Which statement on shadow migrations is true?
A.
Shares are unavailable to clients during shadow migration.
B.
The source filesystem or directory must be read-only.
C.
It uses interposition and requires a separate physical machine.
D.
Migration from LUNS is supported.
Explanation:
When shares are created, they can optionally “shadow” an existing
directory, either locally or over NFS. In this scenario, downtime is scheduled once, where the
source appliance X is placed into read-only mode, a share is created with the shadow property
set, and clients are updated to point to the new share on the Sun Storage 7000 appliance. Clients
can then access the appliance in read-write mode.
Sun ZFS Storage 7000 System Administration Guide,ShadowMigration