HP P6000 Replication Solutions Manager User Guide (T3680-96089, October 2012)

Mirrorclone FAQ
• How can I tell a mirrorclone from other types of virtual disks?
Because mirrorclones are not independent virtual disks, they are identified differently than
original (independent) virtual disks. See virtual disk Types.
• How long does it take to create a mirrorclone?
A mirrorclone requires only a matter of seconds to create.
• What do the terms synchronized and fractured refer to?
When a mirrorclone is in a synchronized state, the local replication link to its source is active.
Changes to data on the source are automatically replicated to the mirrorclone.
When a mirrorclone is in a fractured state, the local replication link is inactive. Changes to
data on the source are not replicated to the mirrorclone.
See Synchronized mirrorclones and Fractured mirrorclones.
• When can a host read from or write to a mirrorclone?
Hosts can read from and write to fractured mirrorclones but not synchronized mirrorclones.
• After I create a mirrorclone, can I delete the source virtual disk?
No.
• Can I make multiple mirrorclones of a virtual disk?
No. See “Mirrorclone guidelines” (page 265).
• What is the maximum number of mirrorclones on a storage system?
There is no limit.
• Can I create a mirrorclone of a mirrorclone?
No.
• Can I create snapclones of a mirrorclone?
No.
• Can I create snapshots of a mirrorclone?
Yes.
• Can I use the round robin feature to make multiple snapshots of a fractured mirrorclone?
Yes.
• Can I create mirrorclones of virtual disks that are in DR groups?
Yes, but only with specific versions of controller software. See Controller software features -
local replication
Mirrorclone guidelines
The following general guidelines apply:
• The array must have a local replication license. See Replication licenses overview.
• A mirrorclone can be in a different disk group than its source. For optimum protection from
hardware failures, HP recommends creating a mirrorclone in a different disk group than its
source. (A mirrorclone is created in the same disk group as its source, unless specified
otherwise.)
• The redundancy (Vraid) level of a mirrorclone can be the same, lower, or higher than its
source. See Redundancy level (Vraid).
Virtual disk concepts 265