SRDF Commands

The following are SRDF Commands and what they are used for.
Composite SRDF commands
1. Failover:
1. Actions:
1. Write disables (WD) R1
2. Sets link to Not Ready (NR)
3. Write enables R2
2. Command:
symrdf -g ${group} failover
2. Update: Helps to speed up the failback operation by copying invalid tracks before write disabling any disks.
1. Actions:
1. Leaves service state as is.
2. Merges the tracks
3. Copies invalid tracks
2. Command:
symrdf -g ${group} update
3. Failback:
1. Actions:
1. Write disables R2
2. Suspends RDF link
3. Merges the disk tracks.
4. Resumes the link
5. Write enables R1
6. Copies the changed data
2. Command:
symrdf -g ${group} failback
4. Split: Leaves both R1 & R2 in write enabled state.
1. Actions:
1. Suspends the rdf link.
2. Write enables R2
2. Command:
symrdf -g ${group} split
5. Establish:
1. Actions:
1. Write disables R2
2. Suspends the rdf link
3. Copies data from R1 to R2
4. Resumes the rdf link.
2. Command:
symrdf -g ${group} [ -full ] establish
6. Restore: Copies data from R2 to R1
1. Actions:
1. Write disables both R1 & R2
2. Suspends the rdf link.
3. Merges the track tables
4. Resumes the rdf link.
5. Write enables R1
2. Command:
symrdf -g ${group} [ -full ] restore
Singular SRDF commands
1. Suspend: symrdf -g ${group} suspend
2. Resume: symrdf -g ${group} resume
3. Set mode: symrdf -g ${group} set mode sync
symrdf -g ${group} set domino on
symrdf -g ${group} set acp_disk skew 1000