DATOptic RM12-S6.TB - Rackmount - Manual (Page 40)

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WEB BROWSER-BASED CONFIGURATION
• Stagger Power On Control
In a PC system with only one or two drives, the power can sup-
ply enough power to spin up both drives simultaneously. But in
systems with more than two drives, the startup current from
spinning up the drives all at once can overload the power supply,
causing damage to the power supply, disk drives and other sys-
tem components. This damage can be avoided by allowing the
host to stagger the spin-up of the drives. The SATA drives have
supported the staggered spin-up capabilities to boost reliability.
The staggered drive spin-up is a very useful feature for manag-
ing multiple disk drives in a storage subsystem. It gives the host
the ability to spin up the disk drives sequentially or in groups,
allowing the drives to come ready at the optimum time without
straining the system power supply. The staggered drive spin-up
in a multiple drive environment also avoids the extra cost of a
power supply designed to meet short-term startup power de-
mand as well as steady state conditions.
The 6Gb/s SATA RAID controller has included the option for
customer to select the disk drives sequentially staggered power
up value. The values can be selected from 0.4 to 6 seconds per
step which powers up one drive.
6.8.3 HDD Power Management
The 6Gb/s SATA RAID controller has automated the ability to
manage HDD power based on usage patterns. The “HDD Power
Management” allows you to choose a “Stagger Power On Control”,
“Low Power Idle”, “Low RPM” and completely “Spins Down Idle
HDD”. It is designed to reduce power consumption and heat gen-
eration on idle drives.