- Sun Storage Virtual Tape Library VTL User Guide

236 VTL User Guide • May 2008 G • 96267
Case: Thebackupapplicationcannotseethedeviceatall
1. If the operating system sees the device but a backup application does not, check
the drivers for the backup software. Make sure the driver is appropriate for the
library and tape drive type.
2. If a driver appears to be inappropriate, refer to the backup software manual.
Some backup products recommend specific versions of drivers or special settings.
Apply the correct driver.
3. If changing the driver solves the problem, stop here.
4. If the recommended driver is installed or if installing it did not help, check the
driver version and upgrade as necessary.
5. If upgrading the driver solves the problem, stop here.
6. If the driver is correctly versioned or if upgrading the driver does not help, look
for application software conflicts. Multiple backup products on a single server can
cause this sort of problem.
Case: Thebackupsoftwaredo esnotseethedeviceintheexpectedplace
1. If the operating system correctly recognizes the device, but the backup software
does not see the device in the expected place, suspect a serialization error in the
application. Consult the application vendor and documentation, and install
applicable software patches or upgrades.
Serializationconvertsobjectsintostreamsofsequentialobjectproperties.Ifthe
applica ti o nmisi nterp rets thesequence,itmayconfu s e propertiessuchas
ownership.
Issue: Clientseestheta p elibr ary/drivebutcannotaccessit
Indications: Aclientoperatingsystemorapplicationcannotacc e ss virtualdevices.
Diagnostics: Furthercharacterizetheproblem,anddeterminethecause.
Case: Neithertheoperatingsystemnorapplicationsappeartohaveaccess
1. Obtain an operating system-specific raw device utility that can access tape drives.
■ MicrosoftWindowsclientscanusentutiltocheckemulatedIBMUltrium
devices.
■ UNIXsystemscanusethemtortarcommandtoaccessthetapedevice
(usingasyntaxlik e
mt -f /dev/rmt/0 status).
2. Stop the backup application.