Cfrgtkky

How can I reset the SMART results so it does not register previous results. My reason is that I was testing the hard drives closed together on a closed case. This made one of the HDD fail the Airflow Temperature reading.

After opening the case up (Which lowered the Temp of all drives 10 degrees Celsius in 5 minutes) and then separating the drives a bit more (3 less degrees) All results were good but since the Airflow reading failed in a previous reading, it always shows as failing.

So how can I reset the readings for SMART?

Hard drives have spare space for recovery reasons. The recovery happens automatically. Recovery tools only remap physically bad sectors to this spare space. Once remapped, when a read or write occur to a bad sector, the drive turns the access to the spare space, and hides the error.

To be honest I don't know of a way to reset SMART data. It's something that the hard drive maintains internally, and in any event it would be a bad thing to do.

SMART reports that your hard drive is failing! Resetting the counters will not change the fact that an error threshold for the drive has been exceeded.

So NO, you can't Reset S.M.A.R.T. history. It's installed at the factory for drive evaluation upon failure. SMART can only be disabled or enabled.

I hope this answers your question.

Actually there is a way to reset S.M.A.R.T. data. You only need simple rs232 to usb converter (uart to ttl) and a few cables attached to hdds diagnostic interfaces. (it's on the right side of sata port, 5 or 4 pins) You must conect RX TX and GND cables (and power cable of course :D) then power on HDD and connect to it with putty or hyperterminal (linux can connect with it's own terminal i guess)
for example for seagate drives:
for 7200.10 and older baud rate is 9600
for 7200.11 and newer is 38400

commands
after connection hit CTRL + Z
then type "/1" hit enter
type "N1" hit enter
when it finishes remove all cables and turn on HDD like normal to see changes :)

for other hdd info use google :)

SMART data is not very standard between manufacturers, but the Hard Drive Temperature test should indicate if the drive's temperature has gone over a threshold in the past: http://en.wikipedia.org/wiki/S.M.A.R.T.#Known_ATA_S.M.A.R.T._attributes

The thinking is that an overheat increases your chances for failure. SMART isn't saying your drive is bad, but has an increased chance for failure in the future.

SMART is meant to be an audit of the drives history and is maintained by the drive itself, so you cannot "reset" or "clear" SMART values.

The point of current / worst attributes like temperature is exactly this: to tell you if the drive has ever been outside its max operating temperature, and thus might have suffered permanent damage.

That's why it says "failed in the past", not "failing now": you did just barely touch the max-temp threshold. Note the attribute display shows "normalized: 50, threshold: 45, worst: 45". (These are 0..200 normalized values like for any other attribute, not raw Celsius temps.)

You also have some bad sectors (uncorrectable sector errors), so whether the brief high temperature caused that or that was separate, it's probably time to ditch that drive.

A better SMART software UI would show you the current and max-ever temp. e.g.
smartctl -a /dev/sda or smartctl -x /dev/sda (-x prints all available SMART and non-SMART data it can get from the drive, including a temperature history log if the drive has one, with an ASCII bar graph.)

smartctl -x includes this for an old WD Green 1TB (WD10EADS) hard drive:

Current Temperature:                    36 Celsius

Power Cycle Min/Max Temperature:     25/42 Celsius

Lifetime    Min/Max Temperature:     35/46 Celsius

The software you're using looks like it's only showing the current temp, which is slightly below the threshold, but it's not going to hide the fact that the drive was out-of-spec at some point in the past.

You could certainly justify ignoring that momentary high-temperature, if you really did correct it in minutes. But you won't (or shouldn't) ever be able to make the drive itself lie about the fact that it was over its rated max temp for some time, and thus the attribute did fail in the past.

You can configure smartd to ignore any given attribute so you can still get a useful notification if anything else crosses a threshold into officially-failing territory.: smartd.conf(5) says:

-i ID [ATA only] Ignore device Attribute number ID when checking for failure of Usage Attributes. ID must be a decimal
integer in the range
from 1 to 255. This Directive modifies the behavior of the '-f' Directive and has no effect without it.

This is useful, for example, if you have a very old disk and don't want to keep getting messages about the
hours-on-lifetime Attribute
(usually Attribute 9) failing. This Directive may appear multiple times for a single device, if you want to ignore
multiple Attributes.

To my knowledge, the only way to stop it is to turn off SMART in the BIOS. This will only stop the HARDWARE, though.

Your OS will still query the drive for its SMART info and tell you it's failing.