Hi Greg,
In one of my imx6 based Board when I connect USB Disk first time everything work's ok and I can read/write content from USB Flash Driver but when I do eject and connect again I could see below continuous messages from dmesg and disk never mounted.218.431346] FAT-fs (sda): Directory bread(block 480) failed
<3>[ 218.431362] FAT-fs (sda): Directory bread(block 481) failed
<3>[ 218.431374] FAT-fs (sda): Directory bread(block 482) failed
<3>[ 218.431386] FAT-fs (sda): Directory bread(block 483) failed
<3>[ 218.431398] FAT-fs (sda): Directory bread(block 484) failed
<3>[ 218.431420] FAT-fs (sda): Directory bread(block 485) failed
<3>[ 218.431432] FAT-fs (sda): Directory bread(block 486) failed
<3>[ 218.431444] FAT-fs (sda): Directory bread(block 487) failed
<3>[ 218.431466] FAT-fs (sda): Directory bread(block 488) failed
<3>[ 218.431478] FAT-fs (sda): Directory bread(block 489) failed
<3>[ 218.431499] FAT-fs (sda): Directory bread(block 490) failed
<3>[ 218.431515] FAT-fs (sda): Directory bread(block 491) failed
<3>[ 218.431528] FAT-fs (sda): Directory bread(block 492) failed
<3>[ 218.431540] FAT-fs (sda): Directory bread(block 493) failed
<3>[ 218.431551] FAT-fs (sda): Directory bread(block 494) failed
<3>[ 218.431563] FAT-fs (sda): Directory bread(block 495) failed
<3>[ 218.431592] FAT-fs (sda): Directory bread(block 496) failed
<3>[ 218.431604] FAT-fs (sda): Directory bread(block 497) failed
<3>[ 218.431616] FAT-fs (sda): Directory bread(block 498) failed
<3>[ 218.431627] FAT-fs (sda): Directory bread(block 499)
Sanjeev Sharma
On Wed, Jun 18, 2014 at 12:09 PM, Greg KH <greg@xxxxxxxxx> wrote:
On Wed, Jun 18, 2014 at 06:26:23AM +0000, Ranjith T. C. wrote:
> Thanks for the reply.
>> What I meant is whether it could be could be an of the USB controller driver or the hardware?
> > What exactly do you mean by this?
>
It could be both. Or a bad cable, or bad connection.
Try putting some debugging code in the Linux device side and see what
that is telling you is happening.
Try plugging the device into different operating systems with different
types of host controller hardware to see if it is a timing issue.
Good luck,
greg k-h
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