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price	R 7,759.95	R 7,129.95	R 7,499.00	R 7,189.95	R 7,599.00	R 7,649.95	R 7,739.95	R 7,509.95	R 7,919.95	R 7,449.95	R 7,709.95	R 7,179.94
model	Ultrastar DC HC520 SATA / HUH721212ALE604	Skyhawk AI 14TB / ST14000VE0008	091K8T	Skyhawk AI 16TB / ST16000VE000	WD Red Pro NAS 10TB / WD102KFBX	Exos X18 16TB SAS / ST16000NM004J	Exos X18 18TB SATA SED / ST18000NM001J	Exos X18 18TB SAS / ST18000NM004J	IronWolf Pro 12TB / ST12000NE0008	Skyhawk AI 10TB / ST10000VE001	WD Red Plus 12TB / WD120EFBX	Exos X18 14TB SATA / ST14000NM000J
name	Ultrastar DC HC520 SATA 12TB Server Hard Drive (HUH721212ALE604)	Skyhawk AI 14TB 3.5" Desktop Surveillance Hard Drive (ST14000VE0008)	PowerVault MD1200 3TB 7.2K 3.5" Hot Swap SAS Server Hard Drive	Skyhawk AI 16TB 3.5" Desktop Surveillance Hard Drive (ST16000VE000)	WD Red Pro NAS 10TB 3.5" Hard Drive (WD102KFBX)	Exos X18 16TB 3.5" SAS Enterprise Internal Hard Drive (ST16000NM004J)	Exos X18 18TB 3.5" SATA SED Enterprise Internal Hard Drive (ST18000NM001J)	Exos X18 18TB 3.5" SAS Enterprise Internal Hard Drive (ST18000NM004J)	IronWolf Pro 12TB NAS Hard Drive (ST12000NE0008)	Skyhawk AI 10TB 3.5" Desktop Surveillance Hard Drive (ST10000VE001)	Red Plus 12TB NAS Hard Drive (WD120EFBX)	Exos X18 14TB 3.5" SATA Enterprise Internal Hard Drive (ST14000NM000J)
details	* 3.5-inch form factor * SATA 6 Gb/s * 7200RPM * 256MB data buffer, 512e format * 2.5M hours MTBF rating and a 5-year limited warranty	* ImagePerfect AI firmware * Custom designed to support an additional 32 AI streams * Designed and built to handle heavy surveillance workloads * Advanced vibration management * SkyHawk Health Management * Improved reliability * Unparalleled data protection * 256MB Cache	* SAS 6Gb/s * 7200RPM * MTBF of 1.2 million hours	* ImagePerfect AI firmware * Custom designed to support an additional 32 AI streams * Designed and built to handle heavy surveillance workloads * Advanced vibration management * SkyHawk Health Management * Improved reliability * Unparalleled data protection * 256MB Cache * 2,000,000 hr MTBF	* SATA3, 3.5" form factor * 7200rpm * 256MB Cache * for NAS systems with up to 24-bays * 265MB/s Internal Transfer Rate * NASWare 3.0 Technology * multi-axis shock protection	* 12 Gb/s SAS * 7200 RPM * 512e/4Kn Sector Size (Bytes per Sector) * Cache, Multi-segmented (MB): 256 MB * Max. Sustained Transfer Rate OD (MB/s, MiB/s): 270/258 * Dual Interface Ports * MTBF: 2,500,000 * Power-On Hours per Year (24×7): 8,760	* SATA 6 Gb/s * 7200 RPM * 512e/4Kn Sector Size (Bytes per Sector) * Cache, Multi-segmented (MB): 256 MB * Max. Sustained Transfer Rate OD (MB/s, MiB/s): 270/258 * Single Interface Ports * MTBF: 2,500,000 * Power-On Hours per Year (24×7): 8,760	* 12 Gb/s SAS * 7200 RPM * 512e/4Kn Sector Size (Bytes per Sector) * Cache, Multi-segmented (MB): 256 MB * Max. Sustained Transfer Rate OD (MB/s, MiB/s): 270/258 * Dual Interface Ports * MTBF: 2,500,000 * Power-On Hours per Year (24×7): 8,760	* Designed for multi-bay NAS systems with Power balance + AcuTrac Technology * Up to 24-bay * Sata 6Gb/s * 7200rpm * 