Updated device-mapper-multipath packages that fix a bug are now available for Red Hat Enterprise Linux 5 Extended Update Support.
The device-mapper-multipath packages provide tools to manage multipath devices by giving the dm-multipath kernel module instructions on what to do, as well as by managing the creation and removal of partitions for Device-Mapper devices.
This update fixes the following bug:
* The "dev_loss_tmo" and "fast_io_fail_tmo" sysfs parameters provide a way to customize timeout values in case of a multipath device failure. Prior to this update, the multipathd daemon was unable to set these values, which may have led to performance issues. To prevent this, this update adds support for the "dev_loss_tmo" and "fast_io_fail_tmo" configuration options, which allow users to override default values for the corresponding sysfs parameters. (BZ#678991
All users of device-mapper-multipath are advised to upgrade to these updated packages, which resolve this issue.