Technical Product Specification

Intel® Server Boards S4600LH2/T2 TPS
Revision 2.0
149
3. AHCI HDD Staggered Spin-Up
Option Values: Enabled
Disabled
Help Text:
If enabled for the AHCI Capable SATA controller, Staggered Spin-Up will be performed on
drives attached to it. Otherwise these drives will all spin up at boot.
Comments: This option enables or disables Staggered Spin-up only for disk drives attached
to ports on the AHCI Capable SATA Controller. Disk drives attached to SATA/SAS ports on the Storage
Control Unit are controlled by a different method for Staggered Spin-Up and this option does not affect
them.
This option is only visible when the SATA Controller is enabled and AHCI or RAID has been selected
as the operational SATA Mode.
Staggered Spin-Up is needed when there are enough HDDs attached to the system to cause a marked
startup power demand surge when all drives start spin-up together. Since the power demand is
greatest just as the drive spinning is started, the overall startup power demand can be leveled off by
starting up each drive at a slightly different time, so the power demand surges for multiple drives do not
coincide and cause too great a power draw.
When Staggered Spin-Up is enabled, it does have a possibility of increasing boot time if there are many
HDDs attached, because of the interval between starting drives spinning. However, that is exactly the
scenario in which Staggered Spin-Up is most needed, because the more disk drives attached, the
greater the startup demand surge.
Setting the external eSATA connector Enabled (when available) does not invalidate the Staggered
Spin-Up option, although there may be less need for Staggered Spin-Up in a system configured for
eSATA use.
Back to [Mass Storage Controller Configuration Screen]
AHCI Capable RAID Options
Option Values: Intel
®
ESRT2 (LSI*)
Intel
®
RSTe
Help Text:
- Intel
®
ESRT2 (Powered By LSI*): Supports RAID 0/1/10 and optional RAID 5 with Intel
®
RAID
C600 Upgrade Keys. Uses Intel ESRT2 drivers (based on LSI* MegaSR).
- Intel
®
RSTe: Provides pass-through drive support. Also provides host based RAID 0/1/10/5
support. Uses Intel
®
RSTe drivers.
Comments: This option only appears when the SATA Controller is enabled, and RAID Mode
has been selected as the operational SATA Mode. This setting selects the RAID stack to be used for
SATA RAID with the onboard AHCI SATA controller.
If a RAID Volume has not previously been created that is compatible with the RAID stack selected, it
will be necessary to Save and Exit and reboot in order to create a RAID Volume.
Back to [Mass Storage Controller Configuration Screen
]