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Old 10-05-2013, 05:28 PM   #1
Didier Spaier
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trouble booting -current from an USB hard disk (kernel 3.10.14)


I installed Slackware-current dated Thu Oct 3 02:07:13 UTC 2013 on an external USB hard disk.

But it fails to boot. / being an ext4 partition I made an initrd with modules ext4 and usb-storage included, and edited /boot/initrd-tree/wait-for-boot to include 30 instead if 1. When booting it waits 30 seconds but still can't mount / (designated by LABEL=slack in lilo.conf and fstab). After the message from init: "ERROR: No /sbin/init found on rootdev (or not mounted). [...]", cat /proc/partitions doesn't show USB hard disk's partitions, only those on /dev/sda (laptop's internal hard disk).

I built another kernel with ext4 and usb-storage built-in to avoid using an initrd, with "rootedelay=20" in lilo.conf. The kernel says it will wait 20 seconds but after this delay I get a kernel panic. During that time I can unplug and plug in again the USB HDD and I'm sure that it had enough time to settle though.

Any clue appreciated.

Last edited by Didier Spaier; 10-05-2013 at 05:31 PM.
 
Old 10-06-2013, 01:16 AM   #2
philanc
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Quote:
Originally Posted by Didier Spaier View Post
I installed Slackware-current dated Thu Oct 3 02:07:13 UTC 2013 on an external USB hard disk.

But it fails to boot. / being an ext4 partition I made an initrd with modules ext4 and usb-storage included, (...)

I built another kernel with ext4 and usb-storage built-in to avoid using an initrd (...)
Maybe this is a stupid suggestion, but did you include the ehci_hcd (or uhci_hcd or ohci_hcd or xhci_hcd, according to your PC USB ports) usb drivers either in your initrd or built-in in your kernel?

Last edited by philanc; 10-06-2013 at 01:28 AM.
 
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Old 10-06-2013, 04:04 AM   #3
Didier Spaier
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Quote:
Originally Posted by philanc View Post
Maybe this is a stupid suggestion, but did you include the ehci_hcd (or uhci_hcd or ohci_hcd or xhci_hcd, according to your PC USB ports) usb drivers either in your initrd or built-in in your kernel?
Thanks for the suggestion, Philanc. I added ehci_hcd module to the initrd (seems to be the good one), but to no avail, so I'm still in the dark.
 
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Old 10-06-2013, 06:06 AM   #4
Darth Vader
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I have an 500GB USB Harddisk, which I use as Universal Boot From Every Lame Computer Linux, who in reality, is an standard Slackware (today) current, who use a standard generic smp kernel and an initrd generated with:

Code:
KVERSION=3.10.14-smp

KMODULES="usb-storage:xhci-hcd:ehci-hcd:ehci-pci:ohci-hcd:usbhid:mbcache:jbd2:ext4"

ROOTDEV="UUID=2d059afe-0181-46c3-9470-52aef7e3d3f5"
ROOTFS="ext4"

mkinitrd -c -k ${KVERSION} -r $ROOTDEV -f $ROOTFS -m $KMODULES -u -M -w 5 -o /boot/initrd-${KVERSION}.gz
Like you see, I use the UUID variant.

BUT, the interesting thing is there: the real USB driver now, on the current kernels, is not ehci-hcd but the ehci-pci.

PS. No, I do not have to use the i486 kernel in no computer. And yes, I consider the i486 kernel as historical remnant, like any human have an tail remnant.

Last edited by Darth Vader; 10-06-2013 at 06:11 AM.
 
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Old 10-06-2013, 08:28 AM   #5
bormant
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Didier Spaier,
try to add ums_realtek and usb_storage to KMODULES.

Last edited by bormant; 10-06-2013 at 08:42 AM.
 
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Old 10-06-2013, 12:54 PM   #6
philanc
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Quote:
Originally Posted by Darth Vader View Post
BUT, the interesting thing is there: the real USB driver now, on the current kernels, is not ehci-hcd but the ehci-pci
Yes, it looks like ehci_hcd, which used to have no dependencies (at least until 3.2.x) now depends not only on ehci_pci but also on ehci_platform (you may check with modules.dep in your kernel modules directory).

Yes, full steam ahead towards more complexity...
 
