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Western Digital Ultrastar 18TB SATA3

Hard Drive

Western Digital Ultrastar 18TB SATA3 Picture 63342

Background on Hard Disk Drives

Traditional hard drives operate by storing data on one or more spinning metal disks, called platters. The more platters there are in a drive, and the more data that can be crammed onto each platter, is what determines the overall storage capacity of a given hard drive. Having more platters also tends to mean louder drives, though rotational speed affects that as well. Rotational speed also impacts the drive's performance: if platters spin faster the drive can reach data in different areas more quickly and read or write more information per second.

The alternative to hard drives is solid state drives, which are many times faster but much more expensive for the same amount of capacity. The price gap is dropping over time, so SSDs are becoming more and more preferred for us. For performance, reliability, and noise reduction, SSDs are really the way to go.

WD Ultrastar drives are oriented toward data center use, with a focus on both performance and reliability. They use the SATA 6Gbps interconnect and spin at 7200rpm, and this 18TB model has more cache (512 MB) than some of the smaller sizes. Reliability is ensured with dual actuator head positioning, RAFF for vibration protection, and TLER to help avoid drives dropping out of arrays (RAID). Even though they are aimed at data centers and other enterprise applications, the features these drives have make them excellent options for users who need high capacity, reliability, and performance.
Model: Western Digital WUH721818ALE6L4

Capacity  18,000 GB
Rotation Speed  7200 RPM
Interface  SATA 6 Gb/s
Cache Size  512 MB
Form Factor  3.5 Inch
Average Seek Time  4.16 ms
Idle Noise  20 dB
Seek Noise  36 dB
Peak Power Draw  6.5 Watts
Large Drive Mounting  Yes
Net Weight  0.741 kg (1.6 lbs)
Sequential Read  269 MB/s
Sequential Write  257 MB/s

Configure a custom computer with the Western Digital Ultrastar 18TB SATA3.