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 Western Digital (36)
 
 Dell (3)
 
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Intended Use
 
 Desktop (21)
 
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 NAS (29)
 
 Surveillance (22)
 
 Server (13)
 
Interface
 
 SATA3 (91)
 
 SAS-2 (6)
 
Capacity
 
 500 GB (6)
 
 1 TB (16)
 
 2 TB (13)
 
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Rotational Speed
 
 5400 RPM (28)
 
 7200 RPM (58)
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Internal Hard Drives   
                       
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price R 6,689.95 R 7,759.95 R 10,389.95 R 3,929.95 R 5,799.94 R 3,799.95 R 4,319.95 R 7,599.00 R 9,399.95 R 11,979.95 R 5,399.00 R 1,999.95
model Ultrastar DC HC510 SATA / HUH721010ALE604 Ultrastar DC HC520 SATA / HUH721212ALE604 Ultrastar DC HC530 SATA / WUH721414ALE6L4 WD Black 3.5" 4TB / WD4005FZBX WD Black 3.5" 6TB / WD6003FZBX WD Red NAS 6TB / WD60EFAX WD Purple 8TB / WD82PURZ WD Red Pro NAS 10TB / WD102KFBX WD Red Pro NAS 12TB / WD121KFBX WD Red Pro NAS 14TB / WD141KFGX Ultrastar DC HC320 SATA / HUS728T8TALE6L4 WD Red NAS 2TB / WD20EFAX
name Ultrastar DC HC510 SATA 10TB Server Hard Drive (HUH721010ALE604) Ultrastar DC HC520 SATA 12TB Server Hard Drive (HUH721212ALE604) Ultrastar DC HC530 SATA 14TB Server Hard Drive (WUH721414ALE6L4) WD Black 3.5" 4TB Desktop Hard Drive (WD4005FZBX) WD Black 3.5" 6TB Desktop Hard Drive (WD6003FZBX) WD Red 6TB NAS Hard Drive (WD60EFAX) WD Purple 8TB 3.5" Surveillance Hard Drive (WD82PURZ) WD Red Pro NAS 10TB 3.5" Hard Drive (WD102KFBX) WD Red Pro NAS 12TB 3.5" Hard Drive (WD121KFBX) WD Red Pro NAS 14TB 3.5" Hard Drive (WD141KFGX) Ultrastar DC HC320 8TB Server Hard Drive (HUS728T8TALE6L4) WD Red 2TB NAS Hard Drive (WD20EFAX)
details * 3.5-inch form factor * SATA 6 Gb/s * 7200RPM * 256MB data buffer, 512e format * Interface Transfer Rate: 600MB/s * Sustained transfer rate: 249 / 225 (MB/s, typical) * 2.5M hours MTBF rating and a 5-year limited warranty * 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 * 3.5-inch form factor * SATA 6 Gb/s * 7200RPM * 256MB data buffer, 512e format * Interface Transfer Rate: 600MB/s * Sustained transfer rate: 255 / 267 (MB/s, typical) * 2.5M hours MTBF rating and a 5-year limited warranty * For use in Gaming PCs, Multimedia & Workstation * 7200rpm * 256 MB/s Host to/from Drive (Sustained Transfer Rate) * 256 Cache * NoTouch Ramp Load Technology * For use in Gaming PCs, Multimedia & Workstation * 7200rpm * 227MB/s Host to/from (Sustained) * 256MB Dynamic Cache * NoTouch Ramp Load Technology * SATA3, 3.5" form factor * 5400rpm * 256MB Cache * for NAS systems with 1 to 8 drive bays * 180MB/s Internal Transfer Rate * NASWare 3.0 Technology * 3D Active Balance Plus * SATA3 * 7200rpm * 256 MB Cache * 245 MB/s Host to/from Drive (Sustained Transfer Rate) * Up to 64 Cameras Supported * 16+ Drive Bays Supported * 32 Al Streams * Firmware Feature Name: AllFrame AI * MTBF: 1,500,000 * 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 * SATA3, 3.5" form factor * 7200rpm * 256MB Cache * for NAS systems with up to 24-bays * 240MB/s Internal Transfer Rate * NASWare 3.0 Technology * multi-axis shock protection * SATA3, 3.5" form factor * 7200rpm * 512MB Cache * for NAS systems with up to 24-bays * 255MB/s Internal Transfer Rate * NASWare 3.0 Technology * multi-axis shock protection * SATA 6 Gb/s * Advanced Format 4Kn and 512e * 256MB Data buffer * 7200RPM * Transfer rate 600MB/s * 2M-hour MTBF * Workloads up to 550TB per year, and a 5-year limited warranty * SATA3, 3.5" form factor * 5400rpm * 256MB Cache * for NAS systems with 1 to 8 drive bays * 180MB/s Internal Transfer Rate * NASWare 3.0 Technology * 3D Active Balance Plus
warranty 5 years 5 years 5 years 5 years 5 years 3 years 3 years 5 years 5 years 5 years 5 years 3 years
General
Model
Ultrastar DC HC510 SATA
Ultrastar DC HC520 SATA
Ultrastar DC HC530 SATA
WD Black 3.5" 4TB
WD Black 3.5" 6TB
WD Red NAS 6TB
WD Purple 8TB
WD Red Pro NAS 10TB
WD Red Pro NAS 12TB
WD Red Pro NAS 14TB
Ultrastar DC HC320 SATA
WD Red NAS 2TB
Product Line
Ultrastar DC HC500 Series
Ultrastar DC HC500 Series
Ultrastar DC HC500 Series
WD Black 3.5"
WD Black 3.5"
WD Red NAS
WD Purple
WD Red Pro NAS
WD Red Pro NAS
WD Red Pro NAS
Ultrastar DC HC300 Series
WD Red NAS
Drive Type
Server
Server
Server
Desktop
Desktop
NAS
Surveillance
NAS
NAS
NAS
Server
NAS
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
10 TB
12 TB
14 TB
4 TB
6 TB
6 TB
8 TB
10 TB
12 TB
14 TB
8 TB
2 TB
Interface
SATA3
SATA3
SATA3
SATA3
SATA3
SATA3
SATA3
SATA3
SATA3
SATA3
SATA3
SATA3
Drive Format
4Kn
512e
4Kn
512e
512e
4Kn
 <not specified> <not specified> <not specified> <not specified> <not specified> <not specified> <not specified>
512n
4Kn
 <not specified>
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
5400 rpm
7200 rpm
7200 rpm
7200 rpm
7200 rpm
7200 rpm
5400 rpm
Cache Size
256 MB
256 MB
256 MB
256 MB
256 MB
256 MB
256 MB
256 MB
256 MB
512 MB
256 MB
256 MB
Average Latency
4.16 msec
4.16 msec
4.16 msec
 <not specified> <not specified> <not specified> <not specified> <not specified> <not specified> <not specified>
4.16 msec
 <not specified>
Data Rate <not specified>
600 MB/s
600 MB/s
256 MB/s
227 MB/s
180 MB/s
245 MB/s
265 MB/s
240 MB/s
255 MB/s
600 MB/s
180 MB/s
Random read seek time
7.5 msec
8.0 msec
7.5 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> <not specified> <not specified> <not specified> <not specified> <not specified> <not specified> <not specified> <not specified> <not specified> <not specified>
Thickness
26 mm
26 mm
26 mm
26.1 mm
26.1 mm
26.1 mm
26.1 mm
 <not specified> <not specified> <not specified>
26.1 mm
 <not specified>
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>