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Timeline for Running dd. Why resource is busy?

Current License: CC BY-SA 3.0

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Jul 5, 2023 at 6:39 comment added Aaron If '''sudo diskutil unmount''' doesn't work, check here (raspberrypi.stackexchange.com/questions/9217/…)
Feb 21, 2017 at 12:48 vote accept oldhomemovie
Mar 22, 2016 at 14:28 comment added oldhomemovie oh, this is interesting. I'm going to google for kernel locking now. Maybe you have some good resource on your mind where I could read about it?
Mar 22, 2016 at 14:26 comment added thrig @gmile the kernel, as far as I know, locks busy devices, so you need to unmount and eject any partition and image to remove that kernel lock.
Mar 22, 2016 at 14:19 comment added oldhomemovie Hi @thrig, thank you. Yes, I am able to unmount using diskutil, no problem with that. What I'm doing here is I'm learning how to identify problems in the system by saying "Yes" to any warning I can spot. I want to know why "Resource busy" is happening in the first place, not how to get rid of it. What exact process in the OS is making this happen?
Mar 22, 2016 at 14:16 history answered thrig CC BY-SA 3.0