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Service Hints & Tips |
Document ID: RMIE-39NE9N |
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PC Server 520 - PCI RAID Drives DDD: Cable Instructions
Applicable to: World-Wide
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 in effective in bringing the DDD drive(s) back on-line.
Note:
This tip is for the PCI RAID Adapter. For the MicroChannel RAID Adapter, refer to Record H132397. The system may have run without problems for some time.
Problem Isolation Guidance:
- The system is a Server 520 PCI RAID Array 8641-EXX, 8641-MXX
- The system diagnostics do not fail.
- The RAID Administration program appears normal.
- More than one DASD Backplane is installed.
Also Refer To Record H131887 Regarding Multiple DDD Disks. To view this document double click here:- 
Fix:
Background:
The PCI F/W Streaming RAID Adapter (FRU 06H5078) uses two PCI SCSI signal cables and one DASD status cable to communicate with two SCSI bus channels.
The two SCSI signal cables (FRU 06H6876) attach to two separate edge connectors on the PCI RAID Adapter. Channel 1 is the edge connector closest to the system unit towards the external port. Channel 2 is the edge connector closest to the front of the system unit.
The DASD status cable (FRU 06H9343) is a two drop cable with two channel specific connectors. The connector at the end of the cable is Channel 1 and the connector in the middle of the cable is Channel 2.
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 DASD status cable connector are both attached to the same Backplane (are not crossed).
The location of the connectors on the PCI RAID Adapter are indicated on the diagram below:
PCI SCSI-2 FAST/WIDE STREAMING RAID CONTROLLER, FRU P/N06H5078
|_____________ _________ ______ _________ _________________
| |_______| ||CHANNEL 1|| ||CHANNEL 2|| | |
|| DASD STATUS | |
|| CONNECTOR _______ _______ _________ | |
| | | | | | | | |
|| |_____| |_____| | | | |
|| | | | |
|| _______ | | | |
|| | | |_______| | |
|| |_____| | |
| ____ _ __________________________|_|
|____| |||||||||||||||||| |||||
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SAS KEYWORDS:
SY2 SERVER 520 RAID
8641 PSY2ADPT PSY2PART P/N06H5078 P/N06H6876 P/N06H9343
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Search Keywords |
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Hint Category |
Hard Drives, Retain | |
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Date Created |
02-05-96 | |
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Last Updated |
12-01-99 | |
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Revision Date |
12-01-2002 | |
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Brand |
IBM PC Server | |
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Product Family |
PC Server 520 | |
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Machine Type |
8641 | |
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Model |
Various | |
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TypeModel |
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Retain Tip (if applicable) |
H133382 | |
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Reverse Doclinks |