On 09/17/2015 06:53 AM, Peter Robinson wrote:
On Wed, Sep 16, 2015 at 10:00 PM, Robert Moskowitz <rgm@xxxxxxxxxxxxxxx> wrote:
I went searching for information on sata port multiplier and found:
http://www.spinics.net/lists/arm-kernel/msg377619.html
Is this still the status of this and if so how do I set AHCI_HFLAG_NO_PMP to
true?
Well if you read the message you reference it states:
"So add a module parameter to enable pmp usage, and default this to off, so
that directly attached disks keep working normally."
So it seems if you use a multiple you need to do a different option
than without so it indicates it would need it. If you do "modinfo
ahci_sunxi" you'll see that actually the patch has landed and there is
a enable_pmp parameter. So you'll need to create something like
/etc/modprobe.d/sunxi.conf and add a line "options ahci_sunxi
enable_pmp=1" line (no I've not verified that is correct so you'll
need to check it) and reboot.
Ah, thanks! I will try that. I was looking at:
/boot/extlinux/extlinux.conf and adding to the append line something like:
AHCI_HFLAG_NO_PMP=0
So I would have been heading in the wrong direction...
Peter
But it seems there were more messages about this...
On 09/16/2015 03:34 PM, Robert Moskowitz wrote:
I figured out the various ports on the muitiport card and have 2 sata
drives I am testing with.
One drive works fine. But two drives it is a bit of a guess which one
will come in as /dev/sda (the mSD card is /dev/mmcblk0). And only one drive
is visible. Or at least gparted is only seeing one.
From messages back last fall? I had that this board would let me use
multiple sata drives, so there seems to be something I am missing.
Right now each item has its own power supply: Cubietruck, Multiport card,
Drive1, and Drive2. So it is not a power issue (or shouldn't be).
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