HP StorageWorks EBS with HP OpenView Storage Data Protector V5.1 Implementation Guide (October 2003)

Installation and Configuration
26 EBS with HP OpenView Storage Data Protector v5.1 Implementation Guide
Tape Drive
The tape drive is the fifth piece in determining backup and restore performance.
HP tape drives have varying levels of performance. Factors such as file size (larger
is better), directory depth, and data compressibility all affect system performance.
Data interleaving during backup also affects restore performance. Use of the
router and its connections to HP StorageWorks tape libraries is a simple way to
scale backup performance.
Table 3 shows performance information for various tape drives.
Performance Assessment Tool
Additionally, the Performance Assessment Tool (PAT) can assist in evaluating
local disk and network storage performance of Microsoft Windows based systems.
It can help identify potential system limitations that could interfere with achieving
expected tape backup performance.
PAT accesses the file systems in ways comparable to the operation of tape backup
software. The performance assessment does not precisely model any specific
backup application. It does provide an indication of how fast data can be read
from storage on the system under test. This allows matching of the system to the
appropriate performance class tape backup solution.
Table 3: Tape Drive Throughput Speed (native)
Tape Drive Throughput MB/s
Ultrium 460 30
Ultrium 230 15
SDLT 160/320 GB 16
SDLT 110/220 GB 11
DLT8000 40/80 GB 6