2570393 - DB12 / DB13 backup failed with SQL2419N error

•  DB12 backup session is failing with the below errors.
   ENOSPC (28) "No space left on device"
  
   Diagnostic log
   ========
  
• DB13 backup reports error similar to  
  

  Backup_Dev:  SQL Code: 2419-

  Backup_Dev:  SQL Message: SQL2419N Thetarget disk "path"_Full_Online_Backup"

  Backup_Dev:  as become full row=1

• Below error can be seen in Db2diag.log
  ================================

  2017-10-09-01.32.51.709111+480 E717328435A871 LEVEL: Severe
  PID : ******** TID : 27393 PROC : db2sysc 0
  INSTANCE: *****NODE : 000 DB : ****
  APPHDL : 0-******APPID: ********
  AUTHID : DB2<SID>
  EDUID : ****** EDUNAME: db2agent (***) 0
  FUNCTION: DB2 UDB, database utilities, sqlubMWWarn, probe:1187
  MESSAGE : SQL2419N The target disk "" has become full.
  DATA #1 : SQLCA, PD_DB2_TYPE_SQLCA, 136 bytes
  sqlcaid : SQLCA sqlcabc: 136 sqlcode: -2419 sqlerrml: 0
  sqlerrmc:
  sqlerrp : sqlubMWW
  sqlerrd : (1) 0x00000000 (2) 0x00000000 (3) 0x00000000
  (4) 0x00000000 (5) 0x00000000 (6) 0x00000000
  sqlwarn : (1) (2) (3) (4) (5) (6)
  (7) (8) (9) (10) (11)
  sqlstate:

• DB2 LUW 9.7 and above.
• SAP ERP 6.0

Self-Tuning Memory Manager, STMM, destination full, Memory, 136 sqlcode: -2419 Backup_Dev:  SQL Code: 2419- , KBA , BC-DB-DB6 , DB2 Universal Database for Unix / NT , Problem