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En eindelijk heb ik van seagate een echt antwoord op al mijn vragen (de opmaak van de mail was wat raar, dus die heb ik even herzien):
========================================================
Hello <Halfgaar>,
The noise you are referring to is what we call off-line seek.
Here are the answers to your questions and a explanation of what the
off-line seek feature does.
Q: Is this feature supposed to be present on all Alpine drives (I
mean, of the same type, for example ST3120026A)?
A: It is present on all Alpine drives.
Q: Do we have a list of the model numbers that have this feature?
A: It is present on all Alpine models.
Q: Is this feature permanent? I have heard that the feature performs
Off-line the first 6-8 hours of it's life, but customers are complaining
that there hard drives have been running in excess of 175 running hours
and yet the seeks are still happening.
A: The feature will run non stop as long as you are in idle and do not recieve ATA commands.
Q: Can this feature be turned off?
A: No. Only by factory congen. Meaning certain hard drives may have this feature disabled due to factory code written to the firmware, which may have been requested by a Seagate proprietary OEM.
Q: Does this problem justify a warranty-claim?
A: I really do not believe so. The off-line scan feature is not a flaw, it is a useful tool.
Here's the algorithm:
The following algorithm never stops while we are in idle.
T=idle detected
T+ 40 seconds:
READ Activity Follows (~1 minute 10 seconds)
Read 1st 438MB at OD (This special area always gets read repeatedly
each
loop pass. OS and other important information here)
Update System sectors (read Reserve Track, Read Temp, Update Health
Log,
Update SMART Attributes)
Read 2.3GB starting at last read location (This read picks up where the
last loop pass left off, we keep incrementing by 2.3 GB)
Benefits that we could feature from read activity:
Checking for grown defects. Reallocating defective sectors.
(Performance and reliability benefits)
Monitoring temperature of drive (Reliability benefit)
Update health log and SMART attributes (Reliability benefit)
SEEK Activity Follows- This activity is to randomly reposition the head
over different parts of the media to limit wear issues. (~6 minutes)
Benefits that we could feature from seek activity:
Reliability benefit
Continually loop above activity as long as we are in idle
So as you can see, the off-line scan is a newly implemented feature
that will provide performance and reliability benefits.
========================================================
What Alpine is, weet ik niet. Misschien een moederbedrijf ofzo. Weet iemand dat?
Maar goed, de schijf houden dan maar. Elke fabrikant schijnt het ook nog te implementeren ook, dus ik schiet er niets mee op, met omruilen.
========================================================
Hello <Halfgaar>,
The noise you are referring to is what we call off-line seek.
Here are the answers to your questions and a explanation of what the
off-line seek feature does.
Q: Is this feature supposed to be present on all Alpine drives (I
mean, of the same type, for example ST3120026A)?
A: It is present on all Alpine drives.
Q: Do we have a list of the model numbers that have this feature?
A: It is present on all Alpine models.
Q: Is this feature permanent? I have heard that the feature performs
Off-line the first 6-8 hours of it's life, but customers are complaining
that there hard drives have been running in excess of 175 running hours
and yet the seeks are still happening.
A: The feature will run non stop as long as you are in idle and do not recieve ATA commands.
Q: Can this feature be turned off?
A: No. Only by factory congen. Meaning certain hard drives may have this feature disabled due to factory code written to the firmware, which may have been requested by a Seagate proprietary OEM.
Q: Does this problem justify a warranty-claim?
A: I really do not believe so. The off-line scan feature is not a flaw, it is a useful tool.
Here's the algorithm:
The following algorithm never stops while we are in idle.
T=idle detected
T+ 40 seconds:
READ Activity Follows (~1 minute 10 seconds)
Read 1st 438MB at OD (This special area always gets read repeatedly
each
loop pass. OS and other important information here)
Update System sectors (read Reserve Track, Read Temp, Update Health
Log,
Update SMART Attributes)
Read 2.3GB starting at last read location (This read picks up where the
last loop pass left off, we keep incrementing by 2.3 GB)
Benefits that we could feature from read activity:
Checking for grown defects. Reallocating defective sectors.
(Performance and reliability benefits)
Monitoring temperature of drive (Reliability benefit)
Update health log and SMART attributes (Reliability benefit)
SEEK Activity Follows- This activity is to randomly reposition the head
over different parts of the media to limit wear issues. (~6 minutes)
Benefits that we could feature from seek activity:
Reliability benefit
Continually loop above activity as long as we are in idle
So as you can see, the off-line scan is a newly implemented feature
that will provide performance and reliability benefits.
========================================================
What Alpine is, weet ik niet. Misschien een moederbedrijf ofzo. Weet iemand dat?
Maar goed, de schijf houden dan maar. Elke fabrikant schijnt het ook nog te implementeren ook, dus ik schiet er niets mee op, met omruilen.