Western Digital Ultrastar DC HC560 20TB 7200rpm 512MB Cache 3.5 Inch SATA NAS Hard Drive

An innovative storage architecture to help customers meet their need for exponential data growth.

• 20TB capacity in a standard 3.5-inch form factor
• ePMR & CMR technology works with all capacity enterprise applications & environments
• OptiNAND for highest capacities
• Reliable, field-proven, 7th generation HelioSeal design delivers outstanding power efficiency
• Industry-leading HDD technologies; OptiNAND, EAMR, TSA, HelioSeal
• 2.5M hours (projected) MTBF rating & 5-year limited warranty

• Interface: SATA 6Gb/s
• Capacity: 20TB
• Format: Sector size (bytes) 4Kn: 4096, 512e: 512
• Areal Density (Gbits/sq. in, max): 1131
• Data buffer (MB): 512
• Rotational speed (RPM): 7200
• Latency average (ms): 4.16
• Interface transfer rate (MB/s, max): 600
• Sustained transfer rate (MB/s, max) / (MB/s, max): 291/277
• Random Read 4KB QD=32 (IOPS): 212
• Random Write 4KB QD=32, WCE/WCD (IOPS): 494/455, 565/565
• Error rate (non-recoverable bits read): 1 in 10
• Load/Unload cycles (at 40°C): 600,000
• Availability (hrs/day x days/wk): 24x7
• MTBF (M hours, projected): 2.5
• Annualized Failure Rate (AFR, projected): 0.35%
• Workloads: Up to 550 TB/year
• Dimensions (W x D x H): 101.6 x 147 x 26.1 mm
• Weight: 690 g