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Record number: H132199
Device: D/T8642 Service code: 33
ECA number: ECA001 Parts source:
EC number: EC000000 Publish flag: R
Mandatory: N Hit count: UHC00448
Automatic shipment: N Success count: USC0000
Availability date: 96/01 Publication code: PC50
Plant of control: 27 Date created: O96/01/15
Tip key: Date last altered: A98/05/11
Owning B.U.: USA
Abstract: ECA001, 320/720 SCSI CABLE REPLACEMENT TO SUPPORT CDROM
PURPOSE:
------------- Note: This ECA expires September 3, 2002----------
This ECA provides SCSI cables to replace the existing SCSI cable shipped in a limited
number of Server 720 (8642) Systems OR PC Server 320 (8640) EISA/PCI Systems configured
with a Hot-Swap Bay Option and at least one 16 bit SCSI Drive.
The new cable(s) eliminate a potential cause of intermittent read errors and general
failures when reading from a 8 bit SCSI device during periods of high activity on the SCSI channel.
FEATURES:
Type, Machines Affected
Model, With and/or Feature/Device B/M to be Service Syste
Stage B/M Description Installed Hours Hours
8642 B/M0000000 PC SERVER 720 B/M0000000 00.5 00.3
MODELS 0Z0, 1Z0, 2ZS,
AND 4ZS, MFG. BEFORE
12/12/95.
(MFG DATE: 512)
8640 B/M0000000 PC SERVER 320 B/M0000000 00.5 00.3
MODELS 0X*, 0Y*, 1Y*
WITH HOT-SWAP BAY.
PHYSICAL CHECK:
Affected Systems are PC Server 720 Type 8642 model 0Z0, 1Z0, 2ZS, 4ZS manufactured in 1995,
utilizing a SINGLE Multi-connector SCSI Cable (FRU P/N 06H6661 or 06H6675) and PC Server 320 Type 8640
model 0Xx, 0Yx, 1Yx configured with a Hot-Swap Bay Option utilizing a SINGLE Multi-connector SCSI
Cable (FRU P/N 06H6876), and at least one 16-bit SCSI Hard Drive.
PC Server 720 and 320 Systems with the TWO-CABLE SCSI attachment design are not affected.
Check the System to determine the cabling method installed according to the following diagrams:
The CD-ROM is attached between the RAID controller or SCSI adapter and the DASD backplane, as follows:
o---------------------o----o---------o--------o o
______|_____ | | ___|___ _|___|_
|RAID ADAPTER| Extra "drops" |CD-ROM| | DASD |
| or | (connectors) | | | BACK-|
|SCSI ADAPTER| for additional | | | PLANE|
|____________| SCSI devices |______| |______|
(Channel A) (BAY A1) (BANK C)
This configuration includes:
- OR -
The DASD BACKPLANE is attached between the RAID controller or SCSI adapter and the CD-ROM, as follows:
Cable: Cable:
P/N 82G3613 P/N06H3751
- OR -
P/N 06H6876
o--------o----o o--------o-------------o----o--o Term.
_____|______ | _|____|_ ___|___ | |
|SCSI ADAPTER| |DASD | |CD-ROM| Extra "drops"
| or | |BACK- | | | (connectors)
|RAID ADAPTER| |PLANE | | | for additional
|____________| |______| |______| 8-Bit SCSI devices
(Channel A ) (Bank C) (Bay A1)
This configuration requires:
- AND -
- OR-
The CD-ROM is attached between the RAID controller or SCSI adapter and the DASD backplane, as follows:
o---------------o-------------o TOP
______|______ ___|___ ___|____
|RAID ADAPT.| |CD-ROM | |DASD |
| or | | | |BACK- |
|SCSI CONTR.| | | |PLANE |
|___________| |_______| |______|
|
o
This configuration includes:
Cable:
P/N 06H6876
o------------o--------o TOP
_____|______ | ___|____
|SCSI ADAPTER| |DASD |
| or | |BACK- |
|RAID ADAPTER| |PLANE | Cable:
|____________| |______| P/N 06H3751
|
o------- o----------o----o--o Term.
