To solve the DRBD Unknown problem:

To solve the DRBD Unknown problem:

Cs:standalone Ro:secondary/unknown Ds:uptodate/dunknown R-----

Method One:

Executes on the selected non-master node
Drbdadm secondary data
DRBDADM----Discard-my-data connect MySQL
Execution on the master node
Drbdadm Connect Data

If the above method does not work:

Re-initialize

Drbdadm Detach Data
# # #dd If=/dev/zero bs=1m count=100 of=/dev/sdb1
drbdadm down Data
Drbdadm CREATE-MD Data

Executes on the master node
Drbdadm Connect Data

To solve the DRBD Unknown problem: