# IBM ServeRAID-3 hardware features

The following table lists the hardware features for the IBM ServeRAID-3 controllers:

Feature | ServeRAID-3HB | ServeRAID-3H | ServeRAID-3L
--- | --- | --- | ---
Arrays (max.) | 8 | 8 | 8
Battery-backup cache | Yes | Optional | No
Cache memory | 32 MB | 32 MB | 4 MB
Hard disk drives (max.) | 45 | 45 | 15
Logical drives (max.) | 8 | 8 | 8
Microprocessor | 40 MHz | 40 MHz | 25 MHz
SCSI channels | 3 | 3 | 1
SCSI transfer speed (max.) | 80 MB per sec. | 80 MB per sec. | 80 MB per sec.
Supported RAID levels | 0, 1, 5, Enhanced-1 (1E), and Enhanced-5 (5E) | 0, 1, 5, Enhanced-1 (1E), and Enhanced-5 (5E) | 0, 1, 5, Enhanced-1 (1E), and Enhanced-5 (5E)
System PCI data bus | 64 bit | 64 bit | 32 bit

Glossary | Contents

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