I/O error

Symptoms
WebSphere MQ changes to single BSDS mode and issues the user message:
CSQJ126E +CSQ1 BSDS ERROR FORCED SINGLE BSDS MODE

This is followed by one of the following messages:

CSQJ107E +CSQ1 READ ERROR ON BSDS
           DSNAME=... ERROR STATUS=...
 
CSQJ108E +CSQ1 WRITE ERROR ON BSDS
           DSNAME=... ERROR STATUS=...
System action
The BSDS mode changes from dual to single.
System programmer action
None.
Operator action
Carry out these steps:
  1. Use Access Method Services to rename or delete the damaged BSDS and to define a new BSDS with the same name as the BSDS that had the error. Example control statements can be found in job CSQ4BREC in thlqual.SCSQPROC.
  2. Issue the WebSphere MQ command RECOVER BSDS to make a copy of the good BSDS in the newly allocated data set and reinstate dual BSDS mode. See also Recovering the BSDS.