Seagate ST36421A, ST32112A, ST38421A, ST34311A manual Specification summary table

2 U4 Family Product Manual, Rev. D

Specification summary table

The specifications listed in this table are for quick reference. For details on specification measurement or definition, see the appropriate section of this manual.

Drive Specification	ST32112A	ST34311A		ST36421A	ST38421A
Guaranteed Mbytes
(×106 bytes)	2,160	4,320		6,448	8,440
Guaranteed sectors	4,225,536	8,452,080		12,596,850	16,498,944
Bytes per sector		512
Default sectors per track			63
Default read/write heads	16	15		15	16
Default cylinders	4,192	8,944		13,330	16,368
Physical read/write
heads	1	2		3	4
Discs	1	1		2	2
Recording density
BPI (bits/inch max)		241,000
Track density
TPI (tracks/inch)		13,100
Areal density
(Mbits/inch2 max)		3,179
Spindle speed (RPM)		5,400
Internal data-transfer
rate (Mbits/sec max)		206
I/O data-transfer rate
(Mbytes/sec max)		66.6
ATA data-transfer modes		PIO modes 0–4
supported		Multiword DMA modes 0–2
		Ultra DMA modes 0–4
Cache buffer (Kbytes)		256
Height (mm max)		26.1
Width (mm max)		102
Length (mm max)		147.0
Weight (typical)		580 grams (1.2 lb)