Hi everybody,

How do I put the HDD and CD in DMA mode on SAM ? Hints welcome, thanks

Luca

@lucaricossa

I haven't used the Sam version of 4.1 but you should be able to enable in UBoot prefs in SYS:prefs

@lucaricossa

In U-Boot, just type :

sete sii3114ide_xfer G000
save

And reboot.

That's all ;)

@Rob:
there's no u-boot prefs on Amiga OS 4.1 for Sam ;)

See you later ;)
Laurent aka Faranheit

Last edited by Faranheit on 07-Dec-2008 at 04:57 PM.

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Amedia Computer France
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@Faranheit

shouldn't it be something from AmigaDOS like idetool -x something?
Because after the uboot env changing, idetool still reports pio as transfermode...

@lucaricossa

Have you type the 'save' command in u-boot to save the variable ?

Also, is your hard disk connected to the first serial ata port ?

'idetool -l' just shows the mode used by the hard disk and the optical device.

And take a good look at the result displayed by idetool, it displays at least 2 results :
the first for the harddisk and the second for the optical device, don't forget to extend the shell window to the maximum to see the first one :)

See you later ;)
Laurent aka Faranheit

_________________
ZORAWSKI Laurent
Amedia Computer France
Your Amigadventurer
Mobile : (+33) 7 71 10 72 22
Fax : (+33) 3 87 57 07 21
Mail : laurent@amedia-computer.com
Site : http://www.amedia-computer.com
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MSN

@Faranheit

why isn't DMA set by default? Are there any problems or other issues with SAM & DMA? Is it recommended to set HD and CD to DMA mode?

nexus

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dye 'em black!

Is it possible to even turn off DMA on SATA devices?

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@Yaroze

Its possible to "Turn on" with M-DMA (joke)

@lucaricossa

Quote:

shouldn't it be something from AmigaDOS like idetool -x something? Because after the uboot env changing, idetool still reports pio as transfermode...

On my A1 I have to put the following in my user-startup to force DMA
Quote:

run >nil: c:idetool -x sii0680ide.device 2 67

This forces UDMA3 on device 3 on my sil card.

On a Sam I would imagine you have to sustitute the your ide driver for the above, but as sata only supports one drive per cable the device numbers need to be changed. Have a look in Sys/documentation/IDE for the actual details.

_________________
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A1XEG3-800 [IBM 750FX PowerPC], running OS4.1FE, using ac97 onboard sound.

"There are 10 types of people in the world: those who understand binary, and those who don't."

@Faranheit

Quote:

Have you type the 'save' command in u-boot to save the variable ?

saveenv

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@mwoof

'save' is enough for your information :)

See you later ;)

Laurent aka Faranheit

_________________
ZORAWSKI Laurent
Amedia Computer France
Your Amigadventurer
Mobile : (+33) 7 71 10 72 22
Fax : (+33) 3 87 57 07 21
Mail : laurent@amedia-computer.com
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MSN

@lucaricossa

You can also do it within OS4 using the 'nvsetvar' command, e.g.:

nvsetvar sii3114ide_xfer G00G

Note that there are 4 digits to set, and each digit represents one of the units on the SATA controller (from 0 to 3). In the Sam you normally have HDD on unit 0, and optical as unit 3, and setting G00G will make the fastest possible DMA mode to be used on both your HDD and optical drive.

@COBRA

Be careful, some SlimSata DVD Writers doesn't support the DMA option fully ;)

See you later ;)
Laurent aka Faranheit

_________________
ZORAWSKI Laurent
Amedia Computer France
Your Amigadventurer
Mobile : (+33) 7 71 10 72 22
Fax : (+33) 3 87 57 07 21
Mail : laurent@amedia-computer.com
Site : http://www.amedia-computer.com
Site : http://faranheit.dyndns.org:8080/FPGA%20Arcade/
MSN

@all
thanks to everybody. I will try different solutions

@COBRA

Quote:

You can also do it within OS4 using the 'nvsetvar' command, e.g.:

Not on my OS4, it doesn't exist. Must have been added in with the extra .1.

@Faranheit

Quote:

Faranheit wrote: Be careful, some SlimSata DVD Writers doesn't support the DMA option fully ;)

Were did you get this information from?

All currently available SlimSATA DVD drivers support DMA and it is recommended that you turn on DMA by the manufacturers for correct operation while writing DVDs.

I have seen one or two cheap SATA adapters that have problems with slimDVD drives in general but none with issues limited to mode DMA operation.

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