USB drives not recognized after reboot

USB drives not recognized after reboot

[Steve Bergman]

I am running Fedora Core 6 with the vendor kernel which is 2.6.18.

I have 2 250GB LaCie USB 2.0 drives.

These drives work fine if I power them down and then backup up after the
server is rebooted.

However, if I reboot the server, without powering down the drives, the
server does not see them.

Actually, lsusb does show them as:

Bus 005 Device 005: ID 059f:0651 LaCie, Ltd
Bus 005 Device 004: ID 059f:0651 LaCie, Ltd

However, udev does not notice them and no device files are created.

These are not partitioned, so the correct device file would be /dev/sda
with a major of 8 and and minors of 0 and 16.

If I create the device files manually, 'mount' doesn't see them as  usb
devices.  I believe it says it is not a valid block device, but I'm not
certain of that and cannot test it right now as the server is currently
live.

I need a way to force these drives to be detected at boot up even if I
have to manually force it some way in rc.local.

I'm not certain that this is the proper list for this problem, but udev
seems a reasonable place to start.

Thank you for any assistance.

-Steve 


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Re: USB drives not recognized after reboot

[Patrick Mansfield]

On Wed, Oct 25, 2006 at 05:04:00PM -0500, Steve Bergman wrote:
> I am running Fedora Core 6 with the vendor kernel which is 2.6.18.

You should try to reproduce it with a plain kernel (like 2.6.18) so we
know its not an FC6 specific problem.

> These drives work fine if I power them down and then backup up after the
> server is rebooted.

Compare or post your boot time logs (/var/log/messages or demsg output)
with output seen when the devices are properly detected.

Make sure all the correct modules are loaded, compare your lsmod output
for good and bad cases. You definitely need to have scsi_mod, sd_mod, and
usb_storage loaded.

Logs should show lines like:

Oct 23 11:39:36 sysa kernel: SCSI subsystem initialized
Oct 23 11:39:36 sysa kernel: Initializing USB Mass Storage driver...
Oct 23 11:39:36 sysa kernel: scsi0 : SCSI emulation for USB Mass Storage devices
Oct 23 11:39:36 sysa kernel: usbcore: registered new driver usb-storage
Oct 23 11:39:36 sysa kernel: USB Mass Storage support registered.
Oct 23 11:39:41 sysa kernel:   Vendor: Generic   Model: STORAGE DEVICE    Rev: 9
321
Oct 23 11:39:41 sysa kernel:   Type:   Direct-Access                      ANSI S
CSI revision: 00
Oct 23 11:39:41 sysa kernel: scsi 0:0:0:0: Attached scsi generic sg0 type 0
Oct 23 11:39:41 sysa kernel: SCSI device sda: 4061232 512-byte hdwr sectors (207
9 MB)
Oct 23 11:39:41 sysa kernel: sda: Write Protect is off
Oct 23 11:39:41 sysa kernel: sda: assuming drive cache: write through
Oct 23 11:39:41 sysa kernel: SCSI device sda: 4061232 512-byte hdwr sectors (207
9 MB)
Oct 23 11:39:41 sysa kernel: sda: Write Protect is off
Oct 23 11:39:41 sysa kernel: sda: assuming drive cache: write through
Oct 23 11:39:41 sysa kernel:  sda: sda1
Oct 23 11:39:41 sysa kernel: sd 0:0:0:0: Attached scsi removable disk sda

You can also ls /sys/block or ls /sys/bus/scsi/devices/ to see if the
block layer and scsi core are seeing the devices.

If devices aren't under /sys, it's not a udev issue.

> Actually, lsusb does show them as:
> 
> Bus 005 Device 005: ID 059f:0651 LaCie, Ltd
> Bus 005 Device 004: ID 059f:0651 LaCie, Ltd
> 
> However, udev does not notice them and no device files are created.
> 
> These are not partitioned, so the correct device file would be /dev/sda
> with a major of 8 and and minors of 0 and 16.
> 
> If I create the device files manually, 'mount' doesn't see them as  usb
> devices.  I believe it says it is not a valid block device, but I'm not
> certain of that and cannot test it right now as the server is currently
> live.
> 
> I need a way to force these drives to be detected at boot up even if I
> have to manually force it some way in rc.local.
> 
> I'm not certain that this is the proper list for this problem, but udev
> seems a reasonable place to start.

More likely a kernel usb mass storage or scsi problem, if all modules are
loaded and you can reproduce on mainline kernel post logs showing the
problem to linux-usb-devel@lists.sourceforge.net and
linux-scsi@vger.kernel.org

-- Patrick Mansfield

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Re: USB drives not recognized after reboot

[Steve Bergman]

On Wed, 2006-10-25 at 17:12 -0700, Patrick Mansfield wrote:

> You should try to reproduce it with a plain kernel (like 2.6.18) so we
> know its not an FC6 specific problem.
> 

> Compare or post your boot time logs (/var/log/messages or demsg output)
> with output seen when the devices are properly detected.
> 
> Make sure all the correct modules are loaded, compare your lsmod output
> for good and bad cases. You definitely need to have scsi_mod, sd_mod, and
> usb_storage loaded.
> 

> More likely a kernel usb mass storage or scsi problem, if all modules are
> loaded and you can reproduce on mainline kernel post logs showing the
> problem to linux-usb-devel@lists.sourceforge.net and
> linux-scsi@vger.kernel.org


The problem appears to be that usb_storage is not getting loaded when
the system boots.  It does get loaded on demand if the drive is powered
off and then back on.  So I guess linux-usb-devel would be my next stop?

I have things "working" by putting a script that loads usb_storage
in /etc/sysconfig/modules/.

It still isn't ready when the system tries to automatically mount it
from fstab, but a mount command in /etc/rc.local works.  Ugly, but it
will do for now.

Thanks,
Steve




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Re: USB drives not recognized after reboot

[Patrick Mansfield]

On Wed, Oct 25, 2006 at 10:04:50PM -0500, Steve Bergman wrote:
> On Wed, 2006-10-25 at 17:12 -0700, Patrick Mansfield wrote:

> > Make sure all the correct modules are loaded, compare your lsmod output
> > for good and bad cases. You definitely need to have scsi_mod, sd_mod, and
> > usb_storage loaded.
> > 
> 
> > More likely a kernel usb mass storage or scsi problem, if all modules are
> > loaded and you can reproduce on mainline kernel post logs showing the
> > problem to linux-usb-devel@lists.sourceforge.net and
> > linux-scsi@vger.kernel.org
> 
> 
> The problem appears to be that usb_storage is not getting loaded when
> the system boots.  It does get loaded on demand if the drive is powered
> off and then back on.  So I guess linux-usb-devel would be my next stop?

It could be a udev cold plug problem, I don't know various cold plug
details and don't even have FC6 installed.

Try fedora-test-list@redhat.com

-- Patrick Mansfield

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Re: USB drives not recognized after reboot

[David Zeuthen]

On Wed, 2006-10-25 at 22:04 -0500, Steve Bergman wrote:
> The problem appears to be that usb_storage is not getting loaded when
> the system boots.  It does get loaded on demand if the drive is powered
> off and then back on.  So I guess linux-usb-devel would be my next stop?

I think this is due to the some unfortunate interactions described here

 http://zaitcev.livejournal.com/93621.html

Please report this in the Red Hat bugzilla so Pete gets some more
incentive to, uhm, fix this. Thanks!

    David



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