ERROR: PST-initiated MANDATORY DISMOUNT of group ARCH

I still use oracle asm libs.

but when i created diskgroup, i found errors


Mon Mar 27 11:32:27 2006
NOTE: start heartbeating (grp 2)
NOTE: cache opening disk 0 of grp 2: ARCH label:ARCH
Mon Mar 27 11:32:27 2006
NOTE: F1X0 found on disk 0 fcn 0.0
NOTE: cache mounting (first) group 2/0x07C8FC8D (ARCH)
* allocate domain 2, invalid = TRUE
kjbdomatt send to node 1
Mon Mar 27 11:32:27 2006
NOTE: attached to recovery domain 2
Mon Mar 27 11:32:27 2006
NOTE: cache recovered group 2 to fcn 0.0
Mon Mar 27 11:32:27 2006
NOTE: opening chunk 1 at fcn 0.0 ABA
NOTE: seq=2 blk=0
Mon Mar 27 11:32:27 2006
NOTE: cache mounting group 2/0x07C8FC8D (ARCH) succeeded
SUCCESS: diskgroup ARCH was mounted
Mon Mar 27 11:32:28 2006
NOTE: cache initiating offline of disk 0 group 2
WARNING: offlining disk 0.4060613754 (ARCH) with mask 0x3
NOTE: PST update: grp = 2, dsk = 0, mode = 0x6
Mon Mar 27 11:32:28 2006
ERROR: too many offline disks in PST (grp 2)
Mon Mar 27 11:32:28 2006
NOTE: halting all I/Os to diskgroup ARCH
Mon Mar 27 11:32:28 2006
ERROR: PST-initiated MANDATORY DISMOUNT of group ARCH
NOTE: cache dismounting group 2/0x07C8FC8D (ARCH)



However, I don't understand when i stoped asm then restart oracle asm lib.
Then i started ASM again and mount disk.

i don't found it.


oh.....

don't understand.........