Hello all,
We've recently released a new SD card driver, it provides faster write
speeds and support for larger SD cards.
We've received reports recently that SD write speeds were very slow. We
found the write speeds varied depending upon the SD card. We measured
write speeds from 33KB/s to 1MB/s, using an ext2 filesystem with contiguous
writes. Running the same tests on the same SD cards with the new
driver we've measured write speeds are around 1.5MB/s. In addition to
faster write speeds large SD cards are supported. In the original driver
SD cards up to 1GB were supported, in the new driver SD cards up to 4GB
are supported.
The new SD driver can be downloaded here
ftp://oz.embeddedarm.com/tmp/sdcard.o
If you are using a TS-7300 or TS-7400 the bootrom will also need to be
updated. You can download a utility to do this here
ftp://oz.embeddedarm.com/tsbootrom-update. To update your bootrom you
can run the following command on your TS-7300 or TS-7400.
tsbootrom-update -s
To update your sdcard driver on a TS-7300 or TS-7400 you can copy the
driver to your SD card, FTP it up, or use wget. You will then need
to copy the driver to the initial ramdisk as well as the /lib/modules.
e.g.
#Download the driver and utility
:root# wget -q ftp://oz.embeddedarm.com/tsbootrom-update
:root# wget -q ftp://oz.embeddedarm.com/tmp/sdcard.o
#verify the md5sums match
:root# md5sum sdcard.o
192b5815a54bbeb33a8c8bb6e994382e sdcard.o
:root# md5sum tsbootrom-update
fa73d32fbdec4af1a369a3ead5cdace3 tsbootrom-update
#update the bootrom
:root# tsbootrom-update -s
verifydat=0x5ef72b7
lockdat=001073646c6f636b7465737473646c6f636b5e0e
verifylen=0
mac="00:d0:69:40:62:a2"
#update the sdcard driver
:root# mount /dev/sdcard0/disc0/part2 /mnt/
:root# cp sdcard.o /mnt/
:root# cp sdcard.o /lib/modules/2.4.26-ts11/kernel/drivers/block/
At this point your SD card driver is up to date as well as your bootrom.
If you have any questions or problems let me know.
//Eddie
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