[SOLVED] Unplugging a memory card after sync command.

stf92 · 02-21-2012, 05:22 PM

Kernel 2.6.21.5, Slackware 12.0

Hi:
When I have written data to a floppy disk I have, afterwards issued

# umount /media/floppy

The prompt immediately appears but I have not ejected the floppy until the LED on the floppy disk unit turns off. Now, I have a memory card connected through USB, the card in not mounted and I issue

# dd bs=4M if=./some_file.img /dev/sda

where /dev/sda is the memory card. When I get the prompt back, I do

# sync

If I now unplug the card immediately after getting the prompt, do I do well?

business_kid · 02-22-2012, 11:44 AM

I don't think so. The terminal may return while the write is finishing, and an immediate whip out might disturb stuff. Give it 5 seconds at least

stf92 · 02-23-2012, 12:34 PM

Thanks for your useful post.

business_kid · 02-23-2012, 12:47 PM

On mature recollection (a loaded political phrase in these parts), the umount does a sync, so you may be all right. It's the immediate hardware pull I would be afraid of.

The historic trivia:
on-mature-recollection

stf92 · 02-24-2012, 08:54 PM

Thanks again.