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 Post subject: My Seagate HDD Running Slow
PostPosted: October 16th, 2011, 8:46 
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Joined: October 16th, 2011, 8:20
Posts: 1
Location: Solapur
Hi All,

My Seagate 500GB ST3500410AS is running extremely slow.
I sent my HDD to seagate company for replacement, My hard drive was rejected for replacement, i do not know exact reason,

So , I did formatted and partitioned my drive and installed windows xp sp3.
Nothing changed, my drive become slower than before after formatting .

I have installed HD Tune Pro. I have attached some screenshot.

Can anyone tell me what these benchmarks tell?


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 Post subject: Re: My Seagate HDD Running Slow
PostPosted: October 16th, 2011, 9:24 
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Joined: May 6th, 2008, 22:53
Posts: 2138
Location: England
jugalk1111 wrote:
My Seagate 500GB ST3500410AS is running extremely slow.

From the SMART data, it is clear that the drive is faulty, and the slow I/O is a typical result of this type of problem.

jugalk1111 wrote:
I sent my HDD to seagate company for replacement, My hard drive was rejected for replacement, i do not know exact reason,

I don't understand how you do not have a reason for them rejecting that - but anyway...

The drive is faulty. Since it seems that you do not need the data (based on your previous post), then just replace it - that will be cheaper, easier, and quicker than other options IMHO.


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 Post subject: Re: My Seagate HDD Running Slow
PostPosted: October 16th, 2011, 9:33 
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Joined: May 13th, 2010, 11:17
Posts: 2176
Location: Kuwait
if am not mistaking here most probably bad sectors on the beginning of your drive

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 Post subject: Re: My Seagate HDD Running Slow
PostPosted: October 16th, 2011, 11:06 
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Joined: May 6th, 2008, 22:53
Posts: 2138
Location: England
@nhchmg:
nhchmg wrote:
DMA is off?

Not relevant here - that setting could not cause this specific data (shape of benchmark graph and SMART data) given by the OP.


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 Post subject: Re: My Seagate HDD Running Slow
PostPosted: October 19th, 2011, 4:16 
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Joined: September 8th, 2009, 18:21
Posts: 9685
Location: Australia
I agree that the root cause of the slow performance is bad sectors, but the reason that the benchmark graph is a flat line is that Windows has downgraded the drive's performance from DMA mode to PIO because it has detected an excessive number of CRC errors.

DMA Mode for ATA/ATAPI Devices in Windows XP:
http://www.microsoft.com/whdc/device/st ... E-DMA.mspx

DMA reverts to PIO:
http://winhlp.com/node/10

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 Post subject: Re: My Seagate HDD Running Slow
PostPosted: October 19th, 2011, 4:37 
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Joined: May 6th, 2008, 22:53
Posts: 2138
Location: England
fzabkar wrote:
[...] the reason that the benchmark graph is a flat line [...]

The reason for my earlier comment was that the benchmark graph is not a flat line! :) The maximum speed seen is a flat line, yes, but not the actual shape of the data points.

Indeed the max speed has downgraded as you explain (again :) ), but that's a consequence, and not a cause, hence IMHO not useful to consider here, as "fixing" the DMA-related effect will be purely temporary in the OP's case.

I suspect we're in agreement, just looking at this from different starting points, but I couldn't let the comment about the benchmark graph being "flat" pass without a reply. :)


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