Guide to Index Corruption Recovery 17
BMC II BISYNC Quick Reference Guide
In the example above, 81 is the TOLCRD file version number, 000000
is the beginning block number of the version, and 003451 is the number
of blocks in the version. Adding 000000 and 003451 should give you
the beginning block number of the next version (003451).
Recovery
The TOL index must be rebuilt to “close the gap” caused by the missing
index entry. Note that the TOLCRD files versions are sequential and
contiguous. They start at version 81, increment to version 82, then to
version 83. This indicates that the TOL index file corruption can be fixed.
1. Identify the next sequence number of TO POLL in the index.
2. Delete the old TOL index file.
3. Create a new index file starting with the first block of TO POLL just
located.
4. Display the summary of TOLCRD files in the new index.
5. Display the closed TOLCRD versions in the new index.
Graphically, the solution can be represented as shown in the diagram
below:
Figure 5
Version number recovered
1. Identify the next sequence number of TO POLL in the index. Using the
information from the previous FILET command, it can be seen in the
system response listed below that the first block of TO POLL data is
block number 3445 in TOLCRD version 81.
TOL FILE: 03 VSNS, 003487 BLKS, 000042 TO POLL
SEQ: 000000 FIRST, 003445 PRIM, 003487 NEXT IN
VS 81: 3451, 6 TO POLL, TOL SEQ :000000
2. To delete the old TOL index file, enter the following command:
>DELETE TOLIDX 1:255 (cr)
System response:
VERSION 03 DELETED
3. Create a new index file starting with the first block of TO POLL data
just located. Create a new TOL index file, starting with TOLCRD file
version 81, and starting at the first block of TO POLL data in version 81
(block 3445). Enter the command (at the terminal):
>GETIDX81:3445.T (cr)
System response:
TOL FILE ESTABLISHED
GOOD TOLIDX FILE
VS 84 (TO POLL)
VS 83 (TO DLET)
VS 82 (TO DLET)
VS 81 (TO DLET)
New TOLIDX File
vs 81
vs 83
vs 84
vs 82
TOLCRD Files
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