Table 53 Drive Characteristics - Fujitsu ETERNUS DX100 S4 Design Manual

5. Hardware Configurations
Optional Product Installation Conditions
MLC SSDs (with a 12Gbit/s or a 6Gbit/s interface speed) that are compatible with Extreme Cache
•
Pools
Value SSDs (with a 12Gbit/s interface speed) that are incompatible with Extreme Cache Pools
•
Value SSDs are available at a lower cost per capacity than conventional SSDs by optimizing the
guaranteed write endurance and the reserved space.
When random access (especially with write access) continues for several hours, the performance of
Value SSDs may be reduced compared with MLC SSDs that support Extreme Cache Pool.
Note that the product's actual capacity of a Value SSD differs from the capacity that is displayed in
ETERNUS Web GUI and ETERNUS CLI. For example, 2.00TB is displayed for a 1.92TB Value SSD.
To use SSDs, the controller firmware version of the ETERNUS DX must be V10L90-4000 or lat-
•
er, or V10L91-4000 or later (*1).
• If SSDs are installed in the high-density drive enclosure (6Gbit/s), the SSDs operate at 6Gbit/s
regardless of the interface speed.
• If SSDs installed in the ETERNUS DX are left without power for 12 weeks or longer, they may
lose data or become unusable. This is due to the characteristics of the NAND storage media.
To store SSDs without power for an extended period of time, perform the following actions.
- Turn on the ETERNUS DX and provide the SSDs with power for at least 10 days before 10
weeks pass since the SSDs had no power.
- Back up the data in the SSDs regularly.
Backing up the current data to another area is recommended just before turning off the
ETERNUS DX.
When storing SSDs without power, keep the ambient temperature of the ETERNUS DX below
-
40°C.
To store SSDs for an extended period of time and then reuse them without using their data,
-
delete the RAID groups that are configured with those SSDs and then delete the data before
cutting the power. For details, refer to
*1 : When using the controller firmware for the China region, the controller firmware version
must be V10L90-9004 or later, or V10L91-9004 or later.
The drive characteristics of SAS disks, Nearline SAS disks, and SSDs are shown below.

Table 53 Drive Characteristics

Type
SAS disks
Nearline SAS Disks
SSDs
◎: Very good ¡: Good △: Reasonable
*1: Bits are used to compare the prices for each drive type and the price goes up in the following
order; ◎, ¡, and △.
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
"Drive Sanitization" (page
Reliability
¡
△
◎
184
Copyright 2023 Fujitsu Limited
198).
Performance
¡
△
◎
Price (*1)
¡
◎
△
P3AM-7642-32ENZ0