User manual QUANTUM STT220000NX

[. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . STT20000N, STT20000N-C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (standard and NS-20 versions) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . © 1998 Seagate Technology, Inc. All rights reserved No part of this publication may be reproduced in any form without written permission from Seagate Technology, Inc. Publication Number 10005135-001, March 1998 Seagate, Seagate Technology, the Seagate logo and Sidewinder are trademarks or registered trademarks of Seagate Technology, Inc. [. . . ] When at least one device supplies TERMPWR, these conditions may be met by any valid configuration of targets and initiators. · All signals use open-collector drivers. The output characteristics (measured at the connector of the drive) of signals driven by the STT20000 SCSI minicartridge drive are: · · Signal assertion (low-level output voltage): 0. 0 to 0. 5 VDC at 48 milliamps sinking Signal negation (high-level output voltage): 2. 5 to 5. 25 VDC Signals received by the STT20000 SCSI minicartridge drive have the following characteristics. · · · · Signal assertion (low-level input voltage): 0. 0 to 0. 8 VDC Signal negation (high-level input voltage): 2. 0 to 5. 25 VDC Maximum input load (low-level input current): - 0. 4 at 0. 5 VDC Minimum input hysteresis: 0. 2 VDC Page 24 STT20000A Product Manual Installation Chapter 3 Single-ended SCSI connector The STT20000 SCSI minicartridge internal drive provides a 50-pin, right-angle, dualrow connector on the main PCB at the rear of the drive. The pin assignments for this single-ended connector are listed in the following table. Note: All odd pins except pin 25 are connected to signal ground at the drive. A signal name or abbreviation preceded by a ­(dash) indicates that the signal is active-low. Pin 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 Assignment ­DB(0) ­DB(1) ­DB(2) ­DB(3) ­DB(4) ­DB(5) ­DB(6) ­DB(7) ­DB(P) GROUND GROUND GROUND TERMINATOR POWER GROUND GROUND ­ATN GROUND ­BSY ­ACK ­RST2 STT20000N Product Manual Page 25 Chapter 3 Installation Pin 42 44 46 48 50 1 Assignment ­MSG ­SEL ­C/D ­REQ ­I/O The +5V drive supply is available on the SCSI connector as a terminator power option. The option is a hardware jumper on the rear PCB of internal drives with terminator power disabled as a factory default. On the drive, -RST is input only. 2 Page 26 STT20000A Product Manual Drive operation and maintenance Chapter 4 Drive operation and maintenance Introduction 4 This chapter describes important operational procedures for the STT20000 SCSI minicartridge drive. It covers the following topics: · · · · Operation of the front panel LED Using cartridges Loading revised firmware (updating flash EEPROM) Drive maintenance and troubleshooting Front panel LED operation The front panel of the Travan drive contains the cartridge opening and one amber, light-emitting diode (LED). Figure 4-1 shows the front panel of the internal drive. Figure 4-1 Front panel of 3. 5-inch internal drive DRIVE ACTIVE (AMBER) STT20000N Product Manual Page 27 Chapter 4 Drive operation and maintenance Using Travan cartridges The minicartridges recommended for use with the STT20000 SCSI minicartridge drive are listed in Chapter 2. This section describes some operations using the cartridges. Loading and unloading tape cartridges Your tape drive has a flip-up door that covers the cartridge opening when a tape cartridge is not installed in the drive. Once a cartridge is inserted, it is held firmly in place by the drive's positive locking mechanism. Complete any tape operations and wait until the amber LED is OFF before removing the cartridge. To load a cartridge, insert it with the metal base plate down and the tape access door facing into the drive. Figure 4-2 illustrates the loading of a cartridge. Figure 4-2 Loading a Travan cartridge To unload a cartridge, wait until the drive activity LED is OFF and then pull the cartridge straight out. Figure 4-3 illustrates the unloading of a cartridge. Figure 4-3 Unloading a Travan cartridge Page 28 STT20000A Product Manual Drive operation and maintenance Chapter 4 Setting the write­protect switch Travan minicartridges feature a write-protect switch located in the upper left corner of the cartridge. Use this switch when you want to make sure that important data on the tape will not be overwritten. Figure 4-4 shows the cartridge with the switch in the non-protected (read/write) or unlocked position. Figure 4-4 Write-protect switch in unlocked position Figure 4-5 shows the tab in the protected (read only) or locked position. Figure 4-5 Write-protect switch in locked position To return a cartridge to the "writeable" state, push the switch toward the end of the cartridge or to the unlocked position. . Loading revised firmware from a Seagate firmware cartridge The STT20000 SCSI minicartridge drive uses flash EEPROM. Flash EEPROM enables you to download new firmware when revisions to firmware are released. Firmware revisions are released on specially encoded cartridges that are automatically recognized by these drives. These firmware revisions are available for qualified OEMs only from Seagate Technology. Allow the system boot up process to reach the point where there is no SCSI bus activity. STT20000N Product Manual Page 29 Chapter 4 2. Drive operation and maintenance Place the firmware upgrade cartridge record switch to the nonrecord position. Insert the firmware upgrade cartridge in the drive and observe the amber LED light on the front of the drive. 3. [. . . ] ECC--(Error Correction Code) Special drive generated information that can be used to correct bad blocks. ECC block--A block containing drive-generated ECC data in its data field and part of control field. Encoding--A method whereby a group of data bits is translated into a group of recording bits. End-of-Data (EOD)--Indicates the point where the host stopped writing data to the tape. [. . . ]