___|___ | |
|CD-ROM| Extra "drops"
| | (connectors)
| | for additional
|______| 8-Bit SCSI devices
This configuration includes:
**************************************************************
If the Server has the SINGLE SCSI cable, with the CD-ROM
attached between the SCSI controller (or the RAID adapter) and
the DASD Backplane, this ECA is applicable (see 1 and 3 above).
**************************************************************
PREREQUISITES: NONE
COMPANION: NONE
CONCURRENT: NONE
DETAIL:
Early production of the Server 720 and all of the Server 320
Hot-Swap models contained a single multi-drop SCSI cable to
connect the 8-bit CDROM drive, SCSI or RAID Adapter, and the
Hot-Swap Backplane. Some of these Systems, with 8-bit SCSI
devices (CDROM drive) installed between the SCSI Adapter and hot
Swap Backplane have experienced intermittent "General Failures"
or "Read Errors"(example: CDROM reads) Specifically the 4x
CDROM configured in the Server 720.
These failures may occur during applications or diagnostics.
The frequency of failure may change with removal or addition of 16-Bit Hard drives.
While no failures have been observed on 720 Systems with the 2X
CDROM drive, the two cable solution should be used to ensure
stability. This situation is not a fault of the 4X CDROM drive
but specific to placement of a 8 Bit SCSI Device between the 16
Bit SCSI / RAID Adapter and the 16 Bit hard drives on the SCSI
Bus of the 320 and 720 Servers.
Example:
16-Bit --------- 8-Bit -------- 16-Bit
RAID or Drive Drive(s)
Non-RAID (CDROM) (Hard Drives)
Adapter
The two cable configuration resolves this problem by locating
the 8-Bit SCSI Devices AFTER the 16-Bit SCSI Devices.
Example:
16-Bit --------- 16-Bit --------- 8-Bit
RAID or Drive(s) Drive(s)
Non-RAID (Hard Drives) (CDROM, Etc.)
Adapter
For the 720:
Order one of FRU P/N 06H3751 and either FRU P/N 82G3613 (Array) or P/N 06H6876 (Non-Array)
using normal parts ordering procedures.
The RAID Controller or SCSI Adapter to Backplane cable will attach to the Backplane next to the power connector.
Cable FRU P/N 06H3751 (Backplane-CDROM-Terminator Cable) will connect from the second connector (on the opposite side of the
Backplane) to the CDROM drive and will contain termination.
For the 320:
Order one of the FRU P/N 06H3751 using normal parts ordering procedures.
Disconnect the Original Cable from the CDROM.
Cable FRU P/N 06H3751 (Backplane-CDROM-Terminator Cable) will connect
from the second connector (bottom connector) of the Hot-Swap
Backplane to the CDROM drive and will contain termination.
NOTE: All 8-Bit SCSI devices in including the CDROM must be
connected to the second cable in either the 320 or 720 Server.
Cable FRU P/N Reference for 2 cable configurations in the 320 and 720 Servers:
FRU Number Description
----------- -------------------------------
82G3613 ............. RAID Controller to Hot-Swap Backplane
cable for 720 RAID Array Systems
06H6876 ............. SCSI Adapter to Hot-Swap Backplane
cable for 720 Non-RAID Array Systems
06H3751 ............. Bottom/end of Hot-Swap Backplane to
CDROM Terminator Cable (all 320 / 720)
06H6876 ............. SCSI Adapter / RAID Controller to
Hot-Swap Backplane cable for 320 with
Hot-Swap Bay Option (standard)
NOTES: Only the FRU Part numbers listed above (82G3613, 06H6876 and
06H3751 for 720, 06H3751 for 320) are eligible for reimbursement under this ECA.
Use Service Code 33, Other office worked 990, and ECA001 to record parts and labor.
This ECA expires September 3, 2002
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.