Nortel DMS-10 Series Quick Reference Manual page 37

Guide to Index Corruption Recovery 27
3. Display the closed AMACRD files in the index. Displaying the closed
AMACRD files in the index shows that version 108 has been changed
from PRIMARY to SECNDRY AMA. Enter the command (at the ter-
minal):
>IDXMAINT DIR CLOSED AMA 200 (cr)
System response:
VS 106: 2968 BLKS, 99 DA SECNDRY, AMA SEQ #602747
VS 107: 1698 BLKS, 99 DA SECNDRY, AMA SEQ #605715
VS 108: 1335 BLKS, 99 DA SECNDRY, AMA SEQ #607413
VS 109: 1389 BLKS,
VS 110: 304 BLKS,
VS 111: 632 BLKS,
VS 112: 1085 BLKS,
END OF AMAIDX FILE
4. Data center does a DEMAND POLL on the unpolled data in the corrupt
version. The data center should now be able to retrieve the previously
unpolled data from version 108 by executing a DEMAND POLL, start-
ing at sequence number 608699, for 49 blocks.
This starting sequence number for the demand polling is calculated by
using the original sequence number of version 108 (607413) and adding
the blocks in version 108 (1335) to arrive at the correct next sequence
number, 608748. From this sequence number, the 49 blocks of unpolled
data in version 108 are subtracted (608748 minus 49) to arrive at the
actual starting sequence number, 608699. This is where the data center
should start the demand poll.
5. Delete the temporary AMA index file. After the data center confirms
that they have successfully retrieved the previously unpolled 49 blocks
from the BMC, remove the temporary AMA index file. This doesn't
remove the AMA data (the AMACRD files), but it does remove the
AMAIDX file. The following command removes the AMAIDX file,
but a new one is built in a subsequent step (new AMAIDX file that is
built contains the correct version numbers). Enter the command (at the
terminal)>
>DELFILE AMAIDX 1 255 (cr)
System response:
VERSION 02 DELETED
6. Create a new AMAIDX file starting with the first good sequence num-
ber containing PRIMARY AMA. The following command creates a
new AMA index, starting with version 109 as the first version having
PRIMARY AMA data. All subsequent versions numbers in the index
(110, 111 and 112 in the example above) will be PRIMARY AMA, and
will be included in the new AMA index. The system should report,
GOOD AMAIDX FILE, indicating that the new index was properly cre-
ated. Create a new AMAIDX file starting with version 109 containing
all PRIMARY data. Enter the command (at the terminal):
>IDXMAINT CREATE DIR AMA 109 (cr)
System response:
AMA FILE ESTABLISHED
GOOD AMAIDX FILE
7. Confirm that there is only one AMAIDX file on the disk. Enter the fol-
lowing command to check the disk to confirm that only one AMAIDX
file exists.
1389 PRIMARY, AMA SEQ #608740
304 PRIMARY, AMA SEQ #610129
632 PRIMARY, AMA SEQ #610433
1085 PRIMARY, AMA SEQ #611065
BMC II AMAT Quick Reference Guide