Modular Storage Subsystem; Drive Bay And Raid Controller Configurations - Cisco UCS B420 M4 Installation And Service Note

Overview
Figure 3: SD Card Slots

Modular Storage Subsystem

The Cisco UCS B420 M4 blade server has two optional FlexStorage modular storage subsystems that can be
configured with SAS or SATA hard disk drives (HDDs) or solid state disks (SSDs). The product IDs for the
modular storage subsystems are as follows:
• UCSB-MRAID12G, Cisco FlexStorage 12G SAS RAID controller with drive bays
• UCSB-MRAID12G-HE, Cisco FlexStorage 12G SAS RAID controller with 2 GB flash-back write cache
• UCSB-LSTOR-PT, passthrough module with drive bays
• UCSB-LSTOR-BK, Cisco FlexStorage blanking panels without controller or drive bays
Because the blade server can be used without disk drives, it does not come with any modular storage subsystems
installed. Blanking panels should be used on a diskless UCS B420 M4 blade server to ensure proper airflow.
Order the same number of blanking panels as there are empty drive bays.
There are two RAID controller options for the modular storage subsystems. One supports RAID 0, 1, 10 and
the other supports RAID 0, 1, 10, 5, 6, with optional 2 GB flash-backed write cache, when four drives are
present.

Drive Bay and RAID Controller Configurations

The Cisco UCS B420 M4 blade server supports the following configurations of drive bays and RAID controllers.
and drive bays
Cisco UCS B420 M4 Blade Server Installation and Service Note
Modular Storage Subsystem
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