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Cheetah 10K.7 36GB SCSI Installation Guide

ST336807LW/LC

Publication Number: 100358431, Rev. A, November 2004

Handling precautions/Electrostatic discharge protection

•The host system’s SCSI controller usually uses SCSI ID 7.

•If you have an LC model drive, the host normally sets the ID over the I/O interface, so you don’t need to worry about this step.

•If you have an LW model drive, some systems provide a cable designed to connect to the J5 jumper block on the drive to remotely set the ID. You can connect this cable to J5 and use the host-provided remote switch to set the SCSI ID. This J5 connector is not present on LC model drives.

•Disc drives are fragile. Do not drop or jar the drive. Handle the drive only by the edges or frame.

•Drive electronics are extremely sensitive to static electricity. Keep the drive in its antistatic container until you are ready to install it. Wear a wrist strap and cable connected to ground. Discharge static from all items near or that will contact the drive. Never use an ohmmeter on any circuit boards.

•Turn off the power to the host system during installation.

•Always use forced-air ventilation when operating the drive.

•Use caution when troubleshooting a unit that has voltages present.

•Do not disassemble the drive; doing so voids the warranty.

•Return the entire drive for depot service if any part is defective.

•Do not apply pressure or attach labels to the drive.

Electromagnetic compliance

See Safety and Regulatory Agency Specifications, p/n 75789512.

Drive characteristics

	ST336807 LW/LC
Formatted capacity	36 Gbytes
Total # of data blocks (512 byte sector size)	71,687,372 (445DCCCh)
Cylinders (user accessible)	90,774

Drive

Front

Jumper Plug (enlarged to show detail)

J6							Pin 1
J6
Reserved	L	R	A		A		A A
Reserved	E	E	A	3	A	2	A A
	D	S		3		2	1 0
SCSI ID = 0							(default)

SCSI ID = 1

SCSI ID = 2

SCSI ID = 3

SCSI ID = 4

SCSI ID = 5

SCSI ID = 6

SCSI ID = 7

SCSI ID = 8

SCSI ID = 9

SCSI ID = 10

SCSI ID = 11

SCSI ID = 12

SCSI ID = 13

SCSI ID = 14

SCSI ID = 15

			Drive HDA
				Rear
68 Pin		J5
SCSI I/O	+5V	J5		J1
Connector	Pin 1 Ground	Pin 1 DC Power
		4P	3P 2P	1P
J1
SCSI ID = 0			(default)	PCBA
SCSI ID = 1

SCSI ID = 2

SCSI ID = 3

SCSI ID = 4

SCSI ID = 5

SCSI ID = 6

SCSI ID = 7

SCSI ID = 8

SCSI ID = 9

SCSI ID = 10

SCSI ID = 11

SCSI ID = 12

SCSI ID = 13

SCSI ID = 14

SCSI ID = 15

not used A3 A2 A1A0

Heads (user accessible)	1
Disc rotation ± 5%	10,000 RPM
Operating voltages	+5V	+12V
Typical operating current (amps)	0.60	0.72

•Screwdriver and four 6-32 UNC drive mounting screws

•Forced-air ventilation to provide adequate drive cooling

•An unused drive power connector (not applicable to LC models)

To operate at LVD transfer rates, you may also need an LVD-capable SCSI host adapter, LVD I/O cable and active negation external terminator.

Multimode interface

This drive can operate in single-ended (SE) or low voltage differential (LVD) mode. This multimode capability provides backwards compatibility so you can use it with or without an LVD-capable host adapter. The primary bene- fits of LVD technology include faster transfer rates, increased allowable cable lengths, and improved device connectivity.

You can configure the drive to detect between SE and LVD modes automat- ically or force it to operate in SE mode only. To configure this option, see Figure 2.

Note. To operate at Ultra2 rates or faster in LVD mode, all devices on the same bus (cable) must be running in LVD mode. If you add any SE device to the bus, all devices on that bus operate in SE mode.

Note. Some LVD host adapters provide an LVD connector and an SE con- nector on the same host adapter to allow you to run SE and LVD drives concurrently at their maximum capabilities. Check your SCSI host adapter documentation. See Figure 3.

