Fujitsu ETERNUS DX100 S3

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LDE may not be available when other functions are being used in the ETERNUS DX or the target

RAID group.

For details on the functions that can be executed simultaneously and the number of the process

that can be processed simultaneously, refer to "Combinations of Functions That Are Available for

Simultaneous Executions

" (page 203).

•

If drives of different capacities exist in a RAID group that is to be expanded while adding drives,

the smallest capacity becomes the standard for the RAID group after expansion, and all other

drives are regarded as having the same capacity as the smallest drive. In this case, the remain-

ing drive space is not used.

If drives of different rotational speeds exist in a RAID group, the access performance of the

RAID group is reduced by the slower drives.

Using the same interface speed is recommended when using SSDs.

When installing SSDs in high-density drive enclosures, using SSDs that have the same drive

enclosure transfer speed is recommended.

•

Since the data cannot be recovered after the failure of LDE, back up all the data of the volumes

in the target RAID group to another area before performing LDE.

•

If configuring RAID groups with Advanced Format drives, the write performance may be re-

duced when accessing volumes created in the relevant RAID group from an OS or an applica-

tion that does not support Advanced Format.

•

If the firmware version of the storage system is earlier than V10L88-6000 or earlier than

V10L89-6000, an error may occur due to a Flexible Write Through action while LDE is running

(*1). Before executing LDE, set "Flexible Write Through" to "Disable" with the "Setup Subsystem

Parameters" function.

*1 : When using the controller firmware for the China region, this applies to controller firm-

ware versions earlier than V10L88-9006

or earlier than V10L89-9006.

2. Basic Functions

Optimization of Volume Configurations

Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems

Design Guide (Basic)

P3AM-7642-32ENZ0

Fujitsu ETERNUS DX100 S3 - Page 60