RM23712 TPS
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5. System Storage and Peripheral Drive Bay Overview
RM23712 has support for a variety of different storage options, including:
Support for 12 Front Mount Hot Swap 2.5’’ SAS/SATA Drives
Accessory Kit option to support for 2 RearMount2.5’’ Hot Swap Drives
Support for different storage and peripheral options will vary depending on the system model and/or
available accessory options installed. This section will provide an overview of each available option.
5.1 Front Mount Drive Support
RM23712 supports 12x3.5” front mounted drives and provides front panel I/O and front control panel
support.
Figure 27. 12x3.5’’ Drive Bay Configuration
5.2 System Fan RVI and Hard Disk Drive Storage Performance
Hard disk drive storage technology, which utilizes the latest state-of-the-art track density
architectures, are susceptible to the effects of system fan rotational vibration interference (RVI)
within the server system. As system fan speeds increase to their upper limits (>80% PWM or >
10,200 RPM), hard disk drive performance can be impacted.
Chenbro publishes a list of supported hard drives on its Tested Hardware and OS List (THOL). In
general, unless identified in the NOTES column in the THOL, all listed hard drives have been tested
to meet Chenbro performance targets when the systems fans are operating above 80% PWM and/or
the system is operating at or below the platform ambient thermal limit of 35°C (95°F).
The THOL may also list hard drives that are only recommended for use in non-extreme operating
environments, where the ambient air is at or below 20°C (68°F) and /or the hard drives are installed
in system configurations where the system fans regularly operate below 80% PWM. Hard drives that
require these support criteria for a given system will include an “Environmental Limitation” tag and
message in the THOL “NOTES” column for that device. Using these drives in the more extreme
operating environments puts these devices at higher risk of performance degradation.
Chenbro recommends the following general support guidelines for server systems configured with
hard drive storage technology:
Avoid sustained server operation in extreme operating environments. Doing so will cause the
system fans to operate at their upper speed limits and produce higher levels of RVI which could
affect hard drive performance.
NOTE: Solid State Drive (SSD) performance is not impacted by the effects of system fan RVI.
5.3 External Hot Swap Drive Carriers
Each SAS/SATA hard disk drive or SSD that interfaces with a backplane is mounted to a hot swap
drive carrier. Drive carriers include a latching mechanism used to assist with drive extraction and
drive insertion.
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