Nortel DMS-10 - Recovery; Sequence Numbering Corrected

20 Guide to Index Corruption Recovery
297-6201-501 97Q3 Standard 02.01 July 1997
Recovery
To recover from this error, version 108 must be changed from TO POLL
data to TO DLET data and the data retrieved from it in a DEMAND POLL.
After the data center retrieves the data via demand poll, the old index
(which contains the corrupt version 108) will be deleted, then a new index
will be built starting with version 109 (which is not corrupt).
1. Delete the corrupt TOL index file.
2. Create a temporary TOL index that includes the corrupt TOLCRD file.
This forces the corrupt version into TO DLET status.
3. Display the closed TOLCRD files in the index.
4. Data center does a DEMAND POLL on the unpolled data in the corrupt
version.
5. Delete the temporary TOL index file.
6. Create a new TOLIDX file starting with the first good sequence number
containing data TO POLL.
7. Delete the TOLCRD files that were forced into TO DLET status.
8. Display the closed TOLCRD files in the new index.
Graphically, the solution can be represented as shown in the following
diagram.
Figure 7
Sequence numbering corrected
1. To delete the corrupt TOL index file, enter the following command at
the maintenance terminal:
>DELETE TOLIDX 1:255 (cr)
System response:
VERSION 03 DELETED
2. Create a temporary TOL index that includes the corrupt TOLCRD file.
This forces the corrupt version into TO DLET status. Create a tempo-
rary TOL index file, starting at version 106 (which is already marked as
TO DLET) and ending at version 109 (version 109 will become the first
version having TO POLL data.). The effect is that the TOL data in ver-
sion 108 will be changed from data TO POLL to data TO DLET (ver-
sions 106 and 107 are already data TO DLET, so they won’t be
affected.). Enter the command (at the terminal):
>GETIDX106:109.T (cr)
System response:
TOL FILE ESTABLISHED
New TOLIDX File
VS 106 (TO DLET)
VS 107 (TO DLET)
VS 108 (TO DLET)
VS 109 (TO POLL)
VS 110 (TO POLL)
VS 111 (TO POLL)
VS 112 (TO POLL)
TOLCRD Files
VS 106
VS 107
VS 108
VS 109
VS 110
VS 111
VS 112