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Old 10-06-2013, 02:52 PM   #7
Didier Spaier
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Cool Success

Long story short:
Code:
su
mount -L slack /mnt #slack is the label of /dev/sdb2
mount --bind /proc /mnt/proc
chroot /mnt
cd /boot # probably not necessary
mkinitrd -c -k 3.10.14 -m usb-storage:ehci-pci:ehci-platform:ext4 -u -w 30 -f ext4 -r LABEL=slack
lilo -t -v
lilo
Some tweaking is still needed, but it works (I'm posting from it :-)

Thanks to philanc, bormant and Darth Vader.

Hope this helps some in a similar situation.

Last edited by Didier Spaier; 10-06-2013 at 02:57 PM.
 
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Old 12-12-2013, 02:44 PM   #8
aikempshall
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Didier

Certainly helped me in Slackware 14.1!

On Slackware 13.1, 13.37 and probably a few before that I just added rootdelay=10 to the kernel. This allowed me to boot a external USB hard drive.

I missed out on 14.0 and jumped straight into 14.1 and the rootdelay trick failed to work even though it was still working for 13.37. I then realized that perhaps now I needed an initrd. I played around with building an initrd with modules ehci-hcd, ohci-hcd, uhci-hcd and usb-storage and got all sorts of bizarre problems whilst booting.

Then I fell upon this thread with your solution, worked a treat for me.

So thanks again and to philanc, bormant and Darth Vader.

Alex
 
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Old 04-05-2014, 09:21 AM   #9
dumdadum
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Question any info about a filename I can edit manually?

Quote:
Originally Posted by Darth Vader View Post
I have an 500GB USB Harddisk, which I use as Universal Boot From Every Lame Computer Linux, who in reality, is an standard Slackware (today) current, who use a standard generic smp kernel and an initrd generated with:

Code:
KVERSION=3.10.14-smp

KMODULES="usb-storage:xhci-hcd:ehci-hcd:ehci-pci:ohci-hcd:usbhid:mbcache:jbd2:ext4"

ROOTDEV="UUID=2d059afe-0181-46c3-9470-52aef7e3d3f5"
ROOTFS="ext4"

mkinitrd -c -k ${KVERSION} -r $ROOTDEV -f $ROOTFS -m $KMODULES -u -M -w 5 -o /boot/initrd-${KVERSION}.gz
Like you see, I use the UUID variant.

BUT, the interesting thing is there: the real USB driver now, on the current kernels, is not ehci-hcd but the ehci-pci.

PS. No, I do not have to use the i486 kernel in no computer. And yes, I consider the i486 kernel as historical remnant, like any human have an tail remnant.
Just a little question. Is there a way I can add ehci-pci or at least see what I actually have without ehci-pci and then add it? In other words, is the following line in a particular file that someone can point me to? :
KMODULES="usb-storage:xhci-hcd:ehci-hcd:ehci-pcihci-hcd:usbhid:mbcache:jbd2:ext4"

??

Thanks for the help everyone, it helps me as well, gave you points for the info as a vote...

Cheers,
Dumdadum
 
Old 04-05-2014, 12:01 PM   #10
Didier Spaier
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If you ran mkinitrd then the modules you included are by default in /boot/initrd-tree/lib/modules.

The line
Code:
KMODULES="usb-storage:xhci-hcd:ehci-hcd:ehci-pci:ohci-hcd:usbhid:mbcache:jbd2:ext4"
is not included in a file, it was just typed in a shell as the others you quoted. To know more type
Code:
man mkinitrd
Oh, and I don't need points, thanks.

Last edited by Didier Spaier; 04-05-2014 at 12:05 PM.
 
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Old 04-05-2014, 06:21 PM   #11
dumdadum
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Thumbs up

Quote:
Originally Posted by Didier Spaier View Post
If you ran mkinitrd then the modules you included are by default in /boot/initrd-tree/lib/modules.

The line
Code:
KMODULES="usb-storage:xhci-hcd:ehci-hcd:ehci-pci:ohci-hcd:usbhid:mbcache:jbd2:ext4"
is not included in a file, it was just typed in a shell as the others you quoted. To know more type
Code:
man mkinitrd
Oh, and I don't need points, thanks.
Thanks Mr. Didier, I appreciate your reply. (=

Cheers,
Dumdadum
 
  


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