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Table 32 requirements for shadowimage - flashcopy, Shadowimage - flashcopy pair status, 35 shadowimage - flashcopy pair status transition – HP StorageWorks XP Remote Web Console Software User Manual

Page 83: 32 requirements for shadowimage - flashcopy

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ShadowImage for z/OS user guide

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T-VOL where the T-VOL (the virtual or physical copy of the S-VOL) is available for both read and write

operations.
When you establish a relationship for an ShadowImage - FlashCopy pair, you can specify a range of data

to be copied, which is called the “extent.” When the extent data copy is complete, the relationship ends

automatically.
You can establish an ShadowImage - FlashCopy pair not only for SI390 simplex volumes, but also for

SI390 S-VOL or T-VOL in the split or duplex status.

When the SSID boundary is 64-LDEV, S-VOL and T-VOL must be established in the same CU image and

SSID.

When a relationship is established and the SSID boundary is changed from 256-LDEV to 64-LDEV, the

SSIDs for T-VOL and S-VOL become different. Because of this condition, the relationship cannot be

deleted from the host. In this case, you should delete the relationship from SI390 on the Remote

Console PC.

ShadowImage - FlashCopy Pair Status

The following figure illustrates the pair status transition and the relationship between the pair status and the

ShadowImage - FlashCopy operations.

Figure 35

ShadowImage - FlashCopy pair status transition

NOTE:

When the extent data copy fails, the ShadowImage - FlashCopy relationship ends automatically

(the status becomes simplex) and the T-VOL is blocked.

Table 32

Requirements for ShadowImage - FlashCopy

Item

Requirement

Controller emulation type

I-2105

SSID boundary setting

256-LDEV (The SSID boundary of IBM ESS is 256-LDEV.)