Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am using Windows 7 and I have enabled my "S.M.A.R.T" check, too. I have bought an external 1 TB USB hard drive. When it is connected with my computer, it delays my machine initial start with about 4-5 minutes. I was very confused at the begging, then disable the "S.M.A.R.T" check and see that the computer runs normally after restart.

So, here is what I want to know:

  1. Why the check is turn for the external disk?
  2. Is there a way to use the "S.M.A.R.T" check only for my main hard drive?
  3. Why it takes 4 to 5 minutes more, as my both hard drives - internal/external are 1 TB?
share|improve this question

migrated from Sep 22 '12 at 21:41

This question came from our site for professional and enthusiast programmers.

up vote 3 down vote accepted
  1. SMART is the devices self-correction and error-detection mechanism.
  2. There is no need to disable SMART since it helps to make sure the device works correctly.
  3. Because the drive is corrupted. Try to "check the disk", especially for bad blocks. If it takes a long time to detect the disk, something is wrong with it; and it isn't SMART that is the thing that is wrong.

S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology; often written as SMART) is a monitoring system for computer hard disk drives to detect and report on various indicators of reliability, in the hope of anticipating failures.

Chances are the last time you played basketball with the disk, you ruined it. Those things are pretty sensible to external shocks. :)

Make sure you have a backup of your external drive!

share|improve this answer
Um… this did not answer the question (at all). – Synetech Sep 22 '12 at 22:17

How to stop S.M.A.R.T check running for external hard drive?

It depends on your motherboard. Its BIOS may or may not have an option that can help, but you will need to specify what board you have.

Why the check is turn for the external disk?

Again, it depends on the motherboard. Some will exclude external drives (in fact some systems cannot access SMART data on external drives even if they want to).

Is there a way to use the "S.M.A.R.T" check only for my main hard drive?


Why it takes 4 to 5 minutes more, as my both hard drives - internal/external are 1 TB?

This depends on numerous factors. I assume it is connected through USB. This means that when the BIOS POSTs, it has to first initialize the basic systems, then the USB controller, then the drive has to spin up and initialize, then it has to read the drive’s SMART data. This doesn’t usually take too long, but on my system, having any external drives (even a flash drive) adds a good 10-70 seconds to the POST time (I can’t explain the large variance).

Your BIOS may have options to limit the timeouts for the various operations. For example, my board lets me choose who long it will wait for a drive to spin up, for a USB drive to respond, etc. (I usually set it to the minimum of 10 seconds).

There should also be some options that you can set to change the mode that the drive uses which may help speed things up. Also, the drive itself (and the USB enclosure it uses) will have an effect on the initialization and response times.

Once again, it depends on your board.

BIOS external drive timeout options

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .