Create Odx Buffer Volume - Fujitsu ETERNUS DX60 S3 User Manual

Chapter 7 Advanced Copy Management
7.9 ODX Management
7.9.3

Create ODX Buffer Volume

This function creates a dedicated volume for the ODX function.
ODX is a function that offloads the load on data copying and migration to the storage system. ODX copies data
at the time when a copy request is received. If a Write command is issued for the copy source data, this
function backs up the previous data in the area that is to be overwritten. An ODX Buffer volume is used to
store the backup data at this time.
The ODX function is supported by "Windows Server 2012".
ODX Buffer volume specification
• One ODX Buffer volume can be created in the ETERNUS DX.
• The type of the ODX Buffer volume is "Standard", "TPV", or "FTV".
• The capacity of an ODX Buffer volume is 1GB - 1TB.
• An ODX Buffer volume can be created when the ODX function is enabled.
• The ODX Buffer volume must be created with the ODX function.
• If the Thin Provisioning function is enabled, a "TPV" type ODX Buffer volume can be created.
• When creating an "FTV" type ODX Buffer volume, use ETERNUS CLI. ETERNUS Web GUI cannot be used to
create an "FTV" type ODX Buffer volume.
• When encryption mode is disabled, an ODX Buffer volume encrypted by CM cannot be created. Note that
when SEDs are not installed in the ETERNUS DX, an ODX Buffer volume encrypted by SEDs cannot be
created.
• If the maximum number of volumes is already registered in the ETERNUS DX, an ODX Buffer volume
cannot be created. Refer to
for the ETERNUS DX.
• If the maximum capacity for TPVs or FTVs is already registered in the ETERNUS DX, a "TPV" type ODX Buffer
volume cannot be created. For the maximum capacity, refer to "Settings (Thin Provisioning)" in "ETERNUS
Web GUI User's Guide (Operation)" for details. The maximum capacity is the same as the maximum pool
capacity.
• Only one ODX Buffer volume can be created in the ETERNUS DX. Use the [Setting] screen to check whether
an ODX Buffer volume is already created. Refer to "Setting (Advanced Copy)" in "ETERNUS Web GUI User's
Guide (Operation)" for details.
• An existing ODX Buffer volume can be checked by using the "Forbid Advanced Copy" field in the [Volume]
screen. Refer to "Volume (Basic Information)" in "ETERNUS Web GUI User's Guide (Operation)" for details.
• There are three types of ODX Buffer volumes: "Standard", "TPV", and "FTV". When creating an ODX Buffer
volume in a RAID group, select "Standard" for the volume type. When creating an ODX Buffer volume in a
TPP, select "Thin Provisioning" for the volume type. When creating an ODX Buffer volume in an FTRP, use
ETERNUS CLI. The ODX Buffer volume type is independent of the copy source volume type or the copy
destination volume type.
• Even when the ODX Buffer volume capacity is insufficient, no error occurs in an ODX session that is
already started. Windows Server suspends the use of ODX, and starts a normal copy process that uses
Read and Write processes.
"3.1 Create Volume" (page 253)
662
ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED
to check the maximum number of volumes
P2X0-1270-13ENZ0