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#1 |
Registered User
Join Date: Jun 2012
Location: UK
Age: 44
Posts: 748
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HDD LED with a mind of its own
Does anyone know why my A1200 HDD LED flashes at random?
The best I can pin it to is CPU activity. I'm running the CF card and adapter that come from Amigakit. [ Show youtube player ] |
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#2 |
Registered User
Join Date: Sep 2009
Location: San Antonio, TX USA
Age: 50
Posts: 1,185
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Interesting
Run a Snoopdos to see if there is anything accessing the HD. |
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#3 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 44
Posts: 9,961
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Some CF adapter/card combinations make the HDD led blink erratically.
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#4 |
R.I.P Smudge 18-08-16
Join Date: Aug 2005
Location: Leicester/UK
Age: 66
Posts: 3,968
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I have the Amigakit card/adapter combo (4gb SFS) and my led flashes normally.
Does the led on the adapter blink like that as well? Have you another card to try? |
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#5 | |
Registered User
Join Date: Jun 2012
Location: UK
Age: 44
Posts: 748
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Quote:
@amiman99 Thanks, but not sure how to do that ![]() @Jope So it's just a fact of life then? Like death and taxes? Still would be interesting to understand why the phenomena occurs. |
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#6 |
Registered User
Join Date: May 2001
Location: ?
Posts: 19,665
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I never seen such a thing occur. Have you checked if the cable has shorted with any part of the computer? Since it goes under the keyboard perhaps you have pinched it and it's touching the metal part of the keyboard assembly. This is just a wild, uninformed guess, though.
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#7 |
70X7
Join Date: Apr 2008
Location: Ἑλλάς
Posts: 1,078
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Maybe ghost in your Amiga..
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#8 |
PSPUAE DEV
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Definately card used with combination of certain mobo's
Seen this a few times. Some cf cards cause light to blink erratically and randomly when hdd is not used. |
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#9 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 44
Posts: 9,961
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My guess is that some cards let the activity pin float and as a result the voltage occasionally goes above the threshold voltage required to switch the LED on. Could be perhaps fixed with a mild pullup resistor at the CF adapter?
This is not based on any measurements though. Feel free to dig out your oscilloscope and check it out. :-) |
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#10 |
Moderator
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Have you tried the Turing test to be sure if it has a mind of its own?
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#11 | ||
Registered User
Join Date: Jun 2012
Location: UK
Age: 44
Posts: 748
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Quote:
Quote:
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#12 |
Registered User
Join Date: Feb 2012
Location: adelaide
Posts: 44
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I have the same problem on my A1200 1D4, I got the card/adapter from Amigakit...It works great apart from the eratic flashing. It seems like it flashes when it detects any IO...even moving of the mouse pointer.
Anyone know how to fix this? |
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#13 |
Registered User
Join Date: Sep 2012
Location: Dorathea/AT
Posts: 376
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Cf cards vary in what they tell the host controller. Some say are hard drives assumed to be non-removable, some say that they are removable which causes an intermittent "poll" of the channel to see if they have been changed, and I would guess that yours is of the latter type with CPU activity mediating the periodicity.
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#14 |
PSPUAE DEV
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Yet it works fine here when we test them. So its definately the board rev used.
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#15 |
BlizzardPPC'less
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The HDD flashing is downright annoying...I just put some tape on the leds for now.
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#16 |
Posts: n/a
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Mine does this too, using a latest (Escom) motherboard - REV 2B and the CF HDD solution from Amigakit and mine is strobing / flickering / flashing like a goodern - when blanker kicks in it seems to increase it's intensity by a factor of 3 in comparison with an idling machine.
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#17 |
Moderator
Join Date: May 2012
Location: Stockholm / Sweden
Age: 50
Posts: 1,576
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I've tested two different IDE-CF adapters (both cheap ones from ebay) and one of them does this as well. The light blinks all the time, but not as bright as when there are actually IDE IO. Then it lights upp the LED "all the way"
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#18 |
Registered User
Join Date: May 2006
Location: Kilmacolm
Age: 46
Posts: 632
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I have one of Kippers CF adaptors and it will do this if you have the jumpers closed with a card inserted. LED behaves properly when the jumpers are opened. Perhaps he can make an educated guess at what is going on.
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#19 | |
PSPUAE DEV
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Quote:
As the only jumper is master / slave. If this open, then drive will not work at all. As I said it only seems to effect certain motherboards, our test board works fine. |
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#20 |
Unregistered User
Join Date: Sep 2012
Location: Copenhagen / DK
Age: 44
Posts: 4,190
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Kipper2k's CF adapters have two jumpers. One for Master/Slave selection and the other for the LED. If he didn't have that second jumper, it would take longer to boot the machine if there was no CF card installed.
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