This is probably a question for James C. I'm concerned that I may have invalidated the verification, or at least created misleading information.
My confession: I couldn't pass up the chance to evolve our "prep-storage.sh" script that is part of XSCE before I lost the exfat formatting. So I tweaked on our script until it recognized and dealt correctly with exfat format. So when I did the "fs-update <os.zd>", the 64GB SD card was already formatted ext4. Do you think that a separate formatting step is necessary, or irrelevant, to the success of fs-update? George On Tue, Jun 18, 2013 at 12:27 PM, George Hunt <georgejh...@gmail.com> wrote: > I followed the suggestions at > http://wiki.laptop.org/go/Release_notes/10.1.0#External_SD -- > substituting 31035o1.zd for the earlier OS64. > > devalias fsdisk /sd/disk@1:0 > fs-update u:\os64.zd > > after the reboot, the "df" command indicated rootfs had a size of 60GB. I > was able to write and read from the command line as olpc and as root. So I > believe that indicates that 64GB drives do work on the XO-1.5. > > George > > > On Mon, Jun 17, 2013 at 10:55 PM, James Cameron <qu...@laptop.org> wrote: > >> On Mon, Jun 17, 2013 at 09:20:20PM -0400, George Hunt wrote: >> > I ordered a 64GB SD, and have it in hand. It is formatted with exfat >> > disk format, apparently a Microsoft proprietary standard. There is >> > a driver for exfat, but it is not shipped with the XO, so there was >> > some truth to the hearsay that 64GB SD cards do not work on the >> > XO. BUT . . . >> > >> > I was able to read exfat formatted "out of the box" transcend 64GB >> > drive on a XO1.5, with a downloaded driver, so I expect that >> > electrical compatibility is already established. >> >> It is the protocol compatibility that causes us problems. There's >> this tiny computer inside the card which has to interoperate with our >> computer. And from what you describe above, you haven't yet tested >> the protocol compatibility with Open Firmware. You have to boot from >> it to test that. >> >> > I think you will want it to be formatted with ext4, because the OS >> > doesn't run on a FAT formated drive. I should caution that I have >> > read that SD cards have an erase block size that makes it important >> > to preserve the partition location and sizing, as the disk format is >> > being erased and reformatted. >> >> If you use the drive for the operating system, there's no need to >> partition or format, because the fs-update of 13.1.0 .zd file will >> create all that is required. Just make sure you use the devalias >> fsdisk ext:0 trick to persuade fs-update to use the external slot. >> >> During boot, the operating system may expand the filesystem to cover >> the rest of the device. >> >> > I do not expect that the "prep-storage.sh" script which is part of >> > XSCE-0.3, will correctly format a 64GB SD card. I do not know >> > whether the XSCE install process will properly function when it is >> > loaded into a 64GB SD. (I expect probably so, since I don't think >> > the OS would know whether it was running on the mother board or on >> > an external SD card). >> >> It must know, and does know. >> >> > I'll experiment with my new SD card, and try to document the results >> > with a script that you can use to format big SD cards. >> >> I suggest gparted for partitioning and formatting. >> >> -- >> James Cameron >> http://quozl.linux.org.au/ >> > >
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