8.1.2Function description

J2

 

 

 

jumper

 

 

 

installation

Jumper function description

 

SE

 

 

 

On

 

Forces drive to use single-ended I/O drivers/receivers only.

Off

 

Drive can operate on the interface in low voltage differential mode or single-ended, depend-

 

 

ing on the voltage state of the I/O “DIFFSNS” lineDefault.

is SE jumper not installed.

DS

ME

 

 

Off

Off

Spindle starts immediately after power up - Default setting.

Off

On

Drive spindle does not start until Start Unit command received from host.

On

Off

Spindle Startup is delayed by SCSI ID times 12 seconds after power is applied, i.e., drive 0

 

 

spindle starts immediately when DC power connected, drive 1 starts after 12 second delay,

 

 

drive 2 starts after 24 second delay, etc.

 

On

On

Drive spindle starts when Start Unit command received from host. Delayed start feature is

 

 

overridden and does not apply when ME jumper is installed.

WP

 

 

 

On

 

Entire drive is write protected.

 

Off

 

Drive is not write protected. Default is WP jumper not installed.

PD

 

 

 

On

 

Parity checking and parity error reporting by the drive is disabled.

Off

 

Drive checks for parity and reports result of parity checking to host.

 

 

Default is PD jumper not installed.

 

RES

 

 

 

Off

 

Reserved jumper position. Default is no RES jumper installed.

TP

 

 

 

Off

 

The drive does not supply terminator power to external terminators or to the SCSI bus I/O

 

 

cable.

 

On

 

Drive supplies power to SCSI bus I/O cable. When drives have differential I/O circuits, a

 

 

jumper on the TP position may be needed to power external terminators (see system docu-

 

 

mentation). These drives do not have terminator circuits on the drive.

Note.

J2 does not exist on LC models and is supported on LW models only.

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

49

Page 59
Image 59
Seagate ST373207LW/LC, ST3146707LW/LC, ST3300007LW/LC manual Function description, Res

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.