On Fri, Feb 4, 2011 at 8:48 AM, Helmut Jarausch <jarau...@igpm.rwth-aachen.de> wrote: > On 02/02/2011 04:48:40 PM, Paul Hartman wrote: >> On Mon, Jan 31, 2011 at 3:43 AM, Helmut Jarausch >> <jarau...@igpm.rwth-aachen.de> wrote: >> > Hi, >> > >> > since a few weeks I have a strange effect with my USB stick. >> > >> > According to fdisk there is one partition on it >> > /dev/sde1 38 7839719 3919841 b W95 FAT32 >> > >> > which I haven't changed for a long time. >> > >> > Whenever I insert this stick, the kernel log shows >> > /dev/sde but not /dev/sde1 (and there is no file /dev/sde1) >> > >> > After Invoking fdisk /dev/sde with a simple 'p' command but nothing >> > else, this device shows up. >> > >> > Has anybody an idea what's going on here? >> >> I have a USB SD-card reader which cannot read the partition table >> when >> first inserted into the PC. But, if I issue "hdparm -z /dev/sdg" then >> the kernel re-reads the partition table and everything works fine >> after that. You can try it, maybe it'll work for you, too. > > Thanks Paul and all other who tried to help. > Sorry for my late reply, I have been too busy. > > My situation seems special. > > - the card reader is 2 years old (builtin) > - the stick is about 1 year old > > 2 of my 3 USB stick work just fine > > up to kernel 2.6.36-? the stick in question > has worked definitely. > Probably since kernel 2.6.37 this one shows the mentioned problems. > > Paul's advice above works just fine! > So, I think it's a timing problem as Paul has suggested in a later > mail. Where can I set the delay_use option of usb-storage to a higher > value?
I think you must first ensure usb-storage is built as a module, then create a file /etc/modprobe.d/usb_storage with these contents: options usb_storage delay_use=5 That would set the delay to 5 seconds. And you may need to run update-modules after changing that file. I haven't tried it yet and that's based on my memory as I'm using a Windows computer at the moment... Good luck!
