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Figure 3. ASUS Storage DS300i rear view
Dual Power Supplies
For a description of the LEDs, see pages 33 through 35.
All ASUS Storage enclosures include a mid-plane, RAID controller, power supply
unit, and enclosure processor all in one cable-less chassis design. Multiple fans
and optional power supplies provide redundancy to ensure continued usage
during component failure. The RAID controller is hardware based and controls all
logical drive functions transparently to the host system. ASUS Storage appears
to the computer's operating system as a standard SCSI drive.
Disk Drive Support
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3.5" x 1" SAS 3 Gb/s drives
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3.5" x 1" SATA 3 Gb/s drives
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Any combination of SAS and SATA drives in the same system.
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Hot-swappable drive bays.
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Staggered physical drive spin-up.
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Disk Data Format (DDF) enables drive roaming between subsystems.
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Multiple global or dedicated hot-spare drives with reversion option.
Controller Features
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Intel 81348 I/O Processor with:
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4 MB NOR flash memory.
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128 MB NAND flash memory for additional functions.
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128 KB 8-bit NVRAM.
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512 MB DDRII SDRAM DIMM expandable to 2GB with automatic write
cache destaging.
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Optional battery backup for SDRAM up to 72 hours.
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PMC PM8388 expander with 2 MB flash memory.
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Command Queue Depth: 1024 commands per subsystem.
Chapter 1: Introduction to ASUS Storage
SAS RAID Controller
3
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