11 currency of a shared si390 and tc390 volume – HP StorageWorks XP Remote Web Console Software User Manual

Page 37

ShadowImage for z/OS user guide

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SI390 supports multiple T-VOLs for each S-VOL. If you issue a pair status query to an SI390 S-VOL, the

status for only one SI390 pair is reported (the pair with the T-VOL with the lowest LDEV ID). To obtain

the pair status for the SI390 pair(s) with the other T-VOL(s), you must direct the host query to the specific

T-VOL using the T-VOL’s LDEV ID in the host command. The SI390 remote console software displays the

LDEV ID and SI390 pair status of all T-VOLs associated with an S-VOL.

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Reverse resync and quick restore operations can be performed on shared SI390/TC390 pairs only

when the TC390 pair is suspended.

Table 10

describes the host pair status reporting for SIz, URz volumes, and SIz/URz shared volumes; and

SI390 volumes, Universal Replicator for z/OS volumes, and ShadowImage and Universal Replicator for

z/OS shared volumes.

Table 11

lists the currency of the data on shared SI390/URz volumes based on the

SI390 and URz pair status.

The configuration shown in the following figure is an example of a volume that is functioning as both an

SI390 S-VOL and a TC390 M-VOL. With this configuration, you can:

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Use SI390 to provide on-site backup copies of TC390 M-VOLs.

Table 10

Host pair status reporting for SI390/TC390 shared volumes

Number of SI390

S-VOLs

Number of TC390 Pairs

Pair Status Reported by

XP128/XP1024/XP10000/XP12000

Simplex

SI390 pair status

2 or more

SI390 pair status for the pair whose T-VOL has the

lowest LDEV ID

TC390

pair status

TC390

pair status

2 or more

TC390

pair status

Table 11

Currency of a shared SI390 and TC390 volume

SI390 Pair Status

TC390 Pair Status
Pending

Duplex

Suspended

Pending

Not current

Duplex

Not current

CURRENT

SP-Pending

Not current

CURRENT

V-Split

Not current

CURRENT

Split

CURRENT

Resync

Not current

CURRENT

Resync-r

CURRENT

Suspended

Not current