Hp XP Continuous Access Software Bedienungsanleitung PDF herunterladen (Seite 40)

40 Continuous Access XP for the XP1024/XP128

S-VOL using the S-VOL’s LDEV ID in the host command. The BC remote console software displays the

LDEV ID and BC pair status of all S-VOLs associated with a P-VOL.

Figure 15 through Figure 18 show various Continuous Access XP/BC configurations that share volumes.

Continuous Access XP supports synchronous and asynchronous operations for shared Continuous Access

XP/BC volumes.

• Figure 15 shows an example of a Continuous Access XP P-VOL that also functions as a BC P-VOL.

With this configuration, use BC for on-site data backup if a Continuous Access XP failure occurs, and

use Continuous Access XP to provide remote backup of the BC P-VOL if a BC failure occurs.

Figure 15 Shared Continuous Access XP P-VOL and shared BC P-VOL

• Figure 16 shows an example of a Continuous Access XP S-VOL that also functions as a BC P-VOL.

With this configuration, use BC to provide multiple backup copies of a single Continuous Access XP

P-VOL.

Figure 16 Shared Continuous Access XP S-VOL and shared BC P-VOL

Table 10 Host pair status reporting for Continuous Access XP, BC, and Continuous Access XP/BC

shared volumes

Number of Continuous

Access XP pairs

Number of BC

S-VOLs

Pair status reported by disk array

00Simplex

01BC pair status

0 2 or more BC pair status for pair whose S-VOL has lowest LDEV ID

Continuous Access XP pair status

1 2 or more

Continuous Access XP pair status

Table 11 Data currency of a shared Continuous Access XP/BC volume

Continuous

Access XP pair

status

BC pair status

COPY (PD) PAIR COPY (SP) PSUS COPY (RS/RS-R) PSUE

COPY Not current Not current Not current CURRENT Not current Not current

PAIR Not current Not current Not current CURRENT Not current Not current

PSUS/PSUE Not current CURRENT CURRENT CURRENT CURRENT Not current

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