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Installation Guide Adaptive Server Enterprise for Linux/Intel

Appendix B Creating Raw Partitions

Accessing raw devices from Adaptive Sever

Accessing raw devices from Adaptive Sever

Once the partitions are created and the devices are bound for raw disk I/O, Adaptive Server is able to use them. If Adaptive Server is running as user sybase, then apply read, write, and owner permissions to the /dev/raw/raw# device entries and the raw bound control device /dev/rawctl for user sybase.

See the chown(1), chgrp(1), and chmod(1) commands to apply correct permissions.

• To verify your settings, query the device binding using the raw command, enter:

  $ raw -qa

  The output should be:

  /dev/raw/raw1:  bound to major 3, minor 5/dev/raw/raw2:  bound to major 3, minor 6/dev/raw/raw3:  bound to major 3, minor 7/dev/raw/raw4:  bound to major 3, minor 8

• To verify your settings, query the device binding using the permissions command, enter:

  <username@servername.sybase.com:4>

  raw
  -qa

  The output should be:

  Cannot open master raw device '/dev/rawctl' (Permission denied)

Using the raw devices, Adaptive Server and the installation and configuration utility, srvbuild, detects and presents their size automatically. Just enter the absolute path to the raw device when creating the master, sybsystemprocs, sybtempdb, or any other device.