256mb Cache * 1.2 M Mean Time Between Failures (MTBF) (hours)	* 3.5" Form Factor * SATA III 6 Gb/s Interface * 7200RPM * 256MB Cache Buffer * Sustained data transfer rate OD (MiB/s max): 234 (245MB/s max) * 2 Million Hours MTBF * 300,000 Load/Unload Cycles * Designed for 24/7 Surveillance	* 3.5" Form Factor * SATA III 6 Gb/s Interface * 7200RPM * 256MB Cache * Up to 196 MB/s Sustained Transfer Rate * CMR Recording Technology, Native command queuing, Advanced Format (AF), RoHS compliant * 1 Million Hours MTBF * Built and tested for up to 8-bay NAS systems * Supports up to 180 TB/yr workload rate * Small or medium business NAS systems in a 24x7 environment	* SATA 6 Gb/s * 7200 RPM * 512e/4Kn Sector Size (Bytes per Sector) * Cache, Multi-segmented (MB): 256 MB * Max. Sustained Transfer Rate OD (MB/s, MiB/s): 270/258 * Single Interface Ports * MTBF: 2,500,000 * Power-On Hours per Year (24×7): 8,760
warranty	5 years	3 years	1 year	3 years	5 years	5 years	5 years	5 years	5 years	3 years	3 years	5 years
General
Model	Ultrastar DC HC520 SATA	Skyhawk AI 14TB	091K8T	Skyhawk AI 16TB	WD Red Pro NAS 10TB	Exos X18 16TB SAS	Exos X18 18TB SATA SED	Exos X18 18TB SAS	IronWolf Pro 12TB	Skyhawk AI 10TB	WD Red Plus 12TB	Exos X18 14TB SATA
Product Line	Ultrastar DC HC500 Series	Skyhawk AI		Skyhawk AI	WD Red Pro NAS	Exos X18	Exos X18	Exos X18	IronWolf Pro	Skyhawk AI	WD Red Plus	Exos X18
Drive Type	Server	Surveillance	Server	Surveillance	NAS	Server	Desktop	Server	NAS	Surveillance	NAS	Desktop
SSHD	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>
Form Factor	3.5 inch	3.5 inch	3.5 inch	3.5 inch	3.5 inch	3.5 inch	3.5 inch	3.5 inch	3.5 inch	3.5 inch	3.5 inch	3.5 inch
Capacity	12 TB	14 TB	3 TB	8 TB	10 TB	16 TB	16 TB	18 TB	12 TB	10 TB	12 TB	14 TB
Interface	SATA3	SATA3	SAS	SATA3	SATA3	SAS	SATA3	SAS	SATA3	SATA3	SATA3	SATA3
Drive Format	4Kn 512e	<not specified>	<not specified>	<not specified>	<not specified>	512e 4Kn	4Kn 512e	512e 4Kn	<not specified>	512e	<not specified>	4Kn 512e
Self Encrypting Drive (SED)	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>
Certification	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>
Performance
Rotational Speed	7200 rpm	7200 rpm	7200 rpm	7200 rpm	7200 rpm	7200 rpm	7200 rpm	7200 rpm	7200 rpm	7200 rpm	7200 rpm	7200 rpm
Cache Size	256 MB	256 MB	64 MB	256 MB	256 MB	256 MB	256 MB	256 MB	256 MB	256 MB	256 MB	256 MB
Average Latency	4.16 msec	<not specified>	4.16 msec	<not specified>	<not specified>	4.16 msec	4.16 msec	4.16 msec	4.16 msec	4.16 msec	<not specified>	4.16 msec
Data Rate	600 MB/s	235 MB/s	600 MB/s	250 MB/s	265 MB/s	270 MB/s	270 MB/s	270 MB/s	250 MB/s	245 MB/s	196 MB/s	270 MB/s
Random read seek time	8.0 msec	<not specified>	8.3 msec	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>
Random write seek time	<not specified>	<not specified>	9.5 msec	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>
Thickness	26 mm	<not specified>	<not specified>	<not specified>	<not specified>	26.1 mm	26.1 mm	26.1 mm	26.1 mm	<not specified>	26.1 mm	26.1 mm
Optional Accessories
Rescue Plan	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>	<not specified>