Toshiba’s drives are most widely represented in this roundup. The MK4018GAS HDD is a low-end model due to its speed (4,200rpm). The capacity of this drive is 40GB: two platters and four heads. The data density is 35.1Gbit per square inch. The cache-buffer size is 2MB and the average seek time is 12ms. The drive supports ATA-5 interface.
The motor of this HDD runs on fluid dynamic bearings.
This is another representative of the GAS family, differing from the previous one only by higher capacity. This one is 60GB big (four heads), but the data density is already 48.8Gbit/sq. inch. The remaining characteristics are the same.