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> Odd Sd-mmc Behavior
etrigan
post Feb 12 2007, 05:43 AM
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hmmm... 2 posts within 12 hrs. not my usual... : )

after having installed the 0.8.2 pdaxQtrom (base, apps, zgcc, java, open office) i've been experiencing some odd behavior of my 4Gb SD card. notably, it is inconsistently mounted, and after going to 'sleep' or closing the clamshell on my 3100, it is no longer recognized by the system -- almost as if it were 'unmounted'.

if i uninstall the sdmmc-module-2.4.20; this behavior does not occur with a 16, 32 or 512Mb SD card. when i reinstall the module -- the behavior occurs with all 3 cards (and the 4gb card...)

any thoughts on how i might troubleshoot this?

(btw -- if i haven't said this before; thanks so much for all the folks who put in the hard work and time on making the zaurus such a GREAT tool. my only wish would be for internal wireless... but, having said that, imho, its a nearly perfect device and the community is a pleasure!)
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etrigan
post Feb 18 2007, 09:52 AM
Post #2





Group: Members
Posts: 21
Joined: 31-August 05
Member No.: 8,003



more...

i think i may have identified a part of the problem. i have several copies of /etc/sdcard/sd_mem_ctrl of several different sizes and dates. the older file was 4110bytes while the newer file was 4240bytes.

the dates correspond to the days that i uninstalled/reinstalled the updated sd_mmc*.ipk. when i renamed the oldest sd_mem_ctrl.bak file to sd_mem_ctrl and inserted my 4Gb SD card -- the zaurus recognized/mounted the card. it worked all evening, til i put the z to sleep -- at which point, the card was no longer recognized (despite repeated re-insertion/reboot/etc/etc).

so.. when i checked the /etc/sdcard/sd_mem_ctrl file, it was now the 4240byte, newer version. when i deleted the 'newer' file, then copied the older .bak file to sd_mem_ctrl -- i reinserted the sd card --- and, voila! joy.

so... something appears to be rewriting/overwriting/changing... the sd_mem_ctrl file before/during/after 'sleep'. which prevents the card from being subsequently recognized/remounted.

i am not smart enough to figure out what else is going on; but, i continue to read/learn....
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