If a hard drive has a smart status warning or the drive is questionable this test may be of use NOTE this test does not work with AHCI or Raid sata operation. It must be done with IDE, ATA, or compatibility mode:
Before running this test it would be a good idea to backup any data that you cannot afford to lose. This test uses the hard drive at 100%. If the drive is failing or has problems it is possible for the drive to fail suddenly especially during heavy use as this test will do. It is unlikely but still I recommend backing files up to be safe. Here are the instructions to run the test:
The first step will be to burn MHDD to a disc as an image (cd preferably). MHDD Can be found here: http://hddguru.com/software/2005.10.02-MHDD/ Click the Last version of MHDD, CDROM iso-image download and burn this file directly to a disc.
TO CHANGE SATA OPERATION: (You may need to use your keyboard arrow keys and enter key if you can not click to change settings).
After burning the disc, restart the laptop and start tapping f2 or f1 or delete right away to get into the bios. There you should see System Configuration, expand that by clicking the + button (or using your arrow keys and enter key). In that list there should be something called Sata operation. (Sata Operation may also be by itself in that first screen list)
Click on sata operation and take note of the current setting to the right it will probably be set to AHCI it will need to be switched back to this after MHDD is done running. Select ATA, compatibility or ide mode and then click apply. Save and exit the bios, or if apply was the only option you can use Ctrl+Alt+Delete to restart.
COMMON BOOT MENU/BIOS keys: https://support.fixmestick.com/hc/en-us/articles/201577043-How-to-get-to-your-Boot-Menu-or-your-BIOS-settings
Now with the burned disc in the drive after a restart, start tapping (F12 Dell, Toshiba, Lenovo), (F9 HP), or (Esc HP, Samsung, Sony) on the keyboard (or change your boot options to boot to cd/dvd first). This will bring up the boot options menu. Select cd/dvd/cd-rw drive and hit enter.
If this worked correctly and booted to mhdd you should see a screen that says Microsoft windows 98 startup menu. You can let the timer run out or just hit enter on option (2 . Start computer without SCSI support).
Now you should see a screen with numbers, most of these will not have any device listed behind them but one number should for example on my dell computer number 6 has WDC WD1600BEVT-75A23T0… and at the end a number in white which is the size of the drive.
Example: If your drive is a 500gb I would expect that number in white to be somewhere around 500,107,862,016 or close to. Find the correct drive to test then on the keyboard type the number in front of the drive (in my case it was 6) and then hit enter.
Now you should have a screen with MHDD> and a blinking cursor.
Hit F4 on the keyboard 1 time and this will open a mini menu, use your arrow keys to highlight the remap option, hit enter to select it and then use your arrow keys again to change it to "enabled" After enabling re-map hit enter to go back to the menu, now use your arrow keys to highlight the "time out" option, hit enter on this and change the time out to 2 seconds by using backspace and then typing in 2, then hit enter to go back to the menu, now hit F4 again to start the re-map test.
You should be able to see the computer start scanning, each block represents 255 sectors (130560 bytes) on the hard drive. What we are looking for will show up on the right side of the screen.
There is a list on the right which shows numbers:
Anything below the <150ms is a slow sector or a problem sector. Slow sectors <500 or >500 will slow down the computer. If there are a lot of these one after another (several 1000 or more) the drive should probably be replaced. Also if you have any at the end that were marked as UNC this means the drive has uncorrectable errors and the hard drive should probably be replaced.
Basically if you have any sectors that are below <150 (green) let me know and if possible the total number of them. If you can take a picture and post it here even better
If all of the sectors were ok and fell within the range of:
Then the hard drive is ok, if there are only a few that are slow <500 or >500 the hard drive should be ok to use.
After you are done testing you will need to go back into the bios by restarting the computer and tapping F2, F1, Delete (or whatever key gets you into bios). Go back to Sata Operation and change it back to the default which probably was AHCI.
Then restart and the computer should boot again.
(If you are getting a blue screen and the computer restarts go back into the bios and confirm that Sata Operation is set to what it was before changing it to IDE, ATA, or compatibility).
What re-map does: This option if enabled attempts to move available data from a bad block to a good block and tells the hard drive to disable the bad block (or replace it from the reserve list), the hard drive controller should then add the bad block to a black list (list of blocks that the drive will not write to). This is a good option for drives that have available free space that have many bad blocks that can cause many problems including: BSOD bug check 0X7A etc. During a scan with re-map enabled a BLUE block after a bad block indicates re-map was attempted.
Frequently asked questions MHDD> http://forum.hddguru.com/viewtopic.php?t=5