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4-4 Maxtor D540X-4K 20.4/40.0/60.0/80.0 GB AT
At the factory, the Maxtor D540X-4K 20.4/40.0/60.0/80.0 GB AT hard disk drives
receive a low-level format that creates the actual tracks and sectors on the drive. Table
4-2 shows the capacity resulting from this process. Formatting done at the user level,
for operation with DOS, UNIX, or other operating systems, may result in less capacity
than the physical capacity shown in Table 4-2.
Formatted Capacity
Data is transferred from the disk to the read buffer at a rate of up to 283.20 Mb/s
in bursts. Data is transferred from the read buffer to the ATA bus at a rate of up to
16.7 MB/s using programmed I/O with IORDY, or at a rate of up to 66 MB/s
using Ultra ATA/100. For more detailed information on interface timing, refer to
Chapter 6.
Capacity 20.41 GB 40.03 GB 60.04 GB 80.02 GB
Number of 512-
byte sectors avail-
able
39,876,480 78,198,750 117,266,688 156,301,488