Only featured in certain Western Digital hard drives. TLER reduces the chances of the RAID controller mislabeling drive as faulty by limiting the device response time in case of the error. Under typical conditions, hard drive built-in error recovery process may take up to a minute, which is unacceptable in the RAID environment. TLER-enabeld drives will make less retries, thus limiting the recovery time. This way, the drive will remain on-line as far as RAID is concerned.