•
To use 10TB or larger Nearline SAS disks to configure RAID6-FR, the controller firmware version
of the
ETERNUS DX must be V10L86-4000 or later, or V10L87-4000 or later (*1).
•
Nearline SAS disks are used to store data that does not need the access performance of SAS
disks. They are far more cost effective than SAS disks. It is recommended that SAS disks be
used for data that is constantly accessed or when high performance/reliability is required.
•
If the ambient temperature exceeds the operating environment conditions, Nearline SAS disk
performance may be reduced.
•
Nearline SAS disks can be used as Advanced Copy destinations and for the storage of archived
data.
•
When Nearline SAS disks are used as an Advanced Copy destination, delayed access responses
and slower copy speeds may be noticed, depending on the amount of I/O and the number of
copy sessions.
•
The following disks are Advanced Format (512e) disks.
-
2.5" Nearline SAS disks (2TB)
-
3.5" Nearline SAS disks (6TB)
-
3.5" Nearline SAS disks (8TB)
-
3.5" Nearline SAS disks (10TB)
-
3.5" Nearline SAS disks (12TB)
-
3.5" Nearline SAS disks (14TB)
-
3.5" Nearline SAS self encrypting disks (8TB)
-
3.5" Nearline SAS self encrypting disks (12TB)
•
When using Advanced Format (512e) disks, make sure that Advanced Format (512e) is suppor-
ted by the server OS and the applications. If the server OS and applications do not support Ad-
vanced Format (512e), random write performance may be reduced.
•
For details on the RAID levels that can be configured with Nearline SAS disks that have 6TB or
more, refer to "Supported RAID" (page 16).
*1 : When using the controller firmware for the China region, the controller firmware version
must be V10L86-9006 or later, or V10L87-9006 or later.
● SSDs
SSDs are reliable drives with high performance. SSDs are used to store high performance databases
and other frequently accessed data.
Flash memory as a storage media provides better random access performance than disks such as
SAS disks and Nearline SAS disks. Containing no motors or other moving parts, they are highly re-
sistant to impact.
The ETERNUS DX
supports SSDs that have a high level wear leveling function and sufficient re-
served space. Note that if the expected total write capacity is exceeded, the frequency of errors
gradually increases, which may lead to a reduction in the write performance. The ETERNUS DX has
a function that shows the remaining capacity as a percentage (health) in proportion to the expec-
ted total write capacity.
The number of rewrites may exceed the limit within the product warranty period if SSDs are used in
a RAID1 configuration that has a high I/O access load. Using a RAID1+0, RAID5, RAID5+0, or RAID6
configuration is recommended.
The following types of SSDs are supported in the ETERNUS DX.
5. Hardware Configurations
Optional Product Installation Conditions
183
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems
Design Guide (Basic)
Copyright 2023 Fujitsu Limited
P3AM-7642-32ENZ0
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