Open The Case
Installing a Floppy Drive
Installing a CD-Rom
   ID# Needed by CD Rom
Remove Fan Assembly
Installing a Hot Swap Drive
   Open and Lock Position
Removing a Hot Swap Drive
Installing a Backplane
          Extra Power Supply Required
Bay Locations
Configuring a Backplane
   ROM Address
   SCSI ID Jumper
   Termination
Non-Array Fast/Wide Cable Configuration
   Fast/Wide SCSI-2 Adapter (Takes you to the Corvette page)
   Single Channel, Single F/W
   Two Channel, Two F/W
   Three Channel, Three F/W
Array SCSI F/W RAID Cable Configuration
   Fast/Wide Streaming RAID Adapter /A (takes you to the Cheetah page)
   Single Channel, Single FWSR
   Dual Channel, Single FWSR
   Three Channel, Two FWSR
RAID Recovery Proceedure Not Effective

Open and unlock the door, removing it by  lifting it up and off the hinges. 

Unlatch the catch. (Tricky, I'm a poet and I don't know it). 

Yes, this is from another machine, BUT... same principle. 

Grasp the sides of the front cover and pull it forward.   (Or, you may grasp the handle at the top left corner of the server.) Detach the front cover's bottom hooks from the grooves located on the bottom of the server, and lift the front cover off the bottom of the server. 

Pivot the side cover away from the front of the server.  Remove the cover by carefully lifting it up and off the hinges. 

 The Enhanced 2.88MB Diskette Drive requires an  operating system, such as OS/2  2.1 or IBM DOS Version 5.02 or later to enable use of the software-eject and eject-disable features. 
 
 
 

CD Rom ID off Backplane
   You need to set the CD Rom to ID5 if it is plugged in to the Passthrough connector on the top RAID Backplane. The backplane adds 1 to any device ID# attached to the Passthrough connector. This makes it ID6, and the RAID drives won't onflict, nor will the RAID controller. 
I think there is a fix. Some update disk.
For a more verbose history, go HERE
 

If you are installing a CD Rom drive in bay B1, remove the CD Storage Compartment
 
 
 
 
 
 

   Internal drives are installed in bays.  A diskette drive and a CD-ROM drive are preinstalled in bay A in all models.  A removable CD storage compartment is shipped in bay B1.  You can install two drives in bay B.  You can install hot-swappable hard disk drives in banks C, D, and E only.  Banks C, D, and E each contain six bays. Banks C, D, and E support hot-swappable drives only. 

   You do not have to turn off the server to install hot-swappable drives in bank D.  However, you must turn off the server when performing the steps that involve installing or removing backplanes, cables, the fan assembly, and adapters. 

   Bank C supports up to six drives.  However, the total number of SCSI drives that you can install in bay B and bank C is six.  The number of preinstalled hard disk drives in bank C varies according to the model you purchased.  You can install up to six drives in bank D and up to six drives in bank E. 

Note:  The bank letter-designations are located on both vertical rails on the front of the server.  The bay-slot numbers are located on the top of bank C and the bottom of bank E. 

1. Disconnect the three fan assembly cables from the power supply. 

 Warning: To avoid damage and ensure proper server operation, handle the fan assembly carefully.

2. Remove the two screws that hold the fan assembly in place. 

3. Remove the fan assembly by pulling it up and out. 
 

    b. Secure the backplane with one screw. 
 
 
 
 
 
 

Front View (towards drives)

Rear View (towards fans)

J2 Signal Cable 68 pin header (Goes to SCSI controller) 
J9 SCSI ID jumper 
J10 DASD Status cable header 
J11 Power header 
Address Jumper ROM Address 
Passthrough Connector Connects drives in Bay "B" 

Note:  The DASD status connector is used in disk-array models only. 

SCSI ID Jumper
      If two backplanes are connected to the same adapter, one backplane must be set to high and the other one to low. 

SCSI ROM Address ID Jumper Setting	Description
HI=High	Assigns SCSI IDs 8 to D to the backplane
LO=Low	Assigns SCSI IDs 0 to 5 to the backbplane

ROM Address Jumper Setting
    If more than one backplane is installed in the computer, each backplane must have a different ROM address setting. 

Jumper Position	Description
C	Address for backplane installed in Bank C
D	Address for backplane installed in Bank D
E	Address for backplane installed in Bank E

Termination (Hot-Swap Back Plane)
  The hot-swap back plane is automatically terminated. Drives connected to the hot-swap back plane should not be terminated. 

Single Channel, Single Fast/Wide Adapter Cable Configuration

 
 
 
 
 

Cable routing in a non-disk-array model, with the backplane in bank C 1 cabled to an IBM SCSI-2 FWSR 2 in expansion slot 1.
 
 
 
 
 

Two Channel, Two Fast/Wide Adapter Cable Configuration

 
 
 
 

This view shows cable connections to two SCSI-2 adapters (IBM SCSI-2 Fast/Wide Adapter/A): cable routing from the second adapter 1 to the backplane in bank D 2.
 
 
 
 
 

Three Channel, Three Fast/Wide Adapter Cable Configuration

 
 
 
 

Non-disk-array model, with banks C and D populated, and both banks connected to SCSI-2 adapters.  A third SCSI-2 adapter 1 supports the backplane in bank E 2. 
 
