Components And Connectors - Lenovo DS4200 Product Manual

Up to nine ThinkSystem DS Series expansion units are supported by a single ThinkSystem DS4200.
Customers can intermix 3.5-inch and 2.5-inch expansion enclosures behind a 3.5-inch or 2.5-inch
controller enclosure. This configuration delivers the added flexibility to mix 3.5-inch and 2.5-inch drives
within a single system (but not within the enclosure). More drives and expansion enclosures are designed
to be dynamically added with virtually no downtime, which helps to quickly and seamlessly respond to
ever-growing capacity demands.
The ThinkSystem DS4200 offers high levels of system and data availability with the following technologies:
Dual-active controller modules with low latency cache mirroring
Dual-port HDDs and SSDs with automatic drive failure detection and rapid RAID rebuild with global
hot spares
Redundant, hot-swappable and customer replaceable hardware components, including SFP/SFP+
transceivers, controller modules, expansion modules, power and cooling modules, and drives
Automated path failover support for the data path between the host and the drives with multipathing
software
Non-disruptive controller firmware upgrades for dual controller configurations with multipathing

Components and connectors

The following figure shows the front of the ThinkSystem DS4200 SFF chassis and the DS Series SFF
expansion unit.
Figure 2. ThinkSystem DS4200 SFF chassis and DS Series SFF expansion unit: Front view
The following figure shows the front of the ThinkSystem DS4200 LFF chassis and the DS Series LFF
expansion unit.
Figure 3. ThinkSystem DS4200 LFF chassis and DS Series LFF expansion unit: Front view
Lenovo ThinkSystem DS4200 Storage Array 3