Seagate ST373207LW/LC, ST3146707LW/LC, ST3300007LW/LC manual General description

3.0General description

Cheetah 10K.7 SCSI drives combine giant magnetoresistive (GMR) heads, partial response/maximum likeli- hood (PRML) read channel electronics, embedded servo technology, and a wide Ultra320 SCSI interface to provide high performance, high ] data storage for a variety of systems including engineering workstations, net- work servers, mainframes, and supercomputers.

Ultra320 SCSI uses negotiated transfer rates. These transfer rates will occur only if your host adapter supports these data transfer rates and is compatible with the required hardware requirements of the I/O circuit type. This drive also operates at SCSI-1 and SCSI-2 data transfer rates for backward compatibility with non-Ultra/Ultra2/ Ultra320 SCSI host adapters.

Table 1 lists the features that differentiate the Cheetah 10K.7 SCSI models.

Table 1:	Drive model number vs. differentiating features
		Number of active		Number of I/O
Model number		heads	I/O circuit type [1]	connector pins
ST3300007LW		8
ST3146707LW		4	Single-ended (SE) and low voltage differential (LVD)	68
ST373207LW		2
ST3300007LC		8
ST3146707LC		4	Single-ended (SE) and low voltage differential (LVD)	80
ST373207LC		2

[1]See Section 9.6 for details and definitions.

The drive records and recovers data on approximately 84 mm non-removable discs.

The drive supports the Small Computer System Interface (SCSI) as described in the ANSI SCSI interface specifications to the extent described in this manual (volume 1), which defines the product performance char- acteristics of the Cheetah 10K.7 SCSI family of drives, and the SCSI Interface Product Manual (volume 2), part number 75789509, which describes the general interface characteristics of this and other families of Seagate SCSI drives.

The drive’s interface supports multiple initiators, disconnect/reconnect, self-configuring host software, and log- ical block addressing.

The head and disc assembly (HDA) is sealed at the factory. Air circulates within the HDA through a non- replaceable filter to maintain a contamination-free HDA environment.

Never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actu- ator, etc.) as this requires special facilities. The drive contains no replaceable parts. Opening the HDA voids your warranty.

Cheetah 10K.7 SCSI Product Manual, Rev. D 7