Delivering maximum storage capacity with the highest rack-space efficiency.

Scalable. Responsive. Innovative

Powerful performance with proven technology—Seagate’s ® Exos® X24 drives are built off the platform that’s shipped millions globally and deployed in leading cloud service provider solutions—making them the most sought-after drives in our datasphere. Designed with the highest rack-space efficiency and protected with Seagate Secure™, Exos X24 offers extreme market-leading capacity, earning customer confidence by delivering trusted peace of mind.

Superior Reliability

Enterprise-class drives with a 550 TB/year workload rating and 2.5M-hr MTBF to meet the most demanding storage requirements.

Customisation Power Options

PowerChoice™ and PowerBalance™ for optimised power consumption when in use and idle — customisable to fit your needs.

Amazing Performance

Advanced write caching coupled with up to 285 MB/s data transfer rates provides a boost in performance without compromising on capacity.

Advanced Data Security

Seagate Instant Secure Erase for safe, affordable, fast and easy drive retirement.

Specifications

Hard drive
Component for	PC
HDD sustained transfer rate	272 MiB/s
HDD interface transfer rate	12 Gbit/s
HDD average transfer rate	285 MB/s
Average latency	4.16 ms
Mean time between failures (MTBF)	2500000 h
HDD speed	7200 RPM
HDD size	3.5"
HDD capacity	20 TB
Features
Type	HDD
Component for	PC
HDD sustained transfer rate	272 MiB/s
HDD interface transfer rate	12 Gbit/s
HDD average transfer rate	285 MB/s
Interface	SAS
Average latency	4.16 ms
Mean time between failures (MTBF)	2500000 h
HDD speed	7200 RPM
HDD size	3.5"
HDD capacity	20 TB
Storage drive buffer size	512 MB
Uncorrectable Bit Error Rate (UBER)	< 1 per 10^15 bits read
Rotational Vibration (RV) sensors	Yes
Power
Power consumption (write)	8.2 W
Power consumption (read)	9.8 W
Power consumption (idle)	6.5 W
Operational conditions
Operating temperature (T-T)	10 - 60 °C
Operating vibration	2.27 G
Operating shock	40 G
Non-operating shock	200 G

Technical details
Quantity per pack	1 pc(s)
Interface	SAS
Mean time between failures (MTBF)	2500000 h
Weight & dimensions
Width	101.8 mm
Weight	685 g
Height	26.1 mm
Depth	147 mm
Packaging data
Quantity per pack	1 pc(s)
Other features
Interface	SAS

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SKU	ST20000NM007H	872481-B21	870753-B21	881457-B21	WD181KRYZ	ST18000NM004J
Manufacturer	SEAGATE	HPE	HPE	HPE	WESTERN DIGITAL	SEAGATE
HDD capacity	over 2.5 TB	≈ 1.5 TB	≈ 300 GB	≈ 2 TB	over 2.5 TB	over 2.5 TB
Interface	SAS	N/A	N/A	N/A	Serial ATA	SAS
Type	HDD	N/A	N/A	N/A	HDD	HDD
HDD speed	7200RPM to 10000RPM	10000RPM to 15000RPM	15000RPM and more	10000RPM to 15000RPM	7200RPM to 10000RPM	7200RPM to 10000RPM
HDD size	3.5 "	2.5 "	2.5 "	2.5 "	3.5 "	3.5 "
Component for	PC	Server/workstation	Server/workstation	Server/workstation	PC	Disk array