Cisco Headend System Release 2.5
Detach Disk Mirroring on the DNCS
4000916 Rev C
35
Detach Disk Mirroring on the DNCS
Introduction
In Examine Mirrored Devices (on page 18), sites confirm the disk mirroring function
is working correctly before beginning the upgrade process. In this procedure you
now disable the mirroring functions on the DNCS to ensure that the contents of the
mirrored disk reflects the data and configuration of the DNCS prior to an upgrade. If
the upgrade fails for any reason, you can then swap the positions of the mirrored
disks to restore your system to its condition prior to the upgrade attempt.
is working correctly before beginning the upgrade process. In this procedure you
now disable the mirroring functions on the DNCS to ensure that the contents of the
mirrored disk reflects the data and configuration of the DNCS prior to an upgrade. If
the upgrade fails for any reason, you can then swap the positions of the mirrored
disks to restore your system to its condition prior to the upgrade attempt.
Note: Disabling disk mirroring is usually referred to as detaching disk mirroring.
Detaching Disk Mirroring on the DNCS
Follow these instructions to detach the disk mirroring function of the Enterprise 450
or Sun Fire V880 DNCS. Sites with an Enterprise 250 DNCS should proceed instead
to Ensure No Active Database Sessions on the DNCS (on page 36).
or Sun Fire V880 DNCS. Sites with an Enterprise 250 DNCS should proceed instead
to Ensure No Active Database Sessions on the DNCS (on page 36).
Note: You should still be logged in as root user to an xterm window on the DNCS.
1 Insert the CD labeled DBDS Maintenance CD 2.1.x into the CD-ROM drive of
1 Insert the CD labeled DBDS Maintenance CD 2.1.x into the CD-ROM drive of
the DNCS.
2 Type df -n and then press Enter. A list of the mounted filesystems appears.
Note: The presence of /cdrom in the output confirms that the system correctly
mounted the CD.
mounted the CD.
3 Type /cdrom/cdrom0/s3/backup_restore/mirrState -d and then press Enter. The
system displays the following message:
WARNING!!
Proceeding beyond this point will DETACH all d7xx submirrors.
Are you certain you want to proceed?
WARNING!!
Proceeding beyond this point will DETACH all d7xx submirrors.
Are you certain you want to proceed?
4 Type y and then press Enter. The system disables the disk mirroring functions on
the DNCS.
5 Type eject cdrom and then press Enter. The system ejects the CD.
6 Go to Ensure No Active Database Sessions on the DNCS (on page 36).
6 Go to Ensure No Active Database Sessions on the DNCS (on page 36).