Tandberg Data VXA-320 (VXA-3) Performance Specifications, Data Transfer Rates, Read a, b, Buffer

CHAPTER 7 SPECIFICATIONS

PERFORMANCE SPECIFICATIONS

This section describes the performance specifications for the tape drive. The tape drives are factory tested to these specifications using VXAtape XTape media.

DATA TRANSFER RATES

Table 7-2lists the data transfer rates that the High-density, LVD tape drive can achieve.

Table 7-2Data transfer rates in megabytes per second
Read a, b		Write a, b		Burst transfer rate
VXA-3 Format	VXA-2 Format	VXA-3 Format	VXA-2 Format	VXA-3 Format	VXA-2 Format
12.0 MB/secc	6.0 MB/sec	12.0 MB/sec	4.5 MB/sec	160 MB/sec	160 MB/sec

aHost matching.

bWhen attached to a High-density LVD SCSI bus. All sustained data rates are dependent on the capabilities of the SCSI bus (for example, an Ultra2 SCSI bus is limited to less than 40 MB/second).

cOne megabyte equals 1,000,000 bytes.

READ AND WRITE SPECIFICATIONS

Table 7-3provides read and write specifications for the VXA-320 tape drive.

Table 7-3Read and write specifications

Backward compatibility with	ƒ Reads and writes VXA XTape written by a VXA-2 tape drive.
VXA-1 and VXA-2 tape drivesa	ƒ Recognizes, then ejects VXA-1 formatted tapes.
	ƒ Recognizes, then ejects VXAtape V6, V10, and V17 b.
Compression	ALDC (Adaptive Lossless Data Compression)
Bit error rate	Less than 1x10 –17
Partitions	2
Buffer	8 megabytes (MB)
Error detection and correction	4 layer Reed Solomon
Format	Discrete Packet Format
Heads (8)	ƒ	4 write heads
	ƒ	4 read/write check/read heads
Data media	ƒ	VXAtape cartridges with Advanced Metal Evaporated (AME) media.
		The tape drive ejects other types of media.
	ƒ	No formatting or conditioning required prior to use.
	ƒ	30-year archival life.

aThe VXA-320 (VXA-3) tape drive can read or write VXA-2 formatted V23, X23, X10, or X6 tapes.

bThe VXA-320 (VXA-3) tape drive does not support VXAtape V6, V10, or V17.

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PRODUCT MANUAL 433689-01