Hardware Reference
In-Depth Information
Another effect of zoned recording is that transfer speeds vary depending on which zone
the heads are in. A drive with zoned recording still spins at a constant speed. Because
moresectorsexistpertrackintheouterzones,however,datatransferisfastestthere.Con-
sequently, data transfer is slowest when reading or writing to the inner zones. That is why
virtually all drives today report minimum and maximum sustained transfer rates, which
depend on where on the drive you are reading from or writing to.
5K500.B21/2-inchlaptopdrive,thesectorspertrackforeachzone,andtheresultingdata
transfer rate.
Table 9.8 Zoned Recording Information for a Hitachi Travelstar 5K500.B 2 1/2-inch HDD
