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FFD 3.5

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 SCSI Flash Disk User Manual 

45-SR-001-01-7L REV 4.0 

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8.2.4   Solving Installation Problems 

The problems that arise in most installations are described below. 

Unstable Termination 

This occurs when there is a passive termination with Fast-SCSI devices on the bus. 

Incorrect Termination 

This occurs when there are too many devices terminated, or when the SCSI bus cable ends are not 
terminated. 

Cables 

Avoid using homemade, short, flat ribbon cables with bad contacts or cheap cables. Do not mix 
round cables with flat cables. 

Cable Length 

Ensure that the cable length is within the limit specified in the standard, and avoid using cables that 
are too long to support the transfer rate. 

Device ID Conflict 

This occurs when a new device is added with a SCSI ID identical to an existing device on the bus. 

Missing TRMPWR 

This occurs when the host adapter or at least one of the devices on the SCSI bus does not supply 
termination power. 

Missing Software Device Driver 

Some host adapters do not install support for SCSI drives as an expansion BIOS. In this case, load an 
additional driver for your operating system after the system boots. Note that this configuration cannot 
boot from the SCSI drive. 

Summary of Contents for Section II

Page 1: ...Section II User Manual FFD 3 5 SCSI Flash Disk MARCH 2002 45 SR 001 01 7L REV 4 0 ...

Page 2: ... Flash Disk Drive Installation 8 5 3 1 Installing the FFD in a PC 8 5 3 2 Using the FFD on a DOS Based Platform 10 5 3 3 Using the FFD on a UNIX Based Platform 10 6 Drive Parameters 12 6 Drive Parameters 12 7 LED Indicators and Configuration Switch 14 8 Troubleshooting 15 8 1 Built In Self Test 15 8 2 Common Problems 15 8 2 1 Installing Your SCSI Host Adapter 15 8 2 2 Termination Configuration 16 ...

Page 3: ... your kit contains the following items FFD 3 5 SCSI Flash Disk Throughout the remainder of this document the FFD 3 5 SCSI Flash Disk will be referred to as FFD 4 mounting screws M Systems part no 01 SC 034 00 If any items are missing please contact your dealer 3 Visual Inspection Before unpacking or handling a drive take all proper electrostatic discharge ESD precautions including personnel and eq...

Page 4: ...se instructions may void your warranty Always take all proper ESD precautions including personnel and equipment grounding Always operate the FFD within the environmental specifications Always use a grounded wrist strap when handling the FFD Drives that are not installed in the system are sensitive to ESD damage Always handle the FFD carefully Never apply DC power to the drive by plugging an electr...

Page 5: ... while the FFD is powered OFF otherwise the FFD may be damaged or the new settings may not be recognized Figure 1 shows the orientation of the DIP switches Note that the numbers are displayed upside down However the order of the DIP switches correspond correctly to the numbers printed next to each switch Figure 1 Front Panel DIP Switches 5 2 1 SCSI ID Every device on the SCSI bus must have a uniqu...

Page 6: ... the devices connected at either end supply terminations Devices that are not located at the end of the cable must have their terminations disabled otherwise they will cause a degradation of the signal quality Too many terminations will cause intermittent errors or other problems when accessing devices on the SCSI bus If the FFD is the last device on the cable then the terminations must be enabled...

Page 7: ...h Settings TRMPWR Switch 5 Enabled ON Disabled1 OFF 1 Default factory setting 5 2 4 Write Protection The FFD has an internal active write protection option The write protection WP is software implemented and the switch value is retrieved during the FFD power cycle bus device reset Toggling the WP switch must be followed by a reset to activate the write protection option Write protection disables t...

Page 8: ...cover 2 Check the adapter s memory I O and IRQ settings and verify that they do not conflict with any other devices installed in the system 3 Configure the FFD s DIP switch settings according to the information provided in Section 5 2 4 Verify that the SCSI bus is properly terminated Refer to Figure 2 for termination configuration options 5 Connect a 50 pin ribbon cable between the FFD and the ada...

Page 9: ... External Terminator SCSI device 3 Terminated through Termination Resistors Installed Termination Resistors Installed Termination Resistors removed SCSI BUS PC SCSI adapter PC SCSI adapter PC SCSI adapter SCSI device 0 not terminated SCSI BUS SCSI BUS SCSI BUS Figure 2 SCSI Cable Connection and Termination Configuration Adaptec AHA 2940 Ultra Ultra W BIOS v1 23 c 1996 Adaptec Inc All Rights Reserv...

Page 10: ...er supply and cables WARNING Installing any disk drive on a UNIX system is a very complex procedure If you are not an expert consult your system administrator for help Failure to do so can lead to loss of data on existing drives in the system Refer to your UNIX documentation for more details regarding the installation procedure for SCSI disks under UNIX To install the FFD in a UNIX based platform ...

Page 11: ... instructions 2 Select the FFD from the list of drives 3 Define a new drive and manually enter the drive parameters using the type option Refer to Table 5 for a list of the appropriate drive parameters 4 Define the partitions according to your system requirements 5 Run the format and analyze command 6 Use the label command to partition and initialize the drive 7 Exit the format routine 8 Build the...

