6.312 bytes |
Service Hints & Tips |
Document ID: MCGN-3XGFPW |
Servers - Multiple DDD drives caused by incorrect channel mapping
Applicable to: Canada, United States
Symptom
After one drive becomes DDD, one or more other drives will appear to be in a DDD drive state.
Problem Isolation Aids
All of the following must be true for this TIP to apply:
The System is any model PC Server Type 8640, 8641, 8642, 8650, 8651, that supports and is configured with a Type II or a Type III Hot Swap backplane(s) AND / OR has a attached external enclosure Type 3518.
The System is configured one of the following Adapters / Controllers that supports the internal Hot-swap Bays and / or external enclosure(s) listed above:
Option P/N |
FRU | |
ServeRAID Adapter |
70G8489 |
06H9334 |
ServeRAID Adapter |
70G8489 |
76H6875 |
ServeRAID II Adapter |
76H3584 |
76H3587 |
ServeRAID II Onboard Controller |
Integrated |
Integrated |
System Diagnostics pass.
ServeRAID / ServeRAID II diagnostics pass.
Fix
Note: all further references to "Bank" or "Banks" represents those internal to the System and / or those located in a System-connected External Enclosure.
Ensure the Channel-bank mapping correctly reflects the SCSI cabling of the ServeRAID / ServeRAID II Adapter / Controller to the Hot-Swap backplane(s) as follows:
1. Examine and NOTE the actual SCSI cabling of the ServeRAID / ServeRAID II Adapter / Controller to the internal Hot-Swap backplane(s) internal to the System and / or in the System-connected External Enclosure.
Example
Ch1 on the ServeRAID goes to Bank E
Ch2 on the ServeRAID goes to Bank D
Ch3 on the ServeRAID goes to Bank C
2. Ensure the ServeRAID / ServeRAID II Adapter / Controller is configured to map the SCSI Channels (the same as the physical cabling) using the following procedure:
Boot the System to the IBM ServeRAID and ServeRAID II diskette
Choose option 7 Advance Functions
Choose option 8 "Display/Change Adapter Params"
Choose option 5 "Set Channel -> Bank Mapping"
Using the same example (as in step 1), the Channel-Bank mapping should be set as follows:
CHANNEL - > BANK MAPPING
LOW ID HIGH ID LOW (REVERSE) HI (REVERSE) | |
CH 1 |
:E |
CH 2 |
:D |
CH 3 |
:C |
Ensure the Channel-Bank Mapping reflects the actual physical SCSI cabling (as was NOTED in step 1).
SAS KEYWORDS:
PSY2, D/T8640, D/T8641, D/T8642, UNCLASSIFIED, SERVERAID, SERVERAID II, CHANNEL, BANK, MAPPING, D/T8650, D/T8651, DDD, MULTIPLE, H093980
Search Keywords |
| |
Hint Category |
Hard Drives, RAID, Retain | |
Date Created |
18-08-98 | |
Last Updated |
11-02-99 | |
Revision Date |
11-02-2000 | |
Brand |
IBM PC Server | |
Product Family |
Netfinity 7000, PC Server 320, PC Server 330, PC Server 704, PC Server 720, Rack/Storage Enclosures, ServeRAID | |
Machine Type |
8651, 8640, 8650, 8642, 3518, 8641, 8644, Various | |
Model |
Various | |
TypeModel |
| |
Retain Tip (if applicable) |
H093980 | |
Reverse Doclinks |
Date last altered: A98/08/07 |