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Thread: Yamaha SCSI-IDE v769970 supported CF card list

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    Default Yamaha SCSI-IDE v769970 supported CF card list

    Seeing as there's quite a few of us with these devices now (cheers Frodegh!) it's worth saving frustration by listing what does and does not work:

    Known working:
    - Samsung 1GB CF (rebranded as PureMedia 1GB CF)
    - Samsung 2GB CF (rebranded as Jessops 2GB)

    Known NOT working:
    - Transcend 2GB 133x CF
    - SanDisk Extreme III 256MB CF
    - SanDisk 512MB CF

    Transcend and SanDisk 512MB both lock the SCSI bus completely, with inquiry light constantly on. These are the only two cards that support DMA
    The SanDisk Extreme does not support DMA (!), but does not support IORDY.

    The cards that work:
    - Do not support DMA of any type whatsoever
    - Do support IORDY signal
    - are all marked as removable

    DMA card? Locks the bus.
    No IORDY support? returns incomplete information when polling drive.

    Code:
    Name                      Works  DMA  IORDY  Rem? Notes
    ----------------------------------------------------------------------------------
    Sandisk extreme 256         N     N     N     Y    Returns incomplete info on disk poll
    Sandisk 512MB               N     Y     Y     Y    Locks SCSI bus
    Transcend 1GB 133x          N     Y     Y     Y    Locks SCSI bus
    Samsung 1GB (PureMedia)     Y     N     Y     Y    Works
    Samsung 2GB (Jessops)       Y     N     Y     Y    Works
    Attached Files Attached Files
    Last edited by chiark; 27th September 2011 at 09:54.
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    Great initiative! I'm curious to see if there is any logic to which CF cards work or not.

    Over IDE it can make a difference if they are of fixed or removable type, but it depends on the driver.
    Scsi.device and compactflash.device does not care if a card is removable or fixed, but IDEfix97 and drivers for Individual computers IDE controllers only work with fixed cards, as they mistake removable drives for ATAPI devices.

    If you run windows diskpart with your CF cards on IDE or SATA (not USB!) and type 'list volume' you will see if a card is 'removable' or 'partition' (=fixed).

    It would be nice to know if this plays a role when connected over SCSI.

    Edit: It would also be nice to know if a non-working card works well over IDE!

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    Yep, the odd thing is all the cards work fine on the native IDE!
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    Quote Originally Posted by chiark View Post
    Yep, the odd thing is all the cards work fine on the native IDE!
    Ok. Could you try them on the pc as bescribed above to see if they are removable or fixed type?
    If your SanDisk and Transcend are removable and the Samsung fixed, there would be a pattern already..
    But I guess that's a bit optimistic

    (I might be up to the different drivers how they handle this for SCSI as well..)

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    They're all marked as removable... Curioser and curioser.

    I suspect the way they respond to drive inquiry would be markedly different, but I can't find a tool that will allow me to do that for Windows or MacOS...

    ---------- Post added at 09:47 ---------- Previous post was at 09:09 ----------

    Trying DSKPROBE... But what I really want is something that discloses more information about the response to the drive inquiry.

    Drive type DRIVE PHYSICAL_DEVICE
    name; Sec size/sec trk/trk cyl/cyl
    Sandisk 256:512/63/255/31
    Samsung 1GB 512/63/255/127

    Are there any tools that show the raw inquiry results?

    ---------- Post added at 10:13 ---------- Previous post was at 09:47 ----------

    ...and that don't require to boot from a DOS diskette?

    ---------- Post added at 11:16 ---------- Previous post was at 10:13 ----------

    OK, wading through the ATA specs...

    I want a tool that simply shows me the results of IDENTIFY_DEVICE (Opcode EC)

    Preferably with some interpretation, but that's not mandatory...

    ---------- Post added at 11:34 ---------- Previous post was at 11:16 ----------

    Damn, found something (bus tools) but it seems that the information returned is largely concerning the USB controller rather than the disk.

    Looks like I'll have to set up a PC, hook the CF to the internal IDE port and use one of the boot disks.

    Not a problem, but it won't happen today!
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    Just to make sure: You connected the CF card to your PC with the IDE-CF adapter, not a USB reader? (When connected with USB all cards report as removable.)

    Talking about identify_device, I never used any such tool, so can't help there.
    However I did read the other day that ATA-2 expanded the identify_device command, to accept ATAPI devices etc, and I think that would explain why ATAPI compatible amiga IDE drivers fail with removable CF cards.

    Edit: Ah, you just posted again. Yes, you need to use the cards over IDE to be able to study anything.

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    Cheers Frode. I have a handy mini-itx board that can serve for this purpose... In fact I might even have an old file server with PSU somewhere so it shouldn't be too difficult!
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    OK, a couple of hours of testing...

    I think there might be a pattern, but could do with a little more testing.

    It seems that for a card to work, it must not support DMA, but it must support the IORDY signal.

    Supports DMA = locks the SCSI bus.
    Does not support IORDY = returns incomplete data for inquiry

    Magic combination: no dma, support for IORDY...

    Anyone corroborate this?
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    Good job Chiark, that's some serious research there!

    What is the name of the software you use for this?
    I will try to make a bootable USB stick to try it out with my cards. (A: is long gone...)

    As for IDE, I think the SCSI drivers might also play a role in this, so it might not be up to the Yamaha alone..

    According to this post prepping the card on IDE for use on SCSI might make sense as well.
    (Author had the 'read drive information' feature in hdtoolbox fail when connected over SCSI, but the card worked fine on SCSI once prepared on IDE)
    Last edited by fgh; 28th September 2011 at 01:15.

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    Ultimate Boot CD, and I'm using ATAINF and DISKINFO...
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