Planning for mirrored protection

Successfully plan for protecting your disks with mirrored protection.

Planning for mirrored protection
If you have a multibus system or a large single-bus system, you should consider using mirrored protection.
Deciding which disk pools to protect
Mirrored protection can be used to protect one, some, or all disk pools on a system.
Determining the disk units that are needed for mirrored protection
There are considerations that you must take into account when determining the disk units that are needed for protection.
Planning for storage capacity
For a new system, your IBM® marketing representative can help you analyze your system storage requirements. For an existing system, the planned amount of data in the disk pool is a useful starting point.
Planning for spare disk units
Spare disk units can reduce the time the system runs without mirrored protection for a mirrored pair after a disk unit failure.
Planning for total storage capacity
This information helps you plan the total number of disk units needed for your system.
Determining the level of mirrored protection that you want
Determine the level of mirrored protection that you want with the information provided.
Comparing standard mirroring and remote mirroring
Compare remote mirroring to disk unit standard mirroring.
Determining the hardware that is needed for mirroring
In order to communicate with the rest of the system, disk units are attached to IOAs, which are attached to IOPs, which are attached to buses. The number of each of these types of disk-related hardware that are available on the system directly affects the level of protection that is possible.
Determining the extra hardware needed for performance
Use this information to decide how much extra hardware you might need.
Ordering and installing the new hardware
Your IBM marketing representative will assist you in ordering your new hardware by using the typical order process. That ordering process allows for any other hardware that might be needed as part of your upgrade, such as additional racks and cables.

Parent topic: Mirrored protection