hi thought about doing the same, mostly for data space needs, as the internal SSD gets satured fast once you install a desktop.
What about performance ? (data transfer) on SD compared to the internal SSD ?

The internal SSD gets somewhere between 16 and 25MB/s - the SD card performance depends on your SD card. I have a couple here that go up to 16MB/s and one that gets 6MB/s. Just get the biggest "Class" number you can. The number directly relates to how many MB/s are guaranteed for a read operation, however writes may be very slow regardless. It is a bit hit and miss. You probably won't notice the difference except for on very large writes, Linux will cache the hell out of everything, but the SD card will take a lot longer to finish synchronizing than the PATA SSD.

It's all NAND flash at the end of the day, so your experience should be very similar.

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Matt Sealey

there are different sd crard class

from wikipedia i tested with a class 4 sd card (written 15Mo/s in french means 15Mbytes/sec ...) and it's quite fast for data transfer. The main system is still on the ssd but the web app and the attached documents are on the sd card (not the mysql data though).

He

i have some problems installing from scratch

i have udes a 2 Gb SD card and a 4 Gb sdhc one
bothe either formtatted in Fat 32 or ext2

i have downloaded the installer image and then on my last attempt on a brand new and formattaed fat 32 card a installed the image

notice the dcfldd with sudo works (i have a permission error if i don't) and statusintervall have to be without the - (on ubuntu karmic)

then i reboot the efika mx with the sd card inside but i still boot on the ssd system...
did i forgot something ?

Thanks

Formatting the SD card doesn't matter as the SD image will overwrite everything with a new partitioning scheme and two partitions: a small FAT32 partition at the front (for the boot uImage) and an ext4 filesystem for the installer root. Essentially the process of copying the image to the card formats it for you.
That's normal. Any raw disk access needs more than standard user privileges.
Are you sure it booted into the SSD system? The one on the SSD as it gets shipped and the one on the SD card are absolutely identical so unless you installed some new stuff on the SSD that uniquely identifies it (like a desktop), you won't see the difference..

Did you check the SD card to make sure it actually has anything on it?

With the SD card inserted and it booted from SSD, can you "cat /proc/partitions" and post the output here?

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Matt Sealey

yes i checked i changed the oem password for a more robust one, and this is the good one. Noob but so much :-) (or at least try not to be)

No i didn't ;-) i 'll do it back home within half an hour
8 0 3767904 sda
8 1 32098 sda1
8 2 3735112 sda2
179 0 1931264 mmcblk0
179 1 1927768 mmcblk0p1
8 16 1974272 sdb
8 17 1974231 sdb1
8 48 488386582 sdd
8 49 488384001 sdd1

i have a usb key(2Go) on one port and hdd usb drive (500 Go) on the other port, but i did boot as they were unplugged

Thanks for your help.

back home i can't mount that damn sd card :-(
and with gparted i have a "unknown file system"

the dd command worked fine without errors
though.

Thanks for your help ;-)

You're running it as a network server right? Otherwise changing the password isn't such a problem.
This is wrong. There should be two partitions - mmcblk0p1 and mmcblk0p2. I see your problem; you wrote the SD image to the first partition and not the whole block device.

When writing you should use /dev/sdx (where your SD card pops up) or /dev/mmcblk0 in the list above if you use the Efika. Don't use /dev/sdx1 or /dev/mmcblk0p1!

I really would recommend using the Efika to write the SD card then you can't make a mistake as to which is the big SD card slot (it's always mmcblk0). Many a time I've accidentally written over the wrong SCSI disk..

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Matt Sealey

There is a ssh access for oem so i changed the password because oem was obvious.


Yes indeed this is the error i made :-(

I'll try asap (tomorrow).

Thanks for your support

NG

Ok it works fine by now, it started back on the sd card thanks a lot .

NG

Great :)

Hopefully the next flash toolkit we publish will run under Linux and make this much, much easier.

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Matt Sealey