IBM ServeRAID-4 hardware features

The following tables list the hardware features for the IBM ServeRAID-4 controllers:

 
Feature ServeRAID-4H ServeRAID-4Mx ServeRAID-4Lx
Arrays (max.) 8 8 8
Battery-backup cache Yes Yes No
Cache memory 128 MB 64 MB 32 MB
Hard disk drives (max.) 60 30 15
Logical drives (max.) 8 8 8
Microprocessor 266 MHz 100 MHz 100 MHz
SCSI channels 4 2 1
SCSI transfer speed (max.) 160 MB per sec. 160 MB per sec. 160 MB per sec.
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
System PCI data bus 64 bit at 33 MHz 64 bit at 33 to 66 MHz 64 bit at 33 to 66 MHz

Feature ServeRAID-4M ServeRAID-4L
Arrays (max.) 8 8
Battery-backup cache Yes No
Cache memory 64 MB 16 MB
Hard disk drives (max.) 30 15
Logical drives (max.) 8 8
Microprocessor 100 MHz 100 MHz
SCSI channels 2 1
SCSI transfer speed (max.) 160 MB per sec. 160 MB per sec.
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
System PCI data bus 64 bit at 33 MHz 64 bit at 33 MHz


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