ASM Disk Group Problem

Hi,

Thanks for that. I had a look at the alert log and it obviously complained around the time when the hardware panick happened, it tried to take some of the disks offline. Below is a snippet from when the problem started:

Code:

Thu Dec 20 14:00:42 2007 WARNING: offlining disk 4.4042410621 (DGGROUP_0004) with mask 0x3 NOTE: PST update: grp = 1, dsk = 4, mode = 0x6 Thu Dec 20 14:00:42 2007 Errors in file /opt/oracle/product/10.2.0/asm/admin/+ASM/bdump/+asm_gmon_8677.trc: ORA-27091: unable to queue I/O ORA-27072: File I/O error Linux Error: 5: Input/output error Additional information: 4 Additional information: 4088 Additional information: -1 Thu Dec 20 14:00:42 2007 WARNING: offlining disk 4.4042410621 (DGGROUP_0004) with mask 0x3 NOTE: PST update: grp = 1, dsk = 4, mode = 0x6 Thu Dec 20 14:00:42 2007 WARNING: offlining disk 4.4042410621 (DGGROUP_0004) with mask 0x3 NOTE: PST update: grp = 1, dsk = 4, mode = 0x6 Thu Dec 20 14:00:42 2007 WARNING: offlining disk 3.4042410622 (DGGROUP_0003) with mask 0x3 NOTE: PST update: grp = 1, dsk = 3, mode = 0x6 Thu Dec 20 14:00:43 2007 WARNING: offlining disk 3.4042410622 (DGGROUP_0003) with mask 0x3 NOTE: PST update: grp = 1, dsk = 3, mode = 0x6 Thu Dec 20 14:00:43 2007 Errors in file /opt/oracle/product/10.2.0/asm/admin/+ASM/bdump/+asm_gmon_8677.trc: ORA-27091: unable to queue I/O ORA-27072: File I/O error Linux Error: 5: Input/output error

Apart from that i cannot see anything untoward, i also did a check all on the diskgroup and it returned without any errors.

Will dismounting the diskgroup and mounting it again help?

This kfed utility, i have not heard of before, will it essentially provide the same information we are getting from v$asm_disk?

Thanks very much for your help so far.

Chucks