Disk Restrictions
When using VCS in combination with VIO servers and their client partitions, you need to ensure that no reservations are placed on the shared storage. This enables client partitions on different systems to access and use the same shared storage.
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If the shared storage is under MPIO control, set the reserve_policy attribute of the disk to no_reserve.
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If the shared storage is not under MPIO control, look up the array documentation to locate a similar attribute to set on the disk.
Internal testing on EMC disks shows that this field maps as the reserve_lock attribute for EMC disks. In this case, setting it to no achieves the same result.