execute the I/O to the
external volume. When an error occurred in the primary path, the
path with the second highest priority is used.
–
Multi
: For the Multi mode, all of the cross-subsystem paths that
you configured are used at the same time. The multiple paths are
used to execute the I/Os to the external volume distributing the
work load.
–
Ext. VOL Info
: information about the external volume. When the
external volume is an SATA drive of the TagmaStore AMS/WMS storage
system or the Thunder 9500V series storage system, “ * ” is displayed.
For the operation of the SATA drive, follow the method of the
TagmaStore AMS/WMS or Thunder 9500V storage system.
–
Ext. VOL Status
: status of the operation executed to the external
volume or status of the connection of the mapping path. For the
displayed status descriptions, see Table 4-3. To check status of each
LDEV in the external volume, you need to view the VLL window.
–
Progress:
displays when the
Status
is
Cache Destage
. The progress
status of destaging processing is displayed in 1 % to 99 %.
–
Characteristic2
: extended identification number of the external
volume. This information is used for identifying volumes in the EVA
storage system.
•
Cross-subsystem Paths
The following items are displayed:
–
Priority
: Priority of the cross-subsystem paths. “
1
” indicates the cross-
subsystem path with the highest priority.
–
Port
: The port number in the local storage system connecting to the
external storage system.
–
WWN
: Identification number of the port in the external storage system.
•
Pop-up Menu
Right-click a row in the
External Volumes
(at the top of the window) to
perform the following operations from the pop-up menu.
