DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1519STO-DATA (Stored Data)
9
Save commands
Whenever a
save translation
or
announcements
is executed, the files on disk
are newer than the files on tape until a
backup disk
is performed either by
command or by daily scheduled maintenance. If
test stored-data
is run before a
backup, Tests #833 and #834 will fail with error code 1 or 8, generating a warning
alarm against STO-DATA. Once a disk backup is performed, running the stored
data tests will clear the alarm. A copy command can be used instead of backup
to save time; take extra care to enter the right options so good files are not lost.
When
save translation tape
or
save announcements tape
is executed,
timestamps on the tape files will be newer than those on the disk files. (This is the
opposite of normal operational sequences.) These commands should not be
used as part of standard administration or repair procedures. When the files are
in this state, automatic or demand incremental backups from disk will be
prevented from overwriting the tape files, and subsequent STO-DATA tests will
fail, generating warning alarms.
Save to tape commands may be useful when the disk has failed and the tape is
being used temporarily for primary storage. Once the disk is replaced,
restore
disk
can be used to recoordinate the files.
Dirty Files
Two copies of each file are stored on each MSS device. This protects against
data loss in case a failure occurs while data is being written. If such a failure
occurs, or if a tape cartridge is pulled out of the drive while data is being written
to it, the incomplete file is marked as a ‘‘dirty’’ file. The system will then use the
other copy for reading data and will generate a minor alarm against TAPE or
DISK. AS long as one of the copies is clean, STO-DATA tests will test the clean
copy and not report any errors.
Tape Replacement
Tape cartridges are periodically replaced (for example, after a TAPE warning
alarm with error type 2305, indicating that 90% of its useful life has been
exceeded). Until a full disk backup is performed, the new tape will be
inconsistent with the disk.
Inconsistent Files: Solutions
The best way to clear STO-DATA alarms is to perform a save translation or
announcements (if those files are affected), followed by a backup disk. Daily
scheduled maintenance also performs this sequence. There are unusual
situations in which other actions are required. If problems exist on the TN750
Announcement circuit pack, avoid saving announcements until resolving those
problems. Otherwise, good copies of the files could be overwritten by bad ones.
