Mylex DAC960PG, Installation Manual

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Product Description
1-2 DAC960PG Installation Guide
• Scatter/gather for additional command efficiency
• Hot standby disk support— a drive is ready to take over if a drive in
the array should fail
• Automatic sector remapping for recovery of and protection against
defective media
• User definable rebuild priority
• SMART capable drive support for predictive failure analysis
• SAF-TE fault/status management support
• Support for tape and CDROM devices
This controller supports 1, 2, or 3 wide Ultra-SCSI channels and uses a
Mylex BA-81C15 SCSI interface chip on each channel. A 33Mhz Intel
80960 RP processor is used to off-load on-board CPU functions from the
host computer’s main CPU. The RP version of the i960 contains a bridge
between the host (primary) PCI bus and a secondary PCI bus, which
interfaces with up to 3 SCSI buses via the BA-81C15 chip(s).
The DAC960PG firmware resides in flash EEPROM. When the system is
started, the firmware is copied into RAM and executed from there. The
firmware supports RAID levels 0, 1, 0+1, 3, 5, and JBOD (Mylex RAID 7).
The DAC960PG supports disk caching with up to 128 MB of Extended Data
Out (EDO) RAM. The cache is controlled by a MYL-86138 RAID
Coprocessor ASIC, which handles ECC (Error Correction Code).
m
Caution
The only cache memory supported on the DAC960PG
is EDO ECC RAM. The EDO ECC RAM module
used must be from a Mylex qualified vendor list. Non-
Mylex supplied RAM modules are not supported.