7-19
Using Mass Storage Devices
DDS Tape Drive and Data Cassette Descriptions
If the LED indicators on your DDS-format drive display the Media Wear
(Caution) condition, follow this procedure:
1
Check the system console for any tape error messages. A hard error during
a read or write operation may have occurred.
2
Clean the heads with a cleaning cassette (HP92283K) as described in
“Cleaning the Tape Heads,” later in this chapter.
3
Repeat the operation you performed when the Media Wear (Caution) sig-
nal displayed. If the Media Wear (Caution) signal still displays, then the
data cassette should be replaced.
4
If you are performing a backup from disk to tape, discard the data cassette
and back up your files using a new data cassette.
5
If you are performing a restore from tape to disk, complete the restore,
back up the files to a new data cassette, then discard the data cassette.
Data Cassettes
Media Life
HP DDS data cassettes are currently specified to 2000 passes over any part
of the tape under optimal environmental conditions (50% relative humidity,
22 degrees C). During a tape operation, any one area of the tape may have
multiple passes over the heads. This translates into approximately 200 to 300
backups or restores.
Under certain conditions, the life of your data cassette is less. Replace your
data cassettes after 100 backups or restores if your operating conditions meet
any of the following criteria:
•
The relative humidity in your operating environment is consistently less
than 50%.
•
You know that the backup software you are using makes multiple passes
over sections of the tape during backups or restores.
•
You notice that when you do backups and restores the tape stops and starts
frequently.
Summary of Contents for 748 Series
Page 10: ...x Contents ...
Page 11: ...xi Preface ...
Page 16: ...xvi ...
Page 17: ...1 1 1 Product Description ...
Page 24: ...1 8 Product Description Conversion Cables ...
Page 25: ...2 1 2 Power Budget ...
Page 26: ...2 2 Power Budget This chapter discusses the power budgeting for the Model 748 workstation ...
Page 37: ...3 1 3 VME Card Installation ...
Page 44: ...3 8 VME Card Installation Installing VME Accessory Card Hardware ...
Page 45: ...4 1 4 EISA Card Installation ...
Page 52: ...4 8 EISA Card Installation Hardware Installation ...
Page 53: ...5 1 5 PCI Card Installation ...
Page 62: ...5 10 PCI Card Installation Hardware Installation ...
Page 63: ...6 1 6 Installing and Configuring Mass Storage Devices ...
Page 76: ...6 14 Installing and Configuring Mass Storage Devices Configuring for a Hard Disk Drive ...
Page 77: ...7 1 7 Using Mass Storage Devices ...
Page 112: ...7 36 Using Mass Storage Devices Ordering Information ...
Page 113: ...8 1 8 Connecting Cables ...
Page 116: ...8 4 Connecting Cables ...
Page 117: ...9 1 9 Power On Power Off ...
Page 121: ...10 1 10 Dealing With Problems ...
Page 132: ...10 12 Dealing With Problems Dealing with Network Failures ...
Page 133: ...A 1 A Safety and Regulatory Statements ...
Page 135: ...A 3 Safety and Regulatory Statements Declaration of Conformity Declaration of Conformity ...
Page 143: ...A 11 Safety and Regulatory Statements Warnings and Cautions Warnings and Cautions ...
Page 144: ...A 12 Safety and Regulatory Statements Warnings and Cautions ...