18 TB SAS LFF HDD Specification

Drive Specification

Table 1  Power Requirements

Condition +5 VDC (+/-5%) +12 VDC (+/-5%) Motor start (Surge current 20 sec) Amp. peak 0.90 A 1.90 A Idle power (Average) 0.41 A 0.32 A Maximum peak operational power 0.95 A 2.00 A  (9.7 W max workload)

Table 2  Physical Characteristics

Height Width Depth Weight 1.03 in. 4.00 +/-0.006 in. 5.787 +/-0.006 in. 24.339 +/-0.035 oz 26.1 mm 101.6 +/-0.25 mm 147 mm 0.690 +/-0.001 kg

• Note: The physical characteristics do not include the bracket.

Table 3  Usage Information

Usage Description Useful life 5 years Minimum Expected annualized failure rate (AFR) for normal 24/7 operating conditions 0.35% Operating temperature (Case) 0 to 50 degrees Celsius Note -  Derating of AFR applies above 40 degrees Celsius. Maximum temperature 60 degrees Celsius (maximum sustained temperature) Note -  Drive may be rendered unusable above 65 degrees Celsius. Other environmental factors Conforms to IEC standards

Table 4  Drive Capacity and Performance

Usage Description Capacity, formatted 17,634,061,975,552 bytes (520 bytes per sector) Rotational latency average 4.16 msec (7,200 rpm) Seek times (read/write) Typical Single track seek (typical) 0.25/0.35 msec Average seek 8.3 msec Maximum seek 10/11.3 msec Random 2 KB reads per sec Typical Queue=1, 100% Volume (RR) 85 IOPS Queue=32, 100% Volume (RR) 211 IOPS HDA data transfer rate Typical Sustained sequential read 253.5 MiB/s (OD) / 151 MiB/s (ID) Interface data transfer rate 12 Gbps/6 Gbps/3 Gbps/1.5 Gbps (auto negotiation, dual port, full duplex) SAS-3 Maximum instantaneous data transfer rate 1200 Mbytes per sec (12 Gbps mode) Power On to Ready 25 sec (typical) Spin down 30 sec (typical)