Cisco Cisco 7815I Media Convergence Server Guía Para Resolver Problemas
The information in this document was created from the devices in a specific lab environment. All of the
devices used in this document started with a cleared (default) configuration. If your network is live, make sure
that you understand the potential impact of any command.
devices used in this document started with a cleared (default) configuration. If your network is live, make sure
that you understand the potential impact of any command.
Conventions
Refer to Cisco Technical Tips Conventions for more information on document conventions.
Drive Mirroring (RAID 1)
The default Cisco CallManager OS image install installs the MCS with a RAID 1 configuration. Drive
mirroring, which is also called RAID 1, is the highest performance and highest fault tolerance RAID method.
RAID 1 is the only option that offers fault tolerance protection if only two drives are installed or selected for
an array. In order to create fault tolerance, drive mirroring stores two sets of duplicate data on a pair of disk
drives. RAID 1 is the most expensive fault tolerance method because 50 percent of the drive capacity is used
to store the redundant data. RAID 1 always requires an even number of disks. The data is striped across the
drives, and then mirrored.
mirroring, which is also called RAID 1, is the highest performance and highest fault tolerance RAID method.
RAID 1 is the only option that offers fault tolerance protection if only two drives are installed or selected for
an array. In order to create fault tolerance, drive mirroring stores two sets of duplicate data on a pair of disk
drives. RAID 1 is the most expensive fault tolerance method because 50 percent of the drive capacity is used
to store the redundant data. RAID 1 always requires an even number of disks. The data is striped across the
drives, and then mirrored.
If a drive fails, the mirror drive provides a backup copy of the files, and there is no interruption of normal
system operations. The mirroring feature requires a minimum of two drives. By default, the MCS 7830 and
MCS 7835 are delivered with two disks that are configured with RAID 1. Therefore, recovery from a single
drive failure is possible.
system operations. The mirroring feature requires a minimum of two drives. By default, the MCS 7830 and
MCS 7835 are delivered with two disks that are configured with RAID 1. Therefore, recovery from a single
drive failure is possible.
This diagram shows the stripe of the data in chunks in order to provide a mirror. Data chunk A on one disk is
mirrored to A on another disk, data chunk B is mirrored to B on another disk, and so on. In other words, the
data is striped in chunks and then copied (mirrored) to the second disk. If the first disk that holds data A fails,
you can still read/write from the other disk that contains data A:
mirrored to A on another disk, data chunk B is mirrored to B on another disk, and so on. In other words, the
data is striped in chunks and then copied (mirrored) to the second disk. If the first disk that holds data A fails,
you can still read/write from the other disk that contains data A:
In order to find out how your disks have been configured, perform one of these two procedures:
Use the Array Configuration Utility from the SmartStart and Support Software CD.
Insert the SmartStart and Support Software CD in the CD drive and power up the server.
A menu displays.
a.
Choose Array Configuration Utility.
b.
After completion, remove the CD and restart the server.
c.
1.
Use the Compaq Array Configuration Tool.
Choose Start > Programs > Compaq System Tools > Compaq Array Configuration Tool.
This window pops up:
a.
2.