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4.0General description
Cheetah 15K.5 SCSI drives combine Tunneling Magnetoresistive (TMR) heads and a wide Ultra320 SCSI interface to provide high performance, high capacity data storage for a variety of systems including engineer- ing workstations, network 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
Table 1 lists the features that differentiate the Cheetah 15K.5 SCSI models.
Table 1: | Drive model number vs. differentiating features |
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| Number of |
| Number of I/O |
Model number | active heads | I/O circuit type [1] | connector pins | |
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ST3300655LW | 8 | 68 | ||
ST3146855LW | 4 | differential (LVD) |
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ST373455LW | 2 |
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ST3300655LC | 8 | 80 | ||
ST3146855LC | 4 | differential (LVD) |
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ST373455LC | 2 |
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[1]See Section 10.6 for details and definitions.
The drive records and recovers data on approximately 70 mm
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 15K.5 SCSI family of drives, the Parallel SCSI Interface Manual, part number 100293069, and the SCSI Commands Reference Manual, part number 100293068, which describe the gen- eral interface characteristics of this and other families of Seagate SCSI drives.
The drive’s interface supports multiple initiators, disconnect/reconnect,
The head and disc assembly (HDA) is sealed at the factory. Air circulates within the HDA through a non- replaceable filter to maintain a
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 15K.5 SCSI drives use a dedicated landing zone at the innermost radius of the media to eliminate the possibility of destroying or degrading data by landing in the data zone. The drive automatically goes to the landing zone when power is removed.
6 | Cheetah 15K.5 SCSI Product Manual, Rev. J |