You can recover from a quorum disk failure when sharing GAD volumes with UR in a GAD 3DC delta resync (GAD+UR) configuration.
You can use a volume in an external storage system or a drive in a server for the quorum disk. Procedures are based on the assumption that a volume in an external storage system is used as the quorum disk and depend on either of the following statuses:
- Able to access either volume of the GAD pair from the server
- Not able to access either volume of the GAD pair from the server
To check whether you can access the volumes of a GAD pair from the server, use I/O mode for the GAD pair.
Command example
pairdisplay -g oraHA -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 oraHA dev1(L) (CL1-A-0, 0, 0)811111 2222.S-VOL PSUS NEVER , 100 4444 - - 0 - - - - L/L oraHA dev1(R) (CL1-C-0, 0, 0)822222 4444.P-VOL PAIR NEVER , 100 2222 - - 0 - - - - B/B
The server can access a volume whose I/O mode (R/W) is L/L (Local), and cannot access a volume whose I/O mode (R/W) is B/B (Block).