h/d S.M.A.R.T. Atributes?

[sambro]

Hi
i did a Hard disk test and found the following properties of with it.
Power Cycles = 1112
Start Stop Count = 1341
Power Off Retract Count = 1463
Power On hours(obvious) = 4525

could someone tell me what those above figures really means?

 

[Cromewell]

Hi
i did a Hard disk test and found the following properties of with it.
Power Cycles = 1112
Start Stop Count = 1341
Power Off Retract Count = 1463
Power On hours(obvious) = 4525

could someone tell me what those above figures really means?

Power Cycles:

This attribute indicates the count of full hard disk power on/off cycles.

Start/Stop Count:

This raw value of this attribute is a count of hard disk spindle start/stop cycles.

Power Off Retract Count:

This attribute shows a count of the number of times the drive was powered down.

Power On Hours:

Count of hours in power-on state. The raw value of this attribute shows total count of hours (or minutes, or seconds, depending on manufacturer) in power-on state. A decrease of this attribute value to the critical level (threshold) indicates a decrease of the MTBF (Mean Time Between Failures).
However, in reality, even if the MTBF value falls to zero, it does not mean that the MTBF resource is completely exhausted and the drive will not function normally.

 

[sambro]

i dont really understand the difference between 'Power Cycles' and 'Start Stop Count'.
And does the Power Off Retract Count includes the Power Cycles?
(coz in my case means the Disk was powered down(1463) more than the normal power on/off's(1112) ?? )

 

[Cromewell]

And does the Power Off Retract Count includes the Power Cycles?

I believe so.

Start/stop count increases when the drive is powered on from full off or from sleep mode. Power cycle count insreases when the drive is powered on from being full off.

Honesty, you can ignore most of the start attributes. The ones that are most important are the various sector counts, reallocation event count, command timeout (should always be 0), spin retry count.

 

[sambro]

it starts making sense now.
Thanks