Hitachi MP-96RD625-01 manual Host Pair Status Reporting for URz/SIz Shared Volumes

Table 3-12 Host Pair Status Reporting for URz/SIz Shared Volumes

Number of

URz pairs

Number of SIz

T-VOLs

Pair status reported by USP V

0	0	Simplex
0	1	SIz pair status
0	2 or more	SIz pair status for the pair whose S-VOL has the lowest LDEV ID
1	0	URz pair status
1	1	URz pair status
1	2 or more	URz pair status

Table 3-13 Data Currency of a Shared URz/SIz Volume

SIz pair status

URz pair	Pending	Duplex	Split-	Split	Resync	Suspende
status	Duplex		Pending			d
Pending	Not current	Not current	Not current	CURRENT	Not current	Not
Duplex						current
Duplex	Not current	Not current	Not current	CURRENT	Not current	Not
						current
Suspended	Not current	CURRENT	CURRENT	CURRENT	CURRENT	Not
						current

Figure 3-8 through Figure 3-11 show the various URz/SIz configurations which share volumes.

•URz/SIz configurations which share the URz primary data volume and SIz S-VOL

Figure 3-8 shows an example of a URz primary data volume which is also functioning as a SIz S-VOL. This configuration allows you to use SIz for on- site data backup in case of a URz failure, and to use URz to provide remote backup of the SIz S-VOL in case of a SIz failure.

		URz
Primary	Master journal		Restore journal
	volume		volume
data
volume
S-VOL	SIz	Secondary	RCU
		data volume

T-VOL

MCU

Figure 3-8 Shared URz primary data volume and SIz S-VOL

3-26 Chapter 3 Preparing for Universal Replicator z/OS Operations

Hitachi Universal Replicator for IBM /OS User’s Guide