User Guide

The following DS Series 3.5-inch drives are supported:
High-performance solid-state drives (3 DWD and 10 DWD): 400 GB
Performance-optimized, enterprise class disk drives: 900 GB 10 K rpm
High-capacity, archival-class nearline HDDs: 2 TB, 4 TB, 6 TB, 8 TB, 10 TB, and 12 TB 7.2 K rpm
High-capacity, archival-class nearline self-encrypting disk drives: 4 TB 7.2 K rpm
The following drives are supported by the D3284 expansion units:
Capacity-optimized solid-state drives (1 DWD): 3.84 TB, 7.68 TB, and 15.36 TB
Mainstream solid-state drives (3 DWD): 400 GB
High performance solid-state drives (10 DWD): 400 GB
High-capacity, archival-class nearline disk drives: 4 TB, 6 TB, 8 TB, 10 TB, and 12 TB 7.2K rpm
All drives are dual-port and hot-swappable. Drives of the same form factor can be intermixed within the
appropriate enclosure, which provides the flexibility to address performance and capacity needs within a
single enclosure.
Up to nine ThinkSystem DS Series or up to three D3284 expansion units are supported by a single
ThinkSystem DS4200. Customers can intermix 3.5-inch and 2.5-inch DS Series 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.
Note: D3284 expansion units cannot be intermixed with the DS Series expansion units.
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
Lenovo ThinkSystem DS4200 Storage Array (withdrawn product) 3