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PRODUCT MANUAL 433689-01
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.
D
ATA TRANSFER RATES
Tab le 7- 2 lists the data transfer rates that the High-density, LVD tape drive can
achieve.
READ AND WRITE SPECIFICATIONS
Tab le 7- 3 provides read and write specifications for the VXA-320 tape drive.
Table 7-2 Data 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/sec
c
6.0 MB/sec 12.0 MB/sec 4.5 MB/sec 160 MB/sec 160 MB/sec
a
Host matching.
b
When 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).
c
One megabyte equals 1,000,000 bytes.
Table 7-3 Read and write specifications
Backward compatibility with
VXA-1 and VXA-2 tape drives
a
Reads and writes VXA XTape written by a VXA-2 tape drive.
Recognizes, then ejects VXA-1 formatted tapes.
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)
4 write heads
4 read/write check/read heads
Data media
VXAtape cartridges with Advanced Metal Evaporated (AME) media.
The tape drive ejects other types of media.
No formatting or conditioning required prior to use.
30-year archival life.
a
The VXA-320 (VXA-3) tape drive can read or write VXA-2 formatted V23, X23, X10, or X6 tapes.
b
The VXA-320 (VXA-3) tape drive does not support VXAtape V6, V10, or V17.