Service Manuals, User Guides, Schematic Diagrams or docs for : apple misc hard_drives

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K Service Source




  Hard Drives
         SCSI Drives
          IDE Drives
K Service Source




        Basics
     Hard Drive
Basics                                                IDE Drives - 1


         IDE Drives
         Intelligent drive electronics, IDE, incorporates controller
         hardware into the drive. IDE is offered in 8- and 16-bit
         interface types. Eight-bit drives are sometimes referred to
         as XT interface drives, and 16-bit drives are sometimes
         referred to as AT interface drives.

         IDE drives do not use a SCSI bus. Apple computers continue
         to use an external SCSI chain, which is supported by a SCSI
         chip on the logic board.

         Also, Apple's HD SC Setup works with IDE drives.
Basics                             WIDE and FAST SCSI Protocols - 2


         WIDE and FAST SCSI Protocols
         SCSI chains that use SCSI-2 protocols are faster than SCSI
         chains using the original SCSI protocols. Two terms used in
         the SCSI-2 protocol are "WIDE" and "FAST."

         The term "WIDE" defines the 2-byte or 4-byte wide data
         interface where each data byte uses its corresponding parity
         bit. The traditional SCSI-1 interface protocol is 1 byte
         wide. "FAST" SCSI is defined as data transfer rates between
         5 MHz and 10 MHz.

         Check these protocols against individual drives for
         comparative data.

         Devices using the SCSI-2 WIDE and FAST protocols are
         compatible with existing SCSI-1 devices.
 K Service Source




Troubleshooting
      Hard Drive
Troubleshooting                                                         General/ - 1


                  General
                  The Symptom Charts included in this chapter will help you
                  diagnose specific symptoms related to your product. Because cures
                  are listed on the charts in the order of most likely solution, try
                  the first cure first. Verify whether or not the product continues to
                  exhibit the symptom. If the symptom persists, try the next cure.
                  (Note: If you have replaced a module, reinstall the original module
                  before you proceed to the next cure.)

                  If you are not sure what the problem is, or if the Symptom Charts
                  do not resolve the problem, refer to the Flowchart for the product
                  family.

                  For additional assistance, contact Apple Technical Support.
Troubleshooting                                                 HD SC Setup/ - 2


                  HD SC Setup
                  Before you replace any drive hardware, run HD SC Setup to
                  update the driver on the drive.

                  HD SC Setup works with SCSI and IDE drives.
K Service Source




     Upgrades
    Hard Drives
      Upgrades                                   Drives in Quadra 900/950 - 1


                                                  Drives in Quadra
 Hard Drive Carrier
                      Hard Drive Mechanism        900/950
SCSI Select                                       There are three general
  Cable
                                                  procedures for preparing
                                   Termination
                                   Resistors      hard drives for Quadra 900/
                                                  950 computers:
                                                  

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