Slowly but surely, hard drives with 4 KB sectors are replacing the "legacy" 512 byte sector size. By January 2011, all drive vendors will have made this transition. Buyers of new PCs are safe, but there are still a few performance pitfalls to note.
On this page and the next we’ll only be comparing the 750 GB sector aligned drive to a misaligned setup to look at just this difference. All other results will compare the newer, 750 GB 4 KB sector drive to the older 640 GB 512 byte drive.
As you can see, the unaligned setup results in a performance impact of up to 50%, depending on the workload. Workloads that do not involve write operations, such as the Web server test pattern, don’t show any disadvantage at all in I/O testing.
- ‘Advanced Format’ Will Be Standard By 2011
- 512 Byte Emulation: Issues
- 512 Byte Sectors: Toshiba MK6465GSX (640 GB)
- 4 KB Sectors: Toshiba MK7559GSXP (750 GB)
- Test Setup And Transfer Diagrams
- Misaligned Sector Results: I/O Performance
- Misaligned Sector Results: Streaming Reads/Writes
- Benchmark Results: Access Time And I/O Performance
- Benchmark Results: Throughput And Interface Bandwidth
- Benchmark Results: PCMark Vantage
- Benchmark Results: Power Consumption And Efficiency
- Analysis And Conclusion