ASM Debugging Info

ASM Debugging Information

If you have an ASM issue, you'll want these commands handy.

cat /etc/*release

uname -a

rpm -qa|grep oracleasm

/usr/sbin/oracleasm configure

/sbin/modinfo oracleasm

/etc/init.d/oracleasm status​

/usr/sbin/oracleasm-discover

oracleasm scandisks

oracleasm listdisks

ls -l /dev/oracleasm/disks

/sbin/blkid

ls -l /dev/mpath/*

ls -l /dev/mapper/*

ls -l /dev/dm-*

another approach...

1. uname -a
2. rpm -qa | grep oracleasm
3 cat /etc/sysconfig/oracleasm
4. upload /var/log/oracleasm
5. cat /proc/partitions
6. ls -la /dev/oracleasm/disks
7. /etc/init.d/oracleasm scandisks
8. /etc/init.d/oracleasm listdisks
9. Run "sosreport" from command line. That will generate a bzip file. Attach it to SR
10. Send me following command outputs
a. cat /proc/partitions |grep sd|while read a b c d;do echo -n $d$'\t'" scsi_id=";(echo $d|tr -d [:digit:]|xargs -i scsi_id -g -s /block/{})done
b. blkid|grep sd.*oracleasm|while read a b;do echo -n $a$b" scsi_id=";(echo $a|tr -d [:digit:]|tr -d [:]|cut -d"/" -f3|xargs -i scsi_id -g -s /block/{})done;
11. Also you can verify the disk has correct header as follows:
# dd if=/dev/path/to/disk bs=16 skip=2 count=1 | hexdump -C
example:
# dd if=/dev/mapper/data0p1 bs=16 skip=2 count=1 | hexdump -C
1+0 records in
1+0 records out
16 bytes (16 B) copied, 0.037821 seconds, 0.4 kB/s
00000000 4f 52 43 4c 44 49 53 4b 44 41 54 41 30 00 00 00 |ORCLDISKDATA0...|

Reference note: Troubleshooting a multi-node ASMLib installation (Doc ID 811457.1)