If a disk fails completely and hot-relocation is enabled, the mail message lists the disk that failed and all plexes that use the disk. For example, you can receive mail as shown in this example display:
To: root Subject: Volume Manager failures on host teal Failures have been detected by the Veritas Volume Manager: failed disks: mydg02 failed plexes: home-02 src-02 mkting-01 failing disks: mydg02
This message shows that mydg02 was detached by a failure. When a disk is detached, I/O cannot get to that disk. The plexes home-02, src-02, and mkting-01 were also detached (probably because of the failure of the disk).