Known issue: unique identifier for drive

[Leo-Yan]

In current implementation, IDM lock manager uses ptable's UUID as its unique identifier. But it has risk for it might not the unique identifier for drives in big cluster.

This issue can be reproduced by below command:

# make check_lvmlockd_idm LVM_TEST_FAILURE_INJECTION=1 T=idm_ilm_fabric_failure.sh

To resolve this issue, some proposals for unique identifier:

• WWN;
• Seagate drive's model number + serial number.

Wait for Tom's suggestion for this.

[TProhofsky]

I know of two ways to get WWN:

1. udevadm info /dev/sdc |grep "ID_WWN="
2. ls -lta /dev/disk/by-id/wwn* |grep -v "-part"