Troubleshooting Windows 95 Backup
This article was previously published under Q130946
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This article describes troubleshooting tips that you can use for MicrosoftBackup.
Tape Drive Not DetectedVerify that the tape drive you are using is supported by Microsoft Backup.For information about supported tape drives in Backup, see the followingarticle in the Microsoft Knowledge Base:
124730 Tape Backup Units Supported in Windows 95
Problems Restoring FilesIf you experience a problem restoring files, follow these steps:
- Refer to your tape backup unit's documentation for the proper cleaning instructions, then clean the tape drive.
- Set your computer to a slower speed (for example, turn off turbo mode).
- Try to restore the files in Safe mode. You can start Windows 95 in Safe mode by pressing F5 at the "Starting Windows 95" message or by pressing F8 at the "Starting Windows 95" message and then choosing Safe Mode from the Startup menu.
NOTE: If the tape backup drive requires the existence of a protected- mode driver, it will not work in Safe mode. For example, Colorado Trakker drives do not work in Safe mode because VCOMM does not load.
- Try to restore the files on a different computer.
- Verify that there is enough swap file space. The size of the swap file grows with the number of files involved in the backup, restore, or compare operation.
Problems Backing Up or Restoring Over the NetworkIf you cannot back up or restore files over a network, try a differentnetwork protocol, or try to copy a large file across the network withthe XCOPY command. This problem is usually related to the network ornetwork configuration and not Microsoft Backup.
Tape Cannot Be FormattedIf the tape cannot be formatted, try these steps:
- Verify that you are using a compatible tape format. For example, you cannot format a 3010 tape in a QIC-80 drive and you cannot format a QIC-80 wide tape in a QIC-80 drive.
- The tape may be bad or worn out. Try to format a different tape.
NOTE: While it may be possible to format the tape by degaussing (or bulk-erasing) the tape, this will not correct or repair a damaged tape. There are two reasons why you may be able to format a degaussed tape:
- The bad block count (which is stored in the header of the tape) is set to zero.
- The bad blocks appear to be corrected, so that the tape works until the bad blocks are detected again. If you use such a tape, you may encounter errors again, or you may not be able to recover data after performing a backup, since data may be stored in a bad block on the tape.
- Try to format the tape in Windows 95 Safe mode. You can start Windows 95 in Safe mode by pressing F5 at the "Starting Windows" message or by pressing F8 at the "Starting Windows" message and choosing "Start Windows, bypassing startup files" from the Windows 95 Startup menu.
NOTE: If the tape backup drive requires the existence of a protected- mode driver, it will not work in Safe mode. For example, Trakker drives do not work in Safe mode because VCOMM does not load.
- There may be a video DMA conflict. Start the format operation, then try the following steps:
- Minimize the progress indicator. If formatting still fails, try step B.
- Change the video resolution to 640 x 480 x 16 colors. If formatting still fails, try step C.
- Try formatting the tape in a full-screen MS-DOS command prompt session. If this works, use Device Manager to look for a DMA conflict between the video card and the floppy drive controller.
Tape DespoolsIf tapes you use in your tape drive frequently despool, the end-of-tapesensor in your tape drive may be dirty or damaged. The end-of-tape sensordetects the end of a tape by projecting light through a series of holesnear the end of the tape. If the bulb used to project this light is dirtyor is damaged, the light may not be strong enough to project through theholes. This prevents the drive from accurately determining when the end ofthe tape has been reached.
Many drive manufacturers recommend cleaning the end-of-tape sensor afterevery eight hours of drive operation, when excessive dust or other debrisaccumulates on the sensor, or when a tape used in the drive becomesdespooled. For information about cleaning the end-of-tape sensor in yourtape drive, refer to the documentation that came with the drive, orcontactthe drive manufacturer.
Tape Comparison FailsIf the tape comparison fails, try the following steps:
- Bulk-erase the tape.
- Try a new tape.
Cannot Access Tape Drive and Backup Stops RespondingIf Backup is unable to access the tape drive and appears to stopresponding (hang), there may be a resource conflict between IDE devices inyour computer. For example, your Syquest removable drive may be configuredto use the same resources as your tape drive.
To resolve this behavior, please see the following articles in theMicrosoft Knowledge Base:
133240 Troubleshooting Device Conflicts with Device Manager
153471 Problems with Removable IDE Drives in Windows 95
153471 Problems with Removable IDE Drives in Windows 95
Colorado Trakker Tape Backup UnitIf you are experiencing random problems with a Trakker tape drive on aparallel port, make sure the parallel port is not configured in thecomputer's CMOS settings as an ECP or EPP port. If it is, use thecomputer's CMOS Setup utility to reconfigure the port to a standardparallel port. For more information about the computer's CMOS Setuputility, please consult your computer documentation or manufacturer.
Iomega QIC-80 Tape Backup DrivesIomega Technical Support states that these drives require new drivers fromIomega. You may also need to verify that the following line exists in theConfig.sys file:
Buffers=30For additional information, please contact Iomega Corporation.
Additional Troubleshooting StepsIf you continue to have problems with Backup, follow these steps:
- Refer to the tape backup unit's documentation for the proper cleaning instructions, then clean the tape drive.
- Verify that all of the power connections are securely and properly attached.
- Verify that the jumpers are set in a compatible mode (please refer to the tape backup unit's documentation for the proper settings).
- If you have an internal tape drive, position it as far as possible from the hard disk. If you have an external tape drive, position it as far as possible from the monitor.
Article ID: 130946 - Last Review: 01/09/2015 05:16:07 - Revision: 1.1
Microsoft Windows 95
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