Disk no.:	Directory	Contents of directory
Disk 1:	origlogA	Online redo log files from the first and third group (Set A)
Disk 2:	origlogB	Online redo log files from the second and fourth group (Set B)
Disk 3:	mirrorlogA	Mirrored online redo log files from the first and third group (Set A)
Disk 4:	mirrorlogB	Mirrored online redo log files from the second and fourth group (Set B)
Disk 5:	sapdata1	Database files, mirror of the control file
Disk 6:	sapdata2	Database files, mirror of the control file
Disk 7:	sapdata<n>	Other database files in sapdata3 up to sapdata<n> , each on separate disks when possible

• Make sure that the number and descriptions of the control file and its mirrors agree with the entry in the init.ora profile. The database files can be distributed among any number of disks.
• Make sure that the offline redo log files (online redo log files saved to the archive directory) are not kept on the same disk as the online redo log files. (The offline redo log files have not been taken into account in the above example.)