What is disk mirroring in SAP BC-DB - Database Interface, Database Platforms?

SAP Term: disk mirroring

• Component: BC-DB

• Component Name: Database Interface, Database Platforms

• Description: A means of protection against disk failures by using redundant disks. Disk mirroring means writing or mirroring identical data to physically different disk locations to guard against disk failures. Mirroring can be driven by hardware disk controller, RAID disks using RAID 1 or software CPU code to emulate mirroring, known as LVM. The mirrored data can reside on either another disk spindle within the same disk array RAID 1 or a standalone disk LVM.

Smart SAP Assistant

• Key Concepts: 
  Disk mirroring is a process of creating an exact copy of a hard disk drive (HDD) or solid-state drive (SSD) on another HDD or SSD. This process is also known as RAID 1, which stands for Redundant Array of Independent Disks. The purpose of disk mirroring is to provide redundancy and fault tolerance in case of a disk failure. 
  
  How to use it: 
  Disk mirroring can be used in SAP systems to ensure that data is not lost in the event of a disk failure. To set up disk mirroring, two identical disks must be connected to the same system. The data from one disk is then copied to the other disk, creating an exact copy. This process can be done manually or with the help of software. 
  
  Tips & Tricks: 
  When setting up disk mirroring, it is important to ensure that both disks are identical in terms of size and type. Additionally, it is important to regularly check the status of the mirrored disks to ensure that they are still in sync. 
  
  Related Information: 
  Disk mirroring is part of the BC-DB Database Interface component and is supported on most major database platforms, including Oracle, Microsoft SQL Server, IBM DB2, and SAP HANA. It is also supported on some cloud platforms such as Amazon Web Services and Microsoft Azure.