B.2.5.4 Configuring Disk Order Scan to Exclude Single Path Disks

To configure ASMLIB to exclude particular single path disks, complete the following procedure.

  1. Using a text editor, open the ASMLIB configuration file /etc/sysconfig/oracleasm.
  2. Edit the ORACLEASM_SCANEXCLUDE variable to provide the prefix path of the single path disks.

    For example, if you want to exclude the single path disks /dev sdb and /dev/sdc, then provide a prefix path similar to the following:

    ORACLEASM_SCANEXCLUDE="sdb sdc"
  3. Save the file.
When you have completed this procedure, then when ASMLIB scans disks, it scans all disks except for the disks with the sdb and sdc prefixes, so that it ignores /dev/sdb and /dev/sdc. It does not ignore other SCSI disks, nor multipath disks. If you have a multipath disk (for example, /dev/multipatha), which accesses both /dev/sdb and /dev/sdc, but you have configured ASMLIB to ignore sdb and sdc, then ASMLIB ignores these disks and instead marks only the multipath disk as an Oracle ASM disk.