Specification	DS2246	DS4243 DS4246[1]	DS4486	DS14mk4 FC DS14mk2 AT
Rack units	2U	4U	4U	3U
Drives per shelf enclosure	24	24	48	14
High-capacity disk drives	N/A	1TB, 2TB, and 3TB[1]	3TB	DS14mk2 AT: 1TB and 2TB
Performance disk drives	450GB and 600GB at 10k RPM	300GB, 450GB, and 600GB at 15k RPM	N/A	DS14mk4 FC: 300GB, 450GB, and 600GB at 15k RPM[1]
Self-encrypting disk drives	600GB at 10k RPM, 256-bit AES	600GB at 15k RPM, 128-bit AES[1]	N/A	N/A
Solid state drives	N/A	100GB[1]	N/A	N/A
Drive form factor	2.5” small form factor	3.5” large form factor	3.5” large form factor	3.5” large form factor
Drive carrier	Single drive	Single drive	Tandem (dual) drives	Single drive
Interface to controllers	6Gbps SAS	DS4243: 3Gbps SAS DS4246: 6Gbps SAS	6Gbps SAS	DS14mk4 FC: 4Gbps FC-AL DS14mk2 AT: 2Gbps FC-AL
Out-of-band management	√	√	√	N/A
NetApp® MetroCluster™ support	√	√		√

^[1] The DS4246 disk shelf currently only supports “Mixed Shelf” configurations combining 100GB SSDs with 1TB or 3TB high-capacity disk drives. In the future, the DS4246 will also support homogenous configurations of high-capacity (1TB, 2TB, or 3TB) disk drives. Performance hard disk drives of 15K RPM, existing encryption hard disk drives, and homogenous configurations of 100G SSDs are not supported.