oraASM raw disk is empty after reboot

[Lakshmikanth Baddam]

yesday i had strange issue with my linux system. I rebooted the server, and somehow one of hte oraASM disk lost the info and now unable to start the database.

my disk config is this..

lrwxrwxrwx 1 root root 8 Jul 24 21:43 oraASMdat01.b0000.4191 -> ../dm-13
lrwxrwxrwx 1 root root 8 Jul 24 21:43 oraASMdat01.b0000.4191p1 -> ../dm-14
lrwxrwxrwx 1 root root 8 Jul 24 21:43 oraASMdat01.b0000.4191p2 -> ../dm-15

so here the oraASM disk 4191p1 lost the info from this raw disk. rest all is fine. how it could have caused.

/dev/oracle/oraASMdat01.b0000.4037p1 DG_DB_LX82_0000:DG_DB_LX82:DG_DB_LX82_0000
/dev/oracle/oraASMdat01.b0000.4038p1 DG_FRA_LX82_0000:DG_FRA_LX82:DG_FRA_LX82_0000
/dev/oracle/oraASMdat01.b0000.4191p1
/dev/oracle/oraASMdat01.b0000.4192p1 DG_DB_MSTPT_LX82_0001:DG_DB_MSTPT_LX82:DG_DB_MSTPT_LX82_0001

pvscan output

PV /dev/mpath/oraASMdat01.b0000.4191p2 VG vg_lx82_002 lvm2 [6.22 GB / 228.00 MB free]
PV /dev/mpath/oraASMdat01.b0000.4192p2 VG vg_lx82_002 lvm2 [6.22 GB / 6.22 GB free]

If you need any info, please let me know. Any suggestions would be appreciated.