3 ms·
I've noticed that myself, that capacity increased much faster than throughput. It would be interesting to see this graphed over time.
by causi 5y ago
I've noticed that myself, that capacity increased much faster than throughput. It would be interesting to see this graphed over time.
- HPsquared 5y agoThe number of tracks per platter increased, but the RPM didn't. Assuming the heads can only read one track at a time per platter, it will take (number of tracks per platter / rpm) minutes to read the whole disk. Therefore it will take longer to read the whole disk. QED
- bcrl 5y agoDrives don't read from multiple platters in parallel, so it's actually num_tracks * num_platters * 2 / rpm to read in the best case. Real world is more than that since it takes time for the drive firmware to shift between different platters and tracks. *edit: not entirely true: the Seagate MACH.2 drive series that has 2 separate head assemblies per drive. They're pretty expensive and hard to get ahold of.