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Amilo L 1300 External HDD faster than identical Internal

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Amilo L 1300 External HDD faster than identical Internal

Postby Erikensio » Sat Oct 07, 2006 7:09 pm

Recenly acquired an external HDD drive in a USB casing speed writing and reading nearly 5 times that of the internal identical 40Gbyte internal drive. How Come? :roll:
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Postby aspettl » Sat Oct 07, 2006 8:41 pm

Can you benchmark your drives?
http://www.simplisoftware.com/Public/in ... est=HdTach

Maybe DMS is inactive for your internal disk?

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Aaron
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Amilo L 1300 External HDD faster than identical internal

Postby Erikensio » Sun Oct 08, 2006 6:29 am

Bench marks for internal drive:
write 5.57 Mb/s
read 1.85 Mb/s
and for External
20.57 and 13.83 respectively.
DMS (Disk Management System?) may well not be activated - where can I check? - nothing untoward in Device Management as far as I can see.
Removed DMA from primary IDE using PIO resultant bench mark
write = 6.25
read = 1.29
Looks as if DMA not working
UltraDMA mode 5 is stated as normal transfer mode.
( I always return to original settings after testing)
Also tested with no startup programs and no broadband wireless - No Change.
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Re: Amilo L 1300 External HDD faster than identical internal

Postby aspettl » Sun Oct 08, 2006 12:13 pm

Sorry, I wanted to write DMA, not DMS :oops:

Erikensio wrote:Looks as if DMA not working

I think so, too.
You could try this: http://winhlp.com/WxDMA.htm

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Aaron
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Amilo L 1300 External HDD faster than identical Internal

Postby Erikensio » Sun Oct 08, 2006 5:36 pm

Yes - the quick solution appears to give good results - but the benchmark test returns to PIO mode as does writing a large file/folder to the drive.
It looks as if some interference is occuring in the process of writing to the drive causing the reversion. Shall investigate the more detailed information on http://winhlp.com/WxDMA.htm
Thanks
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Postby aspettl » Wed Oct 11, 2006 11:21 am

You could try "Desensitize Your Computer's IDE Channels", but I wonder why the timeouts or crc errors occur...

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Aaron
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Amilo L 1300 External HDD faster than identical Internal

Postby Erikensio » Sat Oct 14, 2006 8:55 am

Have exhaustively tried all combinations and suggestions.
The Device manager information reports the current transfer mode as Ultra DMA 5 the memory register is set up correctly.
I am beginning to wonder whether this drive has ever worked in DMA mode or has it always been a dud.?
Thanks anyway for the suggestions - been very interesting.
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