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Figure 24 Volume Operation List when Path Group is Clicked

TheVolumeOperation list consists of:

• Externa

l Volumes

The following items are displayed:

• ExG: external volume group number and reference number assigned to each volume in the

external volume group. This is displayed in the format of external volume group number -

reference number of volume in the group. The reference numbers of volumes in the group are

automa

tically assigned by External Storage when the external volumes are mapped.

• LDEV: LDKC:CU:LDEV number* which is assigned to the external volume. When multiple

LDEVs are created in the external volume, the top LDEV number is displayed, and [...] is

displa

yed at the end of the number.

* LDKC: Logical Disk Controller

CU: Control Unit

• Charac

teristic1:identiﬁcation number of the external volume.

• Device: product name that is reported to the host by the external volume. The displayed items

differs depending on the vendor of the storage system.

• Capac

ity (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).

• 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

cros

s-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.

XP24000 External Storage Software User’s Guide

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Hp XP External Storage Software Manual do Utilizador Página 55