example recovery scenarios, BSDS (bootstrap data set), bootstrap data set (BSDS), CSQJ126E message, CSQJ107E message, CSQJ108E message, renaming damaged BSDS, access method services (AMS), deleting damaged BSDS, AMS (access method services), CSQ4BREC sample" /> I/O error

 

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.