Terminator requirements Terminator power

Table 20: Example Twist-n-flat cables - into a multi-drive backplane

		Single-	Single-		Conductor	Maximum twist-n-flat
		Single-	Single-		Conductor	cable length
	Differential	ended	ended	Time	DC	cable length
	Differential	ended	ended	Time	DC
Cable	impedance,	impedance,	capacitance,	delay,	resistance,	U320	U160
description	nominal	nominal	maximum	nominal	nominal	transfer rate	transfer rate

TPE, 22.25” twist,	131 ohms	93 ohms	15.3 pF/ft	1.45 ns/ft	0.105	3.05 meters	6.1 meters
1.75” flat, (24” flat					ohms/ft	(10.0 ft)	(20.0 ft)
to flat), 30 AWG
solid tinned copper

TPE, 8.1” twist,	131 ohms	93 ohms	15.3 pF/ft	1.45 ns/ft	0.105	2.45 meters	4.9 meters
1.75” flat, (9.85” flat					ohms/ft	(8.33 ft)	(16.66 ft)
to flat), 30 AWG
solid tinned copper

TPE, 4.25” twist,	131 ohms	93 ohms	15.3 pF/ft	1.45 ns/ft	0.105	1.52 meters	3.04 meters
1.75” flat, (6” flat to					ohms/ft	(5.0 ft)	(10.0 ft)
flat), 30 AWG solid
tinned copper

9.8Terminator requirements

Caution: These drives do not have onboard internal terminators. The user, systems integrator or host equip- ment manufacturer must provide a terminator arrangement external to the drive when termination is required. For LW drives, terminator modules can be purchased that plug between the SCSI I/O cable and the drive I/O connector or on the end of a short I/O cable stub extending past the last cable connector. LC drives are designed to be plugged into a backpanel connector without cabling.

9.9Terminator power

LW drives

You can configure terminator power from the drive to the SCSI bus or have the host adaptor or other device supply terminator power to the external terminator. See Section 8.1 for illustrations that show how to place jumpers for this configuration.

LC drives

These drives cannot furnish terminator power because no conductors in the 80-pin I/O connector are devoted to terminator power.

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

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.

Seagate ST3146707LW/LC manual Terminator requirements Terminator power, LW drives, LC drives

Models: ST3300007LW/LC ST373207LW/LC ST3146707LW/LC