Seagate ST34520N - Medalist 4.55 GB Hard Drive, Руководство по эксплуатации продукта

Страница: 15 / 102

Medalist Pro Product Manual, Rev. D 5
3.0 General description
Medalist Pro drives combine magnetoresistive (MR) heads, partial response/maximum likelihood (PRML) read
channel electronics, embedded servo technology, and a SCSI-3 (Fast-20 and Fast-40) interface to provide high
performance, high capacity data storage for a variety of systems including high-end desktop systems, worksta-
tions, and entry level servers.
Fast-20 and Fast-40 (also known as Ultra SCSI and Ultra-2 SCSI) are negotiated transfer rates. These transfer
rates will occur only if your host adapter also supports Fast-20 and Fast-40 data transfer rates. This drive also
operates at SCSI-2/SCSI-3 data transfer rates for backward compatibility with non-Fast-20/Fast-40 capable
SCSI host adapters.
Table 1 lists the features that differentiate the various Medalist Pro SCSI-3 Fast-20 and Fast-40 models.
Table 1: Drive model number vs. I/O features
Note.
[1] See Section 9.7.2, “Multimode—SE or LVD alternative.”
The drive records and recovers data on 3.5-inch (86 mm) non-removeable discs.
The drive supports the Small Computer System Interface (SCSI) as described in the ANSI SCSI-2 and SCSI-3
interface specifications to the extent described in this manual (volume 1), which defines the product perfor-
mance characteristics of the Medalist Pro family of drives, and the
SCSI Interface Product Manual (volume 2),
part number 77738479, which describes the general interface characteristics of this and other families of
Seagate SCSI drives.
The drive’s interface supports multiple initiators, disconnect/reconnect, and automatic features that relieve the
host from the necessity of knowing the physical characteristics of the targets (logical block addressing is used).
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.
Refer to Figure 2 for an exploded view of the drive. This exploded view is for information only—never disassem-
ble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this
requires special facilities. The drive contains no replaceable parts. Opening the HDA voids your warranty.
Model number
Number
of heads
I/O circuit type
Number of I/O
connector pins Number of I/O
data bus bits
ST39140N 8 single-ended 50 8
ST39140W 8 single-ended 68 16
ST39140LW 8 multimode (SE/LVD) [1] 68 16
ST39140WC 8 single-ended 80 16
ST39140LC 8 multimode (SE/LVD) [1] 80 16
ST36530N 8 single-ended 50 8
ST36530W 8 single ended 68 16
ST36530WC 8 single-ended 80 16
ST34520N 8 single-ended 50 8
ST34520W 8 single-ended 68 16
ST34520LW 8 multimode (SE/LVD) [1] 68 16
ST34520WC 8 single-ended 80 16
ST34520LC 8 multimode (SE/LVD) [1] 80 16