A.6
Enclosure Cooling
The Ultrastar Data60 has an advanced thermal algorithm running within the logical enclosure services process
called the SEP that monitors all of the temperature sensors in the enclosure. The SEP makes adjustments
to the fan speeds based upon the thermal sensors. The fan algorithm takes into account the component and
the warning and critical threshold limits defaulted and managed by the SEP controller. If any temperature
sensor exceeds the temperature threshold configured in the SES pages, the fan speed will increase to cool
the enclosure. If the enclosure encounters low temperatures, the enclosure will reduce fan speed in an attempt
to conserve power and not over-cool the enclosure. This algorithm is agnostic to effects of altitude and humidity.
The algorithm works based on temperatures within the enclosure with emphasis on reducing power
consumption.
The rack that the Ultrastar Data60 is installed in must not restrict airflow to the enclosure. Racks with doors
should be tested to ensure they do not constrict airflow to the enclosure. If the enclosure reaches critical
temperature, it will go into low-power mode to avoid damage to the enclosure.
When the Ultrastar Data60 is extended out of the rack, the cover of the enclosure remains inside the rack
which exposes the drives. This feature allows for easier access to drives and simplifies maintenance tasks
related to internal components. However, there is a limit to the amount of time the enclosure can be extended
out of the rack before the enclosure will begin to overheat.
Attention: Limit the amount of time that the enclosure is extended out of the rack to only what is
necessary to exchange a component or perform regular maintenance and should be limited to a
maximum of 5 minutes total. Never extend the enclosure out for longer than 5 minutes to prevent
overheating. Only extend the enclosure out of the rack as far as necessary to service components.
The enclosure is equipped with a sensor that will be tripped when the enclosure's top cover has been
opened resulting in the rear fans increasing to max speed. In the event that a fan has failed, it must be
replaced before any other CRUs and should be removed from the enclosure within 30 seconds of
removing the enclosure cover.
A.7
Host Connectivity
The following table displays the approved power cable:
Table 68: Approved Power Cable
Vendor Part Number
Part Number
Type
BC314-BC313-UL
1EX0064
BizLink Technology Power Cord, 3m, C13-C14, 14AWG
High quality passive cables that are no longer than 4 meters in length can be used for SAS connections from
the host to Ultrastar Data60. Active cables must be used for Ultrastar Data60 to Ultrastar Data60 daisy chaining
connections. The Ultrastar Data60 may use passive cables (limited to 4m or less) or active cables (any length).
The following table displays the approved SAS cables for passive and active types.
Table 69: Approved SAS Cables
Vendor Part Number
Part Number
Type
10117949-3030LF
1EX0329
Passive - Amphenol FCI I/O Cable, HD Mini-SAS to HD
Mini-SAS, 3m, 28AWG, Qty 2
217
A
Site and System Operation Requirements
User Guide
A.6
Enclosure Cooling