Page 12: ...H 10H 40H 512 64 1E3FFH 79H 10H 40H 512 128 3CF7FH F3H 10H 40H 512 192 5BAFFH 16EH 10H 40H 512 256 7A67FH 1E9H 10H 40H 512 320 991FFH 264H 10H 40H 512 384 B7D7FH 2DFH 10H 40H 512 448 D68FFH 35AH 10H 40H 512 512 F547FH 3D5H 10H 40H 512 576 113FFFH 450H 10H 40H 512 640 132B7FH 4CAH 10H 40H 512 704 1516FFH 545H 10H 40H 512 768 17027FH 5COH 10H 40H 512 832 18EDFFH 63BH 10H 40H 512 896 1AD97FH 6B6H 10H...

Page 13: ...BFFH 1427H 10H 40H 512 2 816 5472FFH 151CH 10H 40H 512 3 072 5C20FFH 1708H 10H 40H 512 3 328 63CF7FH 18F3H 10H 40H 512 3 584 6B7D7FH 1ADFH 10H 40H 512 3 840 732B7FH 1CCAH 10H 40H 512 4 096 7AD97FH 1EB6H 10H 40H 512 4 352 82877FH 20A1H 10H 40H 512 4 608 8A357FH 228DH 10H 40H 512 4 864 91E3FFH 2479H 10H 40H 512 5 120 9991FFH 2664H 10H 40H 512 5 376 A13FFFH 2850H 10H 40H 512 5 632 A8EDFFH 2A3BH 10H 4...

Page 14: ...Indicators Table 6 LED Status Description Status LED Color Indicator Description POWER Green Indicates that power is applied to the disk The LED remains ON if everything is okay and flashes at a rate of 1 Hz to indicate that the power up and built in self test have failed and that the disk is malfunctioning BUSY Red Indicates that the FFD is being accessed The LED is lit when the disk is accessed ...

Page 15: ...electing all resources enter them in your list of resources 3 Install the host adapter in the PC and power it ON If you did not un install the BIOS a BIOS boot message similar to the following is displayed Adaptec AHA 2940 Ultra Ultra W BIOS v1 23 c 1996 Adaptec Inc All Rights Reserved Press Ctrl A for SCSI Select TM Utility SCSI ID LUN NUMBER 0 0 DEC DSP3085S B SD16 Drive C 80h SCSI ID LUN NUMBER...

Page 16: ...ctor on the bus you must disable termination on the device When installing an external SCSI device in a system that has only internal devices you must disable the host adapter s termination using one of the following methods Using software as with the newer Adaptec By removing the terminator packs typically three near the host adapter s SCSI connector By setting a jumper on the host adapter The si...

Page 17: ... mix round cables with flat cables Cable Length Ensure that the cable length is within the limit specified in the standard and avoid using cables that are too long to support the transfer rate Device ID Conflict This occurs when a new device is added with a SCSI ID identical to an existing device on the bus Missing TRMPWR This occurs when the host adapter or at least one of the devices on the SCSI...

Page 18: ... and serial number of your FFD Description of your computer hardware manufacturer model attached devices etc Description of your SCSI host adapter and associated drivers Description of your software operating system version application software etc A complete description of the problem The exact wording of any error messages Before contacting M Systems directly first contact your dealer If your de...

Page 19: ... This led to SCSI 2 s development and approval before SCSI 1 was even officially approved In 1986 when SCSI 1 was officially approved SCSI 2 already was far along in the development process The official SCSI 2 designation is X3 131 1994 SCSI 2 provided a better formal definition removed some oddities and obsolete items added some extensions and most importantly added the ability to double and even...

Page 20: ... and 7 there is no particular ID that must be assigned to a particular device type Additionally every ID can have up to seven subunits identified by a LUN Logical Unit Number enabling addressing multiple devices through a single ID Table 7 General Description of SCSI ID ID Number Description ID 7 Reserved for the host adapter ID 0 For a boot device usually a hard drive ID 1 Normally used for a sec...

Page 21: ...as most external single ended cables prohibit use of 10MHz Q Signal Levels A Single Ended SCSI signal levels vary from 0V to 5 25V All signals are active low True is a voltage level between 0 and 0 8 V and false is a voltage between 2 and 5 25 V Differential SCSI signals conform to the EIA RS 485 interface Q What is Single Ended and Differential SCSI A There are two different electrical SCSI inter...

Page 22: ...u Rd Lou Hu District Shenzhen China 518001 Phone 86 755 519 4732 Fax 86 755 519 4729 Japan Office M Systems Japan Inc Arakyu Bldg 5F 2 19 2 Nishi Gotanda Shinagawa ku Tokyo 141 0031 Phone 81 3 5437 5739 Fax 81 3 5437 5759 Europe Israel Office M Systems Ltd 7 Atir Yeda St Kfar Saba 44425 Israel Phone 972 9 764 5000 Fax 972 3 548 8666 M Systems assumes no responsibility for the use of the material d...

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