On 09/17/2015 09:18 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...
Not entirely, it should also work having ahci_sunxi.enable_pmp=1 on kernel
cmdline.
Also, you may need to rebuild initramfs by running dracut -f after
modifying modprobe.d files.
So either way I may need to rebuild initramfs? I have yet to get this
right.
I boot with this option. It probably will not work; I will notice this.
Then as root I issue 'dracut -f' then reboot?
No, if you modify kernel command line, you don't need to rebuild initramfs,
since module parameters are read from kernel cmdline.
But if you modify some of files in modprobe.d and impacted module is loaded
in initramfs environment, you need to rebuild initramfs to include those
modifications made in modprobe.d
It only matters if he's booting the OS off the SATA, if it's rootfs is
on MMC and say /home is on SATA is can load it later once root is
switched.
I do want to have /boot and / on one of the sata drives. Eventually. I
havew already tested only having uboot on the MMC and then have the boot
switch to sata. But here there are multiple satas and how will sda be
selected?
In this case:
Can I run with the append and not modify initramfs.
And BTW, with the power demand and other aspects, I am seriously
questioning if this is better than a 1TB internal sata and all the rest
on USB.
I may end up selling this card to someone else who wants to work with it...
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).
_______________________________________________
arm mailing list
arm@xxxxxxxxxxxxxxxxxxxxxxx
https://admin.fedoraproject.org/mailman/listinfo/arm
_______________________________________________
arm mailing list
arm@xxxxxxxxxxxxxxxxxxxxxxx
https://admin.fedoraproject.org/mailman/listinfo/arm
_______________________________________________
arm mailing list
arm@xxxxxxxxxxxxxxxxxxxxxxx
https://admin.fedoraproject.org/mailman/listinfo/arm
--
Pavel Holica
--
Pavel Holica
_______________________________________________
arm mailing list
arm@xxxxxxxxxxxxxxxxxxxxxxx
https://admin.fedoraproject.org/mailman/listinfo/arm
