Western Digital
Western Digital Ultrastar DC HC550 18TB 7200RPM SAS 12Gb/s 512MB Cache 3.5-inch internal hard drive
High-capacity 3.5-inch drive holds 18 TB with 7200 RPM speed and 512 MB cache over SAS 12 Gb/s
- Massive 18TB capacity stores vast datasets
- 7200RPM spindle delivers consistent throughput
- 12Gb/s SAS interface enables fast data transfer
- 512MB cache accelerates frequent read operations
Ultrastar DC HC550 18TB enterprise drive
The Western Digital Ultrastar DC HC550 is an 18TB 3.5-inch internal hard drive built for data-centre workloads. It spins at 7200RPM and uses a SAS 12Gb/s interface with a 512MB cache to handle sustained read and write demands.
SAS 12Gb/s interface practical limits
The SAS 12Gb/s link tops out at 12Gb/s, so throughput cannot exceed that ceiling regardless of drive speed. Workloads needing higher bandwidth or lower latency than SAS provides will require a different interface.
Highlights
- Massive 18TB capacity stores vast datasets
- 7200RPM spindle delivers consistent throughput
- 12Gb/s SAS interface enables fast data transfer
- 512MB cache accelerates frequent read operations
Specifications
No published specifications for this item yet.
Questions about this item
Should I choose the 18TB model or a smaller capacity for my storage array?
The 18TB capacity suits high-density arrays where rack space is limited; pick a smaller drive only if your workload does not need that much raw space.
What does the 7200RPM speed mean for daily throughput on a SAS 12Gb/s link?
7200RPM delivers sustained sequential rates that saturate the SAS 12Gb/s bus during large transfers, while random I/O depends on queue depth and the 512MB cache.
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