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Seagate ST3146707LW/LC manual Scsi interface cable requirements, Cable requirements, LC Models

Models: ST3300007LW/LC ST373207LW/LC ST3146707LW/LC

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Table 13: Interface transfer rates supported

 

 

Maximum transfer rate

 

 

 

 

 

Interface type/

 

 

 

 

 

 

 

 

 

 

Fast-20

Fast-40

Fast-80

Fast-160

drive models

Asynchronous

Fast-5

Fast-10

(Ultra)

(Ultra2)

(Ultra160)

(Ultra320)

 

 

 

 

 

 

 

 

 

SE

ST3300007LW/LC

yes

yes

yes

yes

no

no

no

 

ST3146707LW/LC

 

 

 

 

 

 

 

 

ST373207LW/LC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LVD

ST3300007LW/LC

yes

yes

yes

yes

yes

yes

yes

 

ST3146707LW/LC

 

 

 

 

 

 

 

 

ST373207LW/LC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9.6.3SCSI interface cable requirements

The characteristics of cables used to connect parallel interface drives are discussed in the ANSI standards ref- erenced in this section.

9.6.3.1Cable requirements

The characteristics of cables used to connect Ultra320 SCSI parallel interface devices are discussed in detail in Section 6 of ANSI Standard T10/1365D Rev. 3. The cable characteristics that must be considered when interconnecting the drives described in this manual in a Ultra320 SCSI parallel, daisy-chain interconnected system are:

•characteristic impedance (see T10/1365D Sections 6.3.3 and 6.3.4)

•propagation delay (see T10/1365D Sections 6.3.6 and 6.3.7)

•stub length (see T10/1365D Section 6.9)

•device spacing (see T10/1365D Section 6.9)

To minimize discontinuances and signal reflections, cables of different impedances should not be used in the same bus. Implementations may require trade-offs in shielding effectiveness, cable length, number of loads and spacing, transfer rates, and cost to achieve satisfactory system operation. If shielded and unshielded cables are mixed within the same SCSI bus, the effect of impedance mismatch must be carefully considered. Proper impedance matching is especially important in order to maintain adequate margin at FAST-20, FAST- 40, FAST-80, and FAST-160 SCSI transfer rates.

Note. For LVD operation, twisted pair cables are recommended. For LVD Fast-40 operation, twisted pair cables are strongly recommended. For Fast-80 and Fast-160 operation, twisted pair cables are required.

LC Models

The 80-pin connector option provided on LC models is intended for use on drives that plug directly into back- plane connector in the host equipment. In such installations, all backplane wiring segments are subject to the electromagnetic concepts presented in Standard T10/1365D, Rev. 3, Section 6. For LC model drives, installa- tions with connectors on cables are not recommended.

9.6.4Mating connectors

Part numbers for the different type connectors that mate with the various Cheetah 10K.7 SCSI I/O connectors are given in the sections following.

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

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Seagate ST3146707LW/LC, ST3300007LW/LC Scsi interface cable requirements, Cable requirements, LC Models, Mating connectors
Page 77 Page 79

ST3300007LW/LC, ST373207LW/LC, ST3146707LW/LC specifications

Seagate's ST3146707LW/LC, ST373207LW/LC, and ST3300007LW/LC are part of the company's renowned line of hard disk drives (HDDs), specifically designed for enterprise and high-performance computing environments. With their reliability and performance, these drives have become popular choices for data centers and critical applications requiring extensive storage capabilities.

One of the standout features of these models is their capacity to handle large volumes of data. The ST3146707LW/LC has a capacity of 146GB, while the ST373207LW/LC offers 73GB, and the ST3300007LW/LC comes with a substantial 300GB. These capacities make them well-suited for applications that require not only high storage space but also rapid access to data.

In terms of performance, these drives utilize a 10,000 RPM spindle speed, which significantly enhances data access times and overall performance. The combination of fast rotational speeds with Seagate's advanced caching algorithms allows for swift data retrieval, making these drives ideal for environments where speed is crucial.

These HDDs also employ the SCSI (Small Computer System Interface) interface, which promises high data transfer rates and reliability in enterprise-level applications. The Ultra320 SCSI interface can support transfer rates up to 320 MB/s, ensuring that the drives can efficiently communicate with other system components.

Another key technology featured in these models is Seagate's Adaptive Error Correction technology, which enhances data integrity and reliability. This feature helps in the detection and correction of errors that can occur during data transfer, reducing the risk of data loss.

Performance consistency is critical in enterprise environments, and these drives are built to endure the demands of 24/7 operation. They are designed with robust mechanisms to withstand temperature fluctuations, shock, and vibrations commonly found in data center settings.

In summary, the Seagate ST3146707LW/LC, ST373207LW/LC, and ST3300007LW/LC hard drives exemplify advanced features and technologies tailored for enterprise storage solutions. With significant capacities, impressive spindle speeds, SCSI connectivity, and reliability-focused technologies, these drives remain a valuable asset for businesses relying on stable and high-performance data storage.