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 |
x-1092-SRM-00-03-EN