AssuredCopy Quick StartAssuredCopy Quick Start
Dot Hill Systems NDA Material
AssuredCopy - Basic Facts
• Licensed feature• Takes advantage of our snapshot technology
But does not need licensed snapshots to work properly Does not impact snapshot count at all
• Can copy up to 255 volumes• Requires an annual support contract
AssuredCopy - Ability to copy a point in time data capture of either a master volume or a snapshot to a completely independent volume.
Dot Hill Systems NDA Material
Licensed Feature
• Must obtain a license key to use this feature
Dot Hill Systems NDA Material
AssuredCopy - Copy
• Manage > Volume Management > Volume Copy Services > Volume Copy Select Vdisk destination Enter Volume Name
Dot Hill Systems NDA Material
AssuredCopy - Status
• Manage > Volume Management > Volume Copy Services > Volume Copy Status Shows detailed information about volume copy
operation Last line gives % complete
The volume copy operation copies the entire volume, block for block.
So a sparsely populated 100GB volume and a fully populated 100GB volume will take the same amount
of time to copy.
Dot Hill Systems NDA Material
AssuredCopy - Abort
• Manage > Volume Management > Volume Copy Services > Abort Volume Copy Select Vdisk destination Enter Volume Name
Dot Hill Systems NDA Material
Volume Copy Operation
• Only works with master volumes or snapshots Must have an associated snap pool
A snapshot is taken and the copy process starts Can not mount the snapshot taken for the purpose of creating a
volume copy
If you create the copy from a snapshot you can mount the volume
• Once the copy operation is completed the snapshot is deleted Unless the volume copy was initiated from a snapshot to
begin with
Dot Hill Systems NDA Material
Additional Points and Restrictions• Additional points
When a volume copy is initiated on a master volume or the original data corresponding to a snapshot, the master volume and/or snapshot can continue to be accessed and updated.
Volume copies initiated on the master volume do not count against the snapshot license count
• Restrictions The source and destination of a volume copy must both be owned
by the same preferred controller. While the volume copy is in process, the new volume cannot be
mounted for access. If the copy is from the modified data of a snapshot, the snapshot
must first be unmounted from the host prior to starting the copy, and must remain unmounted through-out the copy process.
Copies of a standard volume is not supported. Volume Copy and Rollback cannot happen at the same time for the
same Master Volume.
Dot Hill Systems NDA Material
Scheduling Tasks• Schedule Task
Starting Date Recurrence Constraints Expiration Name
• Capability to schedule either an AssuredCopy or AssuredSnap operation
Dot Hill Systems NDA Material
CLI Commands
• Volume Copy: Volumecopy
Initiates a copy of a master volume or snapshot to a new volume
show volumecopy-status Show status for the volume copies in process
abort volumecopy Abort the specified volume copy
Dot Hill Systems NDA Material
AssuredCopy
• Description Complete physical and independent copy of a data volume (i.e., volume
copy) Discrete (vs. continuous) action Copy of a master or a snapshot volume
• Benefits Data protection
Additional protection against vdisk or complete volume failure Non-disruptive use of production data
Mitigate resource contention and performance impact on production volume
• Applications Data Restoration Backup Development & Test Decision Support and Data Mining Data Migration
Protect against data loss or corruption
Dot Hill Systems NDA Material
Competitive Matrix – Quick Look Dot Hill LSI Engenio HDS IBM
Platform 2730 1331/1333 AMS 100/200 DS4700
Product Name AssuredCopy R1SANtricity Volume
CopyShadowImage In-System
Replication SoftwareFlashCopy
Copy source volume Yes Yes Yes Yes
Persistent copy pair No Yes Yes Yes
Source volume available during copy process
Read/write Read only Read only
Volume copy available on copy initiation
Read/write upon copy complete
No No
Split Volume No Yes
# Target Volumes per Source Volume
255 per system; 127 per controller
8 9 8
# Target Volumes per system255 per system; 127 per controller
4,096
Intra-array creation - Alt. disk group diff. controller
No Yes Yes Yes
Scheduled Volume Copy Yes Yes Yes Yes
License Fee Yes Yes Yes Yes
License Model per subsystem per subsystem per subsystem per subsystem
Licenses Transferable No
We do not maintain any changes that have occurred in the original volume once
the copy has started While the volume is being copied, the source volume is available for
read/write operations
The volume being copied must reside on the same controller. After the copy has
completed, the physical disks can be relocated to a separate sub-system
A full Competitive Matrix is available at www.dothill.com