3Com NBX 100 Administrator's Manual - page 89
Disk Mirroring
89
Disk Mirroring
The V3001R and V5000 systems supports disk mirroring, using RAID1
technology, to provide data security and throughput speed. When you
fully partner the mirror disk with the master system disk, the system
writes all data to the mirror disk as well as to the master disk. If data is
read from disk, the software can read from either disk, which can
improve data access times.
If either disk fails in a fully mirrored system, the system software uses only
the remaining good disk, and system operation continues. Status
information is available on the Call Processor front panel status lights to
indicate when a disk fails and which disk to replace. After you replace a
failed disk and restart the system, the software brings the new disk up to
a fully mirrored state. The system typically takes from 30 to 90 minutes to
complete the mirroring process, depending on the amount of data on the
master disk.
Adding a Mirror Disk
If your V3001R or V5000 system uses a single disk, you can add a mirror
disk. The disk you add must have at least the same storage capacity as
the disk in the system. You must obtain a disk mirroring license to convert
a single-disk system to use disk mirroring. You also need a Phillips
screwdriver to complete this process.
CAUTION: When you add a mirror disk, you must perform a system
database backup and a system shutdown. 3Com advises that you add a
mirror disk during nonbusiness hours.
To add a mirror disk:
1 Back up the database on the system:
a Click System Maintenance > System Backup > Backup.
b Specify a location for the backup file.
2 Install the disk mirroring license:
a Obtain the license key from your dealer.
b Click Licensing and Upgrades > Licenses > Add License.
c Type the license key in the License Key field.
d Click OK.
3 Shut down the system (click System Maintenance > Reboot/Shutdown >
Shutdown).