Hitachi ShadowImage for z/OS user guide (HIT9503-96007, October 2007)

40 ShadowImage for the XP1024/XP128/XP12000/XP10000/SVS 200

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:

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

• Use TC390 to provide remote backup copies of SI390 S-VOLs.

Figure 10 SI390 and TC390: shared S-VOL/M-VOL

Table 10 Host pair status reporting for SI390/TC390 shared volumes

Number of SI390

S-VOLs

Number of TC390 Pairs Pair Status Reported by

XP1024/XP128/XP12000/XP10000/SVS 200

00 Simplex

1 0 SI390 pair status

2 or more 0 SI390 pair status for the pair whose T-VOL has the

lowest LDEV ID

TC390

pair status

TC390

pair status

2 or more 1

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 Not current Not current

Duplex Not current Not current CURRENT

SP-Pending Not current Not current CURRENT

V-Split Not current Not current CURRENT

Split CURRENT CURRENT CURRENT

Resync Not current Not current CURRENT

Resync-r - - CURRENT

Suspended Not current Not current Not current