Seagate ST34321A Product Manual - Page 15

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 7 Spindle speed RPM ( ± 0.2%) Internal data-transfer rate (Mbits per second max) I/O data-transfer rate (Mbytes per second max) Interleave Cache buffer (Kbytes) 5,400 140 16.6 (PIO mode 4 with IORDY) 16.6 (multiword DMA mode 2) 33.3 (Ultra DMA mode 2) 1:1 128 1.4 Physical characteristics Drive Specification ST38641A ST34321A ST36531A ST33221A ST32110A Maximum height (mm) (inches) 26.10 1.028 Maximum width (mm) (inches) 101.85 4.010 Maximum length (mm) (inches) 147.00 5.787 Typical weight (grams) 544 (pounds) 1.2 1.5 Seek time All seek times are measured using a 486 AT computer (or faster) with an 8.3 MHz I/O bus. The measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The specifications in the table on page 8 are defined as follows: • Track-to-track seek time is an average of all possible single-track seeks in both directions. • Average seek time is a true statistical random average of at least 5,000 measurements of seeks between random tracks, less overhead. • Full-stroke seek time is one-half the time needed to seek from the first data cylinder to the maximum data cylinder and back to the first data cylinder. The full-stroke typical value is determined by averaging 100 full-stroke seeks in both directions.