It means that IF and only if, your storage is dying, you might learn about it later than you wish. In cases your storage is dying you are likely also going to observe problems that are outside of an fsync() not reporting an error when you'd like it to. As long as your storage hardware isn't broken, fsync still guarantees durability. Obviously it'd be better to get the error out ASAP.
It means that IF and only if, your storage is dying, you might learn about it later than you wish. In cases your storage is dying you are likely also going to observe problems that are outside of an fsync() not reporting an error when you'd like it to. As long as your storage hardware isn't broken, fsync still guarantees durability. Obviously it'd be better to get the error out ASAP.