Powering on the GAD+UR primary storage system

Use the following procedure to power on the primary storage system in a GAD 3DC delta resync environment.

Procedure

  1. Power on the primary storage system.

  1. Confirm that the storage systems do not have any blocked parts.

If any parts are blocked, recover them.

  1. Check for SIMs about path blockage, and delete the SIMs.

  1. On the GAD secondary storage system, resynchronize the GAD pair by specifying the S-VOL (swap resync).

Command example: pairresync -g oraHA -swaps -IH1

A volume on the primary storage system changes to an S-VOL, and a volume on the secondary storage system changes to a P-VOL.

  1. Confirm that the pair statuses are changed as shown in the following table.

Pair type

Before the GAD pair resync

After the GAD pair resync

P-VOL

S-VOL

P-VOL

S-VOL

GAD pair

PSUS (Block)

SSWS (Local)

PAIR (Mirror(RL))

PAIR (Mirror(RL))

UR delta resync pair

PSUE1

SSUS2

PSUE1

SSUS2

UR pair

PAIR

PAIR

PAIR

PAIR

Notes:

  1. Device Manager - Storage Navigator displays HOLDING.

  1. Device Manager - Storage Navigator displays HOLD.

  1. Keep updating I/O to the P-VOL or GAD S-VOL for two minutes.

The information on the system configuration is reported among the primary, GAD secondary, and UR secondary storage systems. At the time, the UR delta resync pair status is changed from PSUE to PSUS. The mirror status of the journal is displayed as PJNS. Confirm that no failure SIMs are displayed.

Next steps

The GAD P-VOL and S-VOL are now reversed compared to the original configuration before the planned outage. To restore the original configuration, reverse the GAD P-VOL and S-VOL.