Data Recovery Software tools may be applied only to fully functional hard drive.
Even when the hard drive is correctly detected by computer BIOS/CMOS, it is not enough to come to a conclusion that your drive is 100% functional. The drive is fully functional only if all sectors on disks are readable.
When the drive has problem with accessing the sectors (e.g. one of the heads is damaged, or drive has a damaged surface, i.e. micro scratches), any attempts to use software data recovery tools lead to further damage of data on it, causing the data recovery totally unlikely.
Before start using any data recovery utilities, make sure your hard drive is fully (mechanically and electrically) functional.
If you suspect any hardware problems:
- Do not try or use any data recovery software
- Do not run any repair utilities, as those kind of utilities may further aggravate the problem, plus they are made to rectify the anomalies in the file system, but useless against any other issues
If you hear any unusual noises (clicking/ticking/grinding etc.) coming from your hard drive this might be an indication of a serious physical damage to the media. Stop at once and shut down the machine, persisting to revive the hard disk may cause a serious damage the internal disk platters and lead to permanent data loss.
Few Successful Recoveries
Here, you can read some of the comments from Data-R-US customers: small, large business companies or people living near your home.
The Ohio State University, Columbus: MAC G-RAID External Hard Drive Array
Electrician came into the office to activate new electrical outlets and turned off the power to the office. This caused a premature shutdown of the Mac RAID station. In the few days after this event occurred, the drive would not show up on the desktop immediately upon system power-up, taking a long time to mount and appear. I ran DD rescue on it and it got to a few recovered files before RAID stopping completely. Volume will no longer mount at all and makes two repetitive noises on power-up until it stops making noises completely. Drives in the RAID have not been physically altered, modified, all original parts, enclosure, has not been opened, etc.
Thanks for your help.
Dane R. Corvallis, OR USA: Hitachi HGST Travelstar
Failed in BIOS or CMOS. Drive spins up on power on but fails to be recognized by bios. No head slamming noises. Failed one morning when house was cool. That afternoon, tried again and booted fine. Wrote off some data to CD but had a system hang when connecting to a large backup drive. Had to power down and it has never booted since. I was mfg engineer for HP laptops and have recovered many drives myself. Even opening them sometimes. I uncovered the hidden screw, thinking I might open this one, but decided against it - It has NOT been opened. I suspect a firmware chip on the board has failed.
Thank You very much for what appears to be a near perfect recovery.