Use the following procedure to reverse the GAD P-VOL and S-VOL when sharing GAD volumes with UR in a GAD 3DC delta resync (GAD+UR) configuration.
- Suspend the GAD pair by specifying the S-VOL (swap
suspend).
Command example: pairsplit -g oraHA -RS -IH0
- Resynchronize the GAD pair by specifying the S-VOL (swap
resync).
Command example: pairresync -g oraHA -swaps -IH0
If a failure occurs after the one volume capacity of a GAD pair can be expanded, the creation, resync, swap resync, and horctakeover operations of the GAD pair cannot be performed because the capacity of both the volumes is not the same. Make sure to expand the other volume capacity so that the capacity of both the volumes is the same, and then retry the operation.
The volume on the primary storage system changes to a P-VOL, and the volume on the GAD secondary storage system changes to an S-VOL.
- Keep updating I/O from the server to the P-VOL or S-VOL of the GAD pair for about two minutes.
- Confirm that the UR delta resync P-VOL pair status is PSUS.
Command example:
pairdisplay -g oraDELTA -fxce -IH0 Group PairVol(L/R) (Port#,TID, LU),Seq#, LDEV#.P/S, Status,Fence, %, P-LDEV# M CTG JID AP EM E-Seq# E-LDEV# R/W oraDELTA dev2(L) (CL1-A-1, 0, 1) 811111 2222. P-VOL PSUS ASYNC ,0 6666 - 0 0 - - - - -/- oraDELTA dev2(R) (CL1-A-1, 0, 1) 844444 6666. S-VOL SSUS ASYNC ,0 2222 - 0 0 - - - - -/-
- Confirm that the mirror status of the journal of the UR delta
resync pair is PJNS.
Command example:
pairdisplay -g oraDELTA -v jnl -IH0 JID MU CTG JNLS AP U(%) Q-Marker Q-CNT D-SZ(BLK) Seq# Num LDEV# 000 1 1 PJNS 4 21 43216fde 30 512345 62500 1 39321
- Confirm that no failure SIMs are displayed.