 
 
 
 

Single Channel, Single RAID Adapter Cable Configuration

Cable routing in a disk-array model, with the backplane in bank C 1 cabled to an IBM SCSI-2 FWSR Adapter/A 2 in expansion slot 1.  A DASD status cable 3 connects the adapter to the backplane. 
 
 
 
 
 

Dual Channel, Single RAID Adapter Cable Configuration

Cable routing in an array model with backplane installed in bank D 1.  A DASD status cable 2 connects adapter to backplane.

Notes: 
    - Two separate cables are connected to the adapter.  One connects to the bank C backplane;  the other to the bank D backplane. 
    - When a backplane is installed in banks D and E, connect DASD status cable from the RAID adapter to the backplane.
 
 
 
 

Two Channel, Two RAID Adapters Cable Configuration

 
 

Cable routing in a disk-array model, with cable connections to two SCSI-2 adapters (IBM SCSI-2 Fast/Wide Streaming-RAID Adapter/A):  cable routing from the second adapter 1 to the backplane in bank D 2.  A DASD status cable 3 connects the adapter to the backplane.
 
 

Three Channel, Two RAID Adapter Cable Configuration

 Disk-array model, with two separate cables from the SCSI-2 adapter (IBM SCSI-2 Fast/Wide Streaming-RAID Adapter/A).  One cable is connected to the backplane in bank C1, the other to the backplane in bank D2.  A second SCSI-2 adapter 3 supports the backplane in bank E4.  A DASD status cable 5 connects the second adapter to the backplane.
 

Open and Locked Position

Note:  If you did not turn off your server before installing the drive, the light on the knob of the drive tray illuminates, indicating that the drive was installed correctly. 

Note:  If you have a disk-array model, you must reconfigure your disk arrays after installing hard disk drives. 

Warning: Before you hot-swap a drive, make sure it is defective.  If you partially or completely remove a good drive instead of a defective drive, your server might lose valuable data. 

Determining Defective Drive, Array
   If you have a disk-array model, thoroughly review the information displayed on your server's screen to determine the location of the failed drive.  Logical and Hard Disk Drive Status Indications explains the codes that your server uses to indicate a defective drive.  When a hard disk drive fails, a blinking green indicator light illuminates on the knob of the drive tray.  When a hard disk drive is good, a solid green indicator light illuminates on the knob of the drive tray. 

Determining Defective Drive, Non-Array
If you have a non-disk-array model, an illuminated drive tray knob means the drive is a good one.  An unilluminated drive tray knob means the drive is defective, or no power is being supplied to the drive. 

If you partially or completely remove a good drive instead of the defective one, your server might lose valuable data.  This situation is especially relevant if you assigned RAID level 1 or 5 to the logical drives in your disk array.  However, the RAID controller can rebuild the data you need, provided that certain conditions are met.  See Starting the RAID Configuration Program for further details. 

To remove a drive from bank C, D, or E, do the following steps: 

 1. Find the defective drive you plan to remove. 
 2. Ensure that you have selected the correct drive for removal by verifying that the light on the tray's knob is blinking or not illuminated. 
 3. Unlock the drive by turning the knob directly above it 90 degrees. 
4.  Disconnect the drive from the connector on the backplane, by grasping the handle on the drive tray and pulling the drive out of the server.  Store the drive in a safe place. 

Note:  If you have a disk-array model, you must reconfigure your disk arrays after removing hard disk drives.  See Starting the RAID Configuration Program for details. 

Warning- I vaguely remember a snippet on allowing the drive to spin down after you rotate the knob to the unlocked position. 

Symptom:  A single drive failed, but 2 RAID fixed disk drives appear as DDD (Defunct the drive is not responding to commands). Routine recovery procedures are ineffective in 
bringing the DDD drive(s) back on-line. 

NOTE: The system may have run without problems for some time. 

Problem Isolation AIDs 
      The system is a Server 500 RAID Array (8641) 
      The system diagnostics do not fail 
      The RAID Administration program appears normal 
      More than one DASD backplane is installed 

Fix: / Background The RAID controller requires two cables to be attached to the DASD backplane in order to maintain control of the RAID subsystem, the SCSI signal cable (wide), and a much smaller Status cable. The backplane in Bank C must be attached to SCSI Connector Channel 1. If installed, DASD backplane in Bank D would be attached to SCSI Connector Channel 2. The same is true of the Status cables. Status connector 1 must be attached to DASD backplane C and Status Connector 2 must be attached to DASD backplane D, if installed. 

The signal cable and status cables for each channel may not be connected to the same backplane. (For example: The Status cable for the backplane is mistakenly connected to bank D, and vice-versa). In this case, the RAID adapter is not communicating with the correct backplane (but has no way of knowing this), so erroneous status information is being presented to the RAID adapter. 

Attempting to rebuild a fixed disk with the cables connected in this manner will probably result in data loss. 

In systems which have more than one DASD backplane installed, make certain that the RAID Channel 1 (SCSI) signal cable and the RAID Channel 1 Status cable are both attached to the same backplane (are not crossed). 

All artwork on this page is from IBM documentation. IBM retains all copyright to them.