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Compaq DAT AutoLoader Reference Guide
Compaq Confidential – Need to Know Required
Writer: Debbie McRill Project: Compaq DAT AutoLoader Reference Guide Comments:
Part Number: 326817-003 File Name: e-ch4 Operation.doc Last Saved On: 12/20/99 2:35 PM
If the host sends an UNLOAD command (LOAD/UNLOAD with the LOAD
bit set to 0), the same procedure is completed, but the magazine is not ejected
at the end.
If you press the Eject button during the 30 seconds when the DAT
AutoLoader checks magazine positions following insertion of a magazine, the
magazine is ejected immediately, even if Medium Removal Prevention is in
force.
If the host has previously sent a PREVENT MEDIA REMOVAL command,
the unloading action is different in two ways:
■
The Eject button is disabled and has no effect. It does not initiate an
unload sequence.
■
An UNLOAD command puts the drive into a semi-loaded state. It takes
the drive offline and unthreads the tape, but does not eject it.
The effects of PREVENT MEDIA REMOVAL continue until an ENABLE
MEDIA REMOVAL command is received, or the drive is reset.
Forcing Cassette Ejection
CAUTION:
You can lose data if you force ejection of a tape. The tape may also
end up invalidly formatted because EOD (End of Data) may not have been
written. Force ejection only as a last resort to recover a cassette. Never use it as
a quick way of ejecting a cassette.
If you press the Eject button when the drive is busy, it may be a long time
before the drive responds to the request, because it is finishing the task it is
performing first. This method ensures that the task is terminated in a
controlled manner, and no data is lost.
However, if you need to unload a cassette urgently, even at the risk of losing
data, you must force ejection as follows:
1.
Hold the Eject button down for at least 5 seconds. The LCD displays
“Force Eject.”
2.
The DAT AutoLoader waits 35 seconds to give the normal ejection
procedure a chance to occur.
3.
Once this time has elapsed, if there is a tape loaded in the drive, it is
immediately unthreaded and the cassette is ejected, regardless of what
operation the drive was performing. The cassette is then returned to its
position in the magazine, and the drive is reset as though the power has
been cycled.
- Compaq DAT AutoLoader 1
- Third Edition (January 2000) 2
- Part Number 326817-003 2
- Contents 3
- Chapter 2 4
- Chapter 3 4
- Chapter 4 4
- Chapter 5 5
- Chapter 6 5
- Appendix A 5
- Appendix B 5
- Appendix C 6
- About This Guide 7
- Symbols in Text 8
- Symbols on Equipment 8
- Rack Stability 9
- Getting Help 10
- Overview 11
- Features 12
- The SCSI Interface 13
- Reliability of Backup Devices 13
- Capacity 14
- Cassette Formats 15
- DDS Logo Media 16
- Write-Protecting a Cassette 17
- Life Expectancy of Cassettes 17
- Installation 19
- Table 2-1 20
- Hardware Settings 20
- Switch Settings 21
- Table 2-3 22
- Table 2-4 23
- Data Compression Definitions 23
- Preparing the Computer 24
- Installing the DAT AutoLoader 24
- Reassembling the Computer 26
- Completing the Installation 28
- Installing Software Drivers 29
- Microsoft Windows NT 30
- Novell NetWare 31
- ASPI Support 31
- Compaq Tru64 UNIX 32
- SCO OpenServer 32
- Table 3-3 33
- SCO UnixWare 34
- SunSoft Solaris 35
- Banyan VINES 36
- Operation 37
- Eight-Cassette Configuration 39
- Seven-Cassette Configuration 40
- Single-Cassette Configuration 40
- Loading the Magazine into the 42
- AutoLoader 42
- Removing the Cassettes from 42
- Ejecting the Magazine 43
- Forcing Cassette Ejection 44
- Modes of Operation 45
- Front Panel 46
- Liquid Crystal Display (LCD) 47
- LCD Messages 48
- Table 4-1 50
- LCD Menu Screens 52
- Table 4-2 53
- Cleaning 54
- Errors Resulting from 55
- Cleaning Neglect 55
- Importance of Compaq-Approved 56
- Tape Cassettes 56
- DAT AutoLoader Cleaning 56
- Recommendations 56
- Stacker Mode 57
- Random Mode 57
- Troubleshooting 58
- Software 59
- Installation Troubleshooting 60
- For Tru64 Unix 61
- For Novell NetWare 61
- For SCO OpenServer Systems 62
- Resolving Operating Problems 63
- Resolving Magazine Problems 63
- Regulatory Compliance Notices 65
- Class B Equipment 66
- Modifications 67
- European Union Notice 68
- Japanese Notice 69
- Taiwanese Notice 69
- Electrostatic Discharge 70
- Grounding Methods 71
- Specifications 72
- Power Requirements 73
- Air-Cooling Requirement 73
- Suspended Particulate 74
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