Create Rec Disk Buffer - Fujitsu ETERNUS DX60 S3 User Manual

Chapter 7 Advanced Copy Management
7.8 REC Management
7.8.7

Create REC Disk Buffer

This function creates an REC Disk Buffer.
When using the REC Consistency mode, REC Buffer shortage may occur due to errors (such as a bad line). Note
that the copy session status changes to "
time. The REC Disk Buffer is used for temporarily saving copy data to avoid these situations.
• Registering the license for the Advanced Copy feature is required to create an REC Disk Buffer.
• This function can only be used when the local storage system (the storage system that creates REC Disk
Buffers) supports REC.
• When encryption mode is disabled, an encrypted REC Disk Buffer cannot be created by CM.
• In the following conditions, REC Disk Buffers cannot be created;
- When multiple types of drives are combined in a single REC Disk Buffer
Refer to
- When resources for creating an REC Disk Buffer (such as the number of RAID groups and the number
of volumes) are insufficient
(When the maximum number of RAID groups or volumes is already registered in the ETERNUS DX, a
new REC Disk Buffer cannot be created.)
• When the REC Disk Buffer creation process is complete, the REC Disk Buffer will be formatted
automatically.
• When assigning multiple REC Disk Buffers to an REC Buffer, each REC Buffer has different conditions.
Refer to "7.8.8 Assign REC Disk Buffer" (page 649)
Drive combinations that can configure an REC Disk Buffer
Online
Nearline
SSD
Online SED (*1)
Nearline SED
SSD SED
OK: REC Disk Buffers can be created
Not recommended: REC Disk Buffers can be created, but not a recommended configuration
NG: REC Disk Buffers cannot be created
*1: In the controller firmware versions V10L31 and earlier, "SED" indicates "Online SED".
"Drive combinations that can configure an REC Disk Buffer" (page 645)
Online Nearline
OK
Not
recommended
Not OK
recommended
NG NG
NG NG
NG NG
NG NG
ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED
Halt" if the REC Buffer shortage extends past a certain period of
for details.
SSD Online SED
NG NG
NG NG
OK NG
NG OK
NG
Not
recommended
NG NG
645
for details.
Nearline SED SSD SED
NG NG
NG NG
NG NG
Not NG
recommended
OK NG
NG OK
P2X0-1270-13ENZ0