22.2. Enabling/Disabling Write Barriers
-o nobarrieroption for
mount. However, some devices do not support write barriers; such devices will log an error message to
/var/log/messages(refer to Table 22.1, “Write barrier error messages per file system”).
Table 22.1. Write barrier error messages per file system
|File System||Error Message|
nobarrieris no longer recommended in Red Hat Enterprise Linux 6 as the negative performance impact of write barriers is negligible (approximately 3%). The benefits of write barriers typically outweigh the performance benefits of disabling them. Additionally, the
nobarrieroption should never be used on storage configured on virtual machines.