Data Protection (Disk Availability)
Protecting the disks with redundancy is the minimum level of protection required by SAP. Disk array controllers (DACs), as well as volume managers, have features that help protect access to the data. RAID levels, disk array controllers, and file systems are discussed in this section, as well as their potential performance impact.
Basic Principles
Protecting the data on the storage system of the SAP database server is a matter of doing a few simple things.
Choose a RAID configuration that satisfies both data protection and the performance requirements of the SAP system.
Protect access to the disks by making the I/O channels redundant.
Protect the integrity of the database by separating the logs from the data ...
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