US Robotics 7931 Betriebsanweisung PDF herunterladen (Seite 247)

Chapter 8 Advanced Topics 223

directive, this file is archived to two drives in parallel. Segments 1, 3, 5, 7, and 9 are

archived using the first drive, and segments 2, 4, 6, 8, and 10 are archived using the

second drive.

Only segments that have been modified are archived. Up to four archive copies can

be made for each segment. Sun StorageTek SAM also supports volume overflow for

segments.

Note – The index of a segmented file contains no user data. It is considered

metadata and is assigned to the file system archive set.

Disaster Recovery

For information about recovering a segmented file in the event of a disaster, see the

Sun StorageTek Storage Archive Manager Troubleshooting Guide.

Using System Error Facility Reporting

The system error facility (SEF) reporting system captures log sense data from tape

devices in an automated library, writes it to a log file, and translates it into human-

readable form. It consists of the following:

■ A log file containing data from tape device log sense pages.

■ A command, sefreport(1M), for writing the log file to stdout in a

human-readable format. This log file can be used as input to a user-supplied

analysis script.

The log sense pages differ from vendor to vendor. For the meanings of the parameter

codes, control bits, and parameter values, see the vendor documentation for each

specific device.

SEF is not supported for stand-alone tape drives. SEF reporting is most useful for

older SCSI-2 devices that do not support the tapealert(1M) functionality. For more

information, see the tapealert(1M) man page.

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US Robotics 7931 Betriebsanweisung Seite 247