IBM ServeRAID-4 Ultra160 Series, User Reference

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Feature ServeRAID-4H ServeRAID-4M ServeRAID-4Mx ServeRAID-4L ServeRAID-4Lx
Supported RAID levels 0, 1, 5,
Enhanced-1
(1E), and
Enhanced-5
(5E), 00, 10,
1E0, 50 0, 1, 5,
Enhanced-1
(1E), and
Enhanced-5
(5E), 00, 10,
1E0, 50 0, 1, 5,
Enhanced-1 (1E),
and Enhanced-5
(5E), 00, 10, 1E0,
50 0, 1, 5,
Enhanced-1
(1E), and
Enhanced-5
(5E), 00, 10,
1E0, 50 0, 1, 5,
Enhanced-1 (1E),
and Enhanced-5
(5E), 00, 10,
1E0, 50
System PCI data bus 64 bit at 33
MHz 64 bit at 33
MHz 64 bit at 33 to 66
MHz 64 bit at 33
MHz 64 bit at 33 to 66
MHz
Connector locations
This section provides illustrations of the SCSI channel connectors and cable
connectors for the ServeRAID-4H, ServeRAID-4M, ServeRAID-4Mx, ServeRAID-4L,
and ServeRAID-4Lx controllers.
The light-emitting diodes (LEDs) on the controllers indicate activity on the SCSI
channels and provide diagnostic information for trained service technicians.
ServeRAID-4H controller
The ServeRAID-4H controller has four independent SCSI channel connectors:
Channel 1, Channel 2, Channel 3, and Channel 4. Each of these SCSI channels
supports up to 15 physical devices.
Note: The battery-backup cache protects the data being stored in the ServeRAID
cache memory during a power outage or failure when using the write-back
mode.
You can attach internal SCSI devices to the internal Channel 1 and Channel 2
connectors. You can attach external SCSI devices to the external Channel 1,
Internal Channel 2
Internal Channel 1
Battery for Backup Cache
External Channel 1
External Channel 2
External Channel 3
External Channel 4
Figure 1. ServeRAID-4H controller
4
IBM
®
User’s Reference: ServeRAID
™
-4 Ultra160 SCSI Controller