Troubleshooting
Problem
This section contains important information on the controller features and connector locations. Controller features Standard features of the ServeRAID-4M controller are as follows.
Resolving The Problem
This section contains important information on the controller features and connector locations.
Controller features
Standard features of the ServeRAID-4M controller are as follows.
| Feature | ServeRAID-4M |
|---|---|
| Arrays (max.) | 8 |
| Battery-backup cache | Yes |
| Cache memory | 64 MB |
| Hard disk drives (max.) | 30 |
| Logical drives (max.) | 8 |
| Microprocessor | 100 MHz |
| SCSI channels | 2 |
| SCSI transfer speed (max.) | 160 MB per sec. |
| Supported RAID levels | 0, 1, 5, Enhanced-1 (1E), and Enhanced-5 (5E), 00, 10, 1E0, 50 |
| System PCI data bus | 64 bit at 33 MHz |
Connector locations
This section provides illustrations of the SCSI channel connectors and cable connectors for the ServeRAID-4M controller.
The light-emitting diodes (LEDs) on the controllers indicate activity on the SCSI channels and provide diagnostic information for trained service technicians.
SCSI channel connectors
The ServeRAID-4M controller has two independent SCSI channel connectors: Channel 1 and Channel 2. Each of these SCSI channels supports up to 15 physical devices.
You can attach internal SCSI devices to the Channel 1 and Channel 2 connectors. You can attach external SCSI devices to the Channel 1 and Channel 2 connectors.
NOTE: The ServeRAID-4M controller does not support configurations that use both the internal and external connectors on the same channel concurrently. For example, you cannot use both external Channel 1 and internal Channel 1.
NOTE: The ServeRAID-4M controller uses the module (P/N 38L3386) containing a lithium battery.
CAUTION:
When replacing the lithium battery, use only IBM Part Number 38L3386 or an equivalent type battery recommended by the manufacturer. If your system has a module containing a lithium battery, replace it only with the same module type made by the same manufacturer. The battery contains lithium and can explode if not properly used, handled, or disposed of.
Do not:
- Throw or immerse into water.
- Heat to more than 100 C (212 F)
- Repair or disassemble
Dispose of the battery as required by local ordinances or regulations.
Document Location
Worldwide
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Document Information
Modified date:
28 January 2019
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ibm1MIGR-4R3SMN