Hi again,
Is this the wrong mailing list to ask about throughput issues with
linux card reader drivers in general?
If it is not, please point me to the right list.
Best regards, Clemens
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Just a short follow-up:
The card (Samsung SD Pro 16GB) the internal O2 card reader writes to
sequentially at 4.2mb/s handles 14.4 mb/s in the raspberry pi (and
about 30mb/s in the O2 + windows 7):
Raspberry:
> ce@raspberrypi:~# dd if=/dev/zero of=/dev/mmcblk0 conv=fsync bs=4M count=256
> 10737418
Unfourtunately, nobody answered my question regarding UHS support for
O2 Micro, Inc. OZ600FJ0/OZ900FJ0/OZ600FJS.
I also didn't find any specifics on the internet, that was the reason
I asked here.
Does the sdhci_pci driver not support UHS at all, or is it not
supported for this controller only?
Is
Hello,
My Dell latitude has an integrated O2 Micro SDHC card reader, listed
by lspci as:
0a:00.0 SD Host controller: O2 Micro, Inc. OZ600FJ0/OZ900FJ0/OZ600FJS
SD/MMC Card Reader Controller (rev 05)
So far I was happily using it with cheap/slow SDHC cards.
However recently I bought a "Samsung SDHC
Hi Ulf,
> Have the mmc host driver setup MMC_CAP_ERASE? That is needed,
> otherwise the block queue wont be supporting DISCARD operations.
Thanks a lot for your reply. Indeed it seems MMC_CAP_ERASE is not
supported by the raspberry pi driver.
Just to be curious: Is the erease command also support
Hi,
I've read several reports of raspberry pi users which were able to
perform batch discards on their SD cards by invoking the "fstrim"
command, which in turn should be translated to an ERASE command
(cmd23). I found out some patches where commited to linux-mmc which
implement this functionality