Caution. Do not mix LVD drives on the same bus with high voltage differ- ential (HVD) devices—drive damage may occur.

Installation instructions

1. Set the SCSI ID

Determine which SCSI IDs are already being used in the system and then assign this disc drive a SCSI ID that isn’t already being used. Use the J6 connector located on the front of the drive to set the SCSI ID (see Figure 1).

•Most Cheetah® 10K.7 drives are factory set with the SCSI ID set at 0. If this is the only SCSI drive in your system and there are no other SCSI devices on the daisychain, you can leave this drive’s SCSI ID set to 0 and proceed to the next step.

Figure 1. Setting the SCSI ID (the J5 block is on LW models only)

2. Configure termination

If you are installing the drive in a system that has other SCSI devices installed, terminate only the end devices on the SCSI bus (cable). This drive does not have internal terminators or any other way of adding internal termi- nation on the drive. You must provide external termination when termination is required. This is normally done by adding an inline terminator on the end of the cable. See Figure 3 for an illustration showing a system configuration that uses an external terminator.

•Use active (ANSI SCSI-2 Alternative 2) single-ended terminators when terminating a bus operating in single-ended mode.

•Use SPI-2-compliant active low voltage differential terminators when ter- minating a SCSI Ultra2 bus operating in LVD mode.

•The host adapter is normally on the end of the bus and internally termi- nated. You can configure your bus with another device on the end if you remove termination from the host adapter.

3. Configure terminator power (LW model only)

Terminators have to get power from some source. The default configuration results in the drive not supplying termination power to the bus. You should normally leave this drive set at this default unless your host system requires the drive to supply termination power to the bus. To configure this drive to supply termination power to the bus, place a jumper on J2 (LW model only) pins 1 and 2 as shown in Figure 2.

4. Connect the drive activity LED (optional)

Connect the Drive Activity LED cable to J6 pins 11 and 12 (see Figure 2), or connect a drive ID and Drive Activity LED cable to J5, depending on host system requirements.

5. Check the other available jumper settings

Select other options on J2 (LW model only) as illustrated in Figure 2. Do not change these unless instructed to do so by the host system documentation.

ST336807LW/LC specifications

The Seagate ST336807LW/LC is a high-capacity 3.5-inch hard disk drive designed primarily for enterprise storage environments. As part of Seagate's Barracuda line, this drive is known for its reliability and performance, catering to the growing demands of data centers and businesses that require robust storage solutions.

One of the standout features of the ST336807LW/LC is its impressive storage capacity, offering 360 GB of disk space. This substantial amount of data storage supports a variety of applications, including file servers, database management systems, and backup solutions. The drive operates at a spindle speed of 7,200 RPM, which provides a good balance between performance and energy efficiency, making it an ideal choice for enterprise use.

Equipped with an Ultra ATA/100 interface, the ST336807LW/LC facilitates fast data transfer rates, ensuring that users can access their data quickly and efficiently. This interface standard allows for a maximum theoretical data transfer rate of 100 MB/s, which is synchronous with the performance requirements of modern computing systems.

The ST336807LW/LC features Seagate's innovative technologies designed to enhance durability and data integrity. The drive incorporates error correction codes, including the Advanced Format technology, which improves read/write accuracy and boosts performance by utilizing larger capacities for data management. This technology helps minimize data loss risks, ensuring that sensitive information remains secure.

Additionally, the drive benefits from Seagate's Smart, an inbuilt feature that assists in monitoring the health of the HDD through various metrics. This capability allows users to anticipate potential failures and take proactive measures to safeguard their data, reinforcing the drive’s reliability as a storage solution.

The ST336807LW/LC is designed for an operational lifespan of several years, making it suitable for continuous use within demanding environments. With its focus on performance, capacity, and reliability, the Seagate ST336807LW/LC stands out as a formidable option for organizations requiring dependable and efficient data storage solutions. Its combination of advanced technologies and solid construction makes it a well-rounded choice for modern IT infrastructures.

Seagate ST336807LW/LC installation instructions Electromagnetic compliance, Drive characteristics

Models: ST336807LW/LC