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Type of feature
Disk mirroring is a base feature. Because this feature requires two hard disk drives, it is only available on Avaya IR systems running on the Sun Fire 280R hardware platform.
About the disk mirroring feature
Disk mirroring helps to ensure data security and availability by providing a completely redundant set of data. A redundant set of data greatly reduces the risk of data loss due to a hard disk drive or system failure. If one hard disk drive is disabled or removed, the Avaya IR system can boot automatically from the other hard disk.
Note:
If the system reboots after a hard disk drive has failed or has been removed and the drive has not be properly detached (using the mirror_admin command), it will come up in single user mode. In single user mode, the system will only allow a single login from the console. To restore the system to multi-user mode, log in as root, enter mirror_admin detach at the command prompt, and reboot the system.
The disk mirroring feature is provided by the Solstice DiskSuite 4.2.1 functionality of the Solaris operating system. Only full disk mirroring is supported; partial mirroring of a hard disk drive is not supported.
The following table shows the mirrors, submirrors, directories, and partition sizes that are set up when the system base software is installed:
Mirror |
Primary submirror |
Secondary submirror |
Directory |
Partition size in GB |
d1 |
d11 (c1t0ds1) |
d12 (c1t1ds1) |
swap |
2 |
d3 |
d31 (c1t0ds3) |
d32 (c1t1ds3) |
/voice1 |
10 |
d5 |
d51 (c1t0ds5) |
d52 (c1t1ds5) |
/unused1 |
10 |
d6 |
d61 (c1t0ds6) |
d62 (c1t1ds6) |
/unused2 |
10 |
d7 |
d71 (c1t0ds7) |
d72 (c1t1ds7) |
/export |
approximately 16 |
d9 |
d91 (c1t0ds0) |
d92 (c1t1ds0) |
/ |
20 |
After disk mirroring is set up, the partitioning of the UNIX file system should not be changed.
The status of the disk mirroring configuration is checked daily. The system attempts to fix any problems that are found. If a problem cannot be fixed, the system raises a CGEN043 alarm and sends a message to the following log file: /vs/mirror/elog.
Hardware requirements
Two hard disk drives that have the same size and geography are required for disk mirroring.
Software requirements
The disk mirroring feature is installed as part of the base system software.
Setup considerations
Disk Mirroring is installed and configured automatically when the base system software is installed.
