Re: Attempting to re-purpose former XO 1.5 4GB microSD cards.
On 09/16/2012 09:57 PM, Kevin Gordon wrote: Therefore, I fear that I must have been an ESD devil this morning when I took the cards out of the machine, and fried them by not taking recommended precautions. I can think of no other plausible reason. But, it appears it's just these two cards, and not the process. Next time, no skipping the wrist strap. Sorry for the bother. Aaargh .. but thanks again for answering quickly and adding even more doisk management tools to the arsenal. I doubt it was ESD. Rather I suspect you were hit with what our manufactures called an SPO or sudden power off. I suspect the card power bounced while the FTL was moving some blocks around. You don't actually have to remove the card for this to happen as the power to the card socket is software controlled. We dealt with this numerous times while qualifying SD cards. The EC in the XO keeps the power up on the SD card for several seconds after the main power it turned off to help prevent this from happening. -- Richard A. Smith One Laptop per Child ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: OLPC build creation failed
I agree, the ratio between emulation and native is not so great, it is only around 2:1. Having fast I/O attached to your emulator host would compensate to some degree. For those with slow or unreliable internet, it may be faster to do a build in emulation than to use an XO-1.75 over SSH followed by copying the build. The work flow and techniques of batch processing can be used. You can easily increase the number of builders by adding cheap systems, or more emulators on an SMP system, and start a new builder as soon as you have a new change, without waiting for the previous builders to finish. Don't let the good be the enemy of the perfect. -- James Cameron http://quozl.linux.org.au/ ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Attempting to re-purpose former XO 1.5 4GB microSD cards.
On Sun, Sep 16, 2012 at 8:47 PM, James Cameron wrote: > I've never had any trouble. The supplied microSD cards are readily > repartitioned and reformatted. Check that you didn't repartition the > wrong device? > Thanks Mikus, James and Wad. I decided to figure from the responses, that I wasnt as stupid as I look process-wise, and tried the suggestions and made sure I was doing the 'right' partitions. No go. So, I did the old, well let's go back to a known state. So I put these two cards back into an XO 1.5. A) They didn't boot, and B) they wouldnt re-flash. I then picked another random XO 1.5 with a 4GB card, did the same process, and lo and behold, the 4GB SD card repartioned and formatted without a problem. Therefore, I fear that I must have been an ESD devil this morning when I took the cards out of the machine, and fried them by not taking recommended precautions. I can think of no other plausible reason. But, it appears it's just these two cards, and not the process. Next time, no skipping the wrist strap. Sorry for the bother. Aaargh .. but thanks again for answering quickly and adding even more doisk management tools to the arsenal. KG > -- > James Cameron > http://quozl.linux.org.au/ > ___ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel > ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Attempting to re-purpose former XO 1.5 4GB microSD cards.
I've never had any trouble. The supplied microSD cards are readily repartitioned and reformatted. Check that you didn't repartition the wrong device? -- James Cameron http://quozl.linux.org.au/ ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Attempting to re-purpose former XO 1.5 4GB microSD cards.
No idea. I've done that any number of times with no problem from XOs, and even my Mac. wad On Sep 16, 2012, at 2:52 PM, Kevin Gordon wrote: > Folks: > > I am to understand that any upcoming m/b upgrade to an XO 1.5 will perhaps > come with an 8GB card, thus making the old 4GB card superfluous. As such, I > figured I would run an attempt at repurposing them. > > So in anticipation, I've taken out two (working perfectly) microSD 4GB cards > from a couple of test 1.5's, placed 8Gb cards in the machines, re-flashed > them, and all is good on those XO boxes with the new cards > > I then take the removed 4GB cards over to my Fedora 17 box and try to > reformat them. I must be doing something wrong, or have missed some basic > info - and, no, I am in as su, and the cards are not in hardware read-only > switched adapters :-) > > I've tried parted, fdisk, then tried diskutil over on a Mac, Ubuntu. and yes, > even disk manager on Windows. I cant seem to find any way to delete the 2 > linux partitions and make just one big happy fat32 partition on either card, > on any machine, using any software. On Fedora, fdisk seems to let me delete > the partitions: i choose, i delete 1 & 2, i write, i look and it says there > are no partitions. But lo and behold, when I reboot as suggested, they > 'reappear'. I even tried on an F11 and F14 box too. gparted shows them > successfully deleted, then on the post-op rescan, they're back.Am I > missing something basic? I have happily formatted and reformatted, > partitioned, resized, and otherwise intialised many other (non-former XO > boot) SD cards with linux/fat32/linux-swap partitions on all of these > machines; but. alas I now feel all newbie again. > > Cheers > > KG > > > ___ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Attempting to re-purpose former XO 1.5 4GB microSD cards.
Folks: I am to understand that any upcoming m/b upgrade to an XO 1.5 will perhaps come with an 8GB card, thus making the old 4GB card superfluous. As such, I figured I would run an attempt at repurposing them. So in anticipation, I've taken out two (working perfectly) microSD 4GB cards from a couple of test 1.5's, placed 8Gb cards in the machines, re-flashed them, and all is good on those XO boxes with the new cards I then take the removed 4GB cards over to my Fedora 17 box and try to reformat them. I must be doing something wrong, or have missed some basic info - and, no, I am in as su, and the cards are not in hardware read-only switched adapters :-) I've tried parted, fdisk, then tried diskutil over on a Mac, Ubuntu. and yes, even disk manager on Windows. I cant seem to find any way to delete the 2 linux partitions and make just one big happy fat32 partition on either card, on any machine, using any software. On Fedora, fdisk seems to let me delete the partitions: i choose, i delete 1 & 2, i write, i look and it says there are no partitions. But lo and behold, when I reboot as suggested, they 'reappear'. I even tried on an F11 and F14 box too. gparted shows them successfully deleted, then on the post-op rescan, they're back.Am I missing something basic? I have happily formatted and reformatted, partitioned, resized, and otherwise intialised many other (non-former XO boot) SD cards with linux/fat32/linux-swap partitions on all of these machines; but. alas I now feel all newbie again. Cheers KG ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
