SWXD3-SD

The SWXD3-SD is a 2.10 GB, 3.5-inch disk drive from the StorageWorks Building Block (SBB) series, compatible with SCSI-2 interface standards and approved for Novell NetWare.

Key Features & Performance:

• Capacity: 2.10 GB formatted.
• Access Times: Average read seek time of 9.9 ms, average latency of 5.5 ms, resulting in an average data-read access time of 15.4 ms (without cache). Average write seek time is 11.4 ms, yielding 16.9 ms average write access.
• Transfer Rates: Media transfer rates up to 5.4 MB/s, synchronous (8-bit) interface transfer up to 10 MB/s, and asynchronous (8-bit) up to 5 MB/s.
• Cache: Features a 256-KB segmented cache buffer (programmable from 1 to 16 segments, default 3 segments of ~80 KB each).
• Data Integrity: Employs 96-bit Reed-Solomon Error Correction Code (ECC) and 32-bit Error Detection Code (EDC) performed "on the fly" to detect and correct data errors.
• Technology: Uses a banded recording technique for constant bit density.
• Other Features: Supports asynchronous & synchronous data-transfer protocols, downloadable SCSI firmware, programmable sector size reallocation, tagged command queuing, background queue processing, self-diagnostics, and a FAST SCSI-2 interface. It boasts a 500,000-hour MTBF.

Operational Aspects:

• Spin-up: The SWXD3-SD has a modified circuit for automatic, staggered spin-up, where drives sequence power one at a time with a delay based on their SCSI address (each 12 seconds longer than the previous). This prevents excessive power supply loading and can be disabled if necessary.
• Identification: The generic internal model number is RZ28B, identifying as "DEC RZ28B" to SCSI driver software.
• Status Indicators: Front LEDs display status: green for activity (on/flashing when active) and amber for fault (on/flashing for errors).

Physical & Environmental:

• Dimensions: 41.1 mm (1.62 inches) high, 101.6 mm (4.0 inches) wide, 145.8 mm (5.74 inches) long.
• Weight: 0.93 Kg (2.1 lbs).
• Operating Conditions: Temperature 5°C to 50°C, humidity 8% to 80% non-condensing.
• Power Consumption: 10.8 W during typical operations, 8.6 W idle.