Check_MK upgrading (1.5.0p7.cee -> current stable 1.6.0p*)

Thanks for the answer,

I have checked the agent output and indeed, the 1st occurance is just a line (empty). Then, I see the following:
<<<oracle_asm_diskgroup>>>
MOUNTED EXTERN N 512 4096 4194304 51196 7668 0 7668 0 N ST_RAC_CIMB/
MOUNTED EXTERN N 512 4096 4194304 163836 77428 0 77428 0 N ST_RAC_CON/
MOUNTED EXTERN N 512 4096 4194304 10236 9900 0 9900 0 Y ST_RAC_CW/
MOUNTED EXTERN N 512 4096 4194304 262140 251720 0 251720 0 N ST_RAC_LOGS/
MOUNTED EXTERN N 512 4096 4194304 2289640 108868 0 108868 0 N ST_RAC_DATA/

<<<oracle_asm_diskgroup>>>
MOUNTED EXTERN N 512 512 4096 4194304 51196 7668 0 7668 0 N ST_RAC_CIMB/
MOUNTED EXTERN N 512 512 4096 4194304 163836 77428 0 77428 0 N ST_RAC_CON/
MOUNTED EXTERN N 512 512 4096 4194304 10236 9900 0 9900 0 Y ST_RAC_CW/
MOUNTED EXTERN N 512 512 4096 4194304 2289640 108868 0 108868 0 N ST_RAC_DATA/
MOUNTED EXTERN N 512 512 4096 4194304 262140 251720 0 251720 0 N ST_RAC_LOGS/

I guess the agent sees the disks, but cannot parse them for some reason?