On 03/26/2012 06:05 AM, Terry Barnaby wrote:
Hi,
I am using the latest F16 kernel: 3.3.0-4.fc16.i686.PAE and am having
problems with a MicroSD card connected to a USB card reader. This has
been working fine until recently (at least in F14 on the same hardware).
The problem is that "umount" does not appear to be working correctly.
I have an ext3 file system on the card. I can mount it, and I can copy
files to it. However when I use the "umount ..." command it returns
instantly (should sync the files to the card). The system says the card
is unmounted (at least it is not listed with mount, df etc).
However if I run sync, there is a lot of disk activity to the card ...
Also if I try and run "mkfs" it says the device in in use ...
If I mount a blank card it lists the files present on the previous card ...
This sounds like a nasty kernel bug ...
Anyone else seen this ?
I thought I'd noticed something like this with 3.2.x kernels also; I
couldn't narrow it down more than that. In my case, it's a USB external
HDD. After unmounting, I have an old habit of running 3 syncs in one
line. And lately, I've noticed that I don't even get that disk activity
until I give it a second trio of syncs, which certainly doesn't seem right.
Let me check right now with 3.3.0-4... Odd, now I do get the activity
at about the same time as the umount, and no further activity when I
issue the syncs. Seems to be the opposite of what you've reported.
--
J. Randall Owens |
http://www.ghiapet.net/