FUJITSU Disk Storage System DX60 - Manual (Page 43)

ETERNUS DX60 S2 Disk storage system User’s Guide -Operation-
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Copyright 2012 FUJITSU LIMITED P3AM-5512-03ENZ0
Chapter 3 Setup
This chapter describes the required settings for operation of the ETERNUS DX Disk storage
system and provides notes for setting up the ETERNUS DX Disk storage system.
3.1 Data Encryption
Encrypting data as it is being written to the disk prevents information leakage caused by fraudu-
lent decoding.
Even if a disk is removed and stolen by malicious third parties, data cannot be decoded.
The encryption function only encrypts the data stored on the disks, so server access results in
the transmission of plain text. Therefore, this function is effective against leakage of data being
transferred via sneaker net, but has no effect on data leakage via server access.
This section describes the restrictions and notes on encrypting data.
For details on the data encryption procedure, refer to "ETERNUS Web GUI User's Guide" or
"ETERNUS CLI User's Guide".
• Encrypted volumes cannot be changed to unencrypted volumes.
To cancel the encryption for a volume, back up the data in the encrypted volume, delete the
encrypted volume, and restore the backed up data.
• When copying encrypted volumes (using copy operations via server), transfer performance
may not be as good as when copying unencrypted volumes.
• Snap Data Pool Volumes (SDPVs) cannot be encrypted after they are created. To create an
encrypted SDPV, set encryption when creating a volume.
3.2 Eco-mode
Eco-mode is a function that is specifically designed to reduce the power consumption that is
characteristic of Massive Arrays of Idle Disks (MAID). Eco-mode saves power by managing the
scheduled operation times of specified disks and stopping the motors of disks during periods
when they are not required.
Disk spin-up and spin-down schedules can be set for each RAID group, and can also be set to
allow backup operations.
If an access occurs while a motor is stopped, the disk is immediately spun up and access pro-
ceeds normally after approximately one to three minutes.
The disk motors can be turned on and off as required by linking the following Storage Foundation
Software ETERNUS SF to Eco-mode.
• ETERNUS SF Storage Cruiser
• ETERNUS SF AdvancedCopy Manager