Figure 177 Extreme Cache Module Installation Diagram; Table 106 Pfm Installation Example - Fujitsu ETERNUS DX S5 Series Design Manual

6. Hardware Configurations
Installation Conditions and Installation Rules
Caution
• The Extreme Cache function is not available because PFMs cannot be installed in the ETERNUS DX60 S5/
DX100 S5/DX200 S5.
• PFMs are installed in drive slots of the controller enclosure and the slots can be used by PFMs or drives.
PFMs cannot be installed in slots where a drive is already installed.
■
Policies for Estimating Extreme Cache
When installing Extreme Cache, select an Extreme Cache capacity according to the physical capacity of the read
access target drive.
Install PFMs with a capacity that is 8% of the read access target volume capacity in the ETERNUS DX.
Table 106 PFM Installation Example
Capacity of volumes to be read
Up to 20TB
40TB or less
60TB or less
:
Up to 620TB
621TB or more
■
Installation Order
The installation priority order for the Extreme Cache modules is shown below.
1
Extreme Cache (1.6TB)
2
Extreme Cache (3.2TB)
The diagram below shows an Extreme Cache module installation.
Install the Extreme Cache modules to the controller enclosure in the following order according to the priority:
SLOT23, SLOT22, SLOT21, SLOT20, SLOT19, SLOT18, SLOT17, and SLOT16.
When following the standard installation rules, install the PFMs equally among the controller enclosures of the
ETERNUS DX.
Figure 177 Extreme Cache Module Installation Diagram
BBU#0
Installable PFM capacity
1.6TB
3.2TB
1.6TB
4.8TB
49.6TB
51.2TB
BCU BTU
Front view of a controller enclosure
Number of PFMs
1.6TB ´ 1
3.2TB ´ 1
1.6TB ´ 2
1.6TB ´ 1
3.2TB ´ 1
1.6TB ´ 3
3.2TB ´ 15
1.6TB ´ 1
3.2TB ´ 16
BBU#1
BCU
283
BTU
Design Guide