Re: Re: [FSO] losetup trouble
Wiadomość Oryginalna Od: Alex Osborne [EMAIL PROTECTED] Do: List for Openmoko community discussion community@lists.openmoko.org Data: 4 października 2008 4:24 Temat: Re: [FSO] losetup trouble Hello, On 04/10/2008, at 2:51 AM, rhn wrote: [EMAIL PROTECTED]:/media/card# touch /dev/loop0 [EMAIL PROTECTED]:/media/card# losetup /dev/loop0 bigfile losetup: /dev/loop0 [EMAIL PROTECTED]:/media/card# ls -l /dev/loop0 -rw-r--r--1 root root0 Oct 3 16:31 /dev/loop0 I'm surprised losetup didn't complain. There's not much point in making loop0 a regular file. I have not tried usb storage but: pico:~# ls -la /dev/loop0 brw--- 1 root root 7, 0 Oct 4 12:08 /dev/loop0 pico:~# dd if=/dev/zero of=foo bs=1k count=1k 1024+0 records in 1024+0 records out 1048576 bytes (1.0 MB) copied, 0.208113 s, 5.0 MB/s pico:~# mke2fs foo mke2fs 1.41.1 (01-Sep-2008) [...] pico:~# mkdir /mnt/tmp pico:~# mount -o loop foo /mnt/tmp/ pico:~# ls -la /mnt/tmp/ total 17 drwxr-xr-x 3 root root 1024 Oct 4 12:12 . drwxr-xr-x 5 root root 4096 Oct 4 12:12 .. drwx-- 2 root root 12288 Oct 4 12:12 lost+found pico:~# mount | grep foo /root/foo on /mnt/tmp type ext2 (rw,loop=/dev/loop0) I imagine normally /dev/loop* should be created by udev. The fact that it doesn't exist might indicate that you don't have loopback device support in your kernel. Check this: pico:~# grep loop /proc/devices 7 loop If it's not there try modprobe loop. If it is there, delete your bogus /dev/loop0 and recreate it like this: mknod /dev/loop0 b 7 0 Cheers, Alex ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community Thanks! It seems I didn't have the loop module in the kernel. I was sure the device files are created by losetup and the loop support was compiled in the kernel (it was not shown in lsmod). As soon as the repo is back online, I'm going to retry and post the results here. Cheers, rhn ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
[FSO] losetup trouble
Hi I've encountered trouble trying to create a loopback device to use with usb_storage module instead of the card. Here are my problems: [EMAIL PROTECTED]:/media/card# losetup /dev/loop0 bigfile losetup: /dev/loop0: No such file or directory [EMAIL PROTECTED]:/media/card# touch /dev/loop0 [EMAIL PROTECTED]:/media/card# losetup /dev/loop0 bigfile losetup: /dev/loop0 [EMAIL PROTECTED]:/media/card# ls -l /dev/loop0 -rw-r--r--1 root root0 Oct 3 16:31 /dev/loop0 bigfile is the file I wanted to mount. I also tried to mknod /dev/loop0 with the major and minor guessed from the desktop's ones: [EMAIL PROTECTED]:/media/card# mknod /dev/loop2 b 7 1 [EMAIL PROTECTED]:/media/card# losetup /dev/loop2 bigfile losetup: /dev/loop2: No such device or address What can be done about it? Or maybe some usb storage module supports exposing directories instead of devices? ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [FSO] losetup trouble
Hello, On 04/10/2008, at 2:51 AM, rhn wrote: [EMAIL PROTECTED]:/media/card# touch /dev/loop0 [EMAIL PROTECTED]:/media/card# losetup /dev/loop0 bigfile losetup: /dev/loop0 [EMAIL PROTECTED]:/media/card# ls -l /dev/loop0 -rw-r--r--1 root root0 Oct 3 16:31 /dev/loop0 I'm surprised losetup didn't complain. There's not much point in making loop0 a regular file. I have not tried usb storage but: pico:~# ls -la /dev/loop0 brw--- 1 root root 7, 0 Oct 4 12:08 /dev/loop0 pico:~# dd if=/dev/zero of=foo bs=1k count=1k 1024+0 records in 1024+0 records out 1048576 bytes (1.0 MB) copied, 0.208113 s, 5.0 MB/s pico:~# mke2fs foo mke2fs 1.41.1 (01-Sep-2008) [...] pico:~# mkdir /mnt/tmp pico:~# mount -o loop foo /mnt/tmp/ pico:~# ls -la /mnt/tmp/ total 17 drwxr-xr-x 3 root root 1024 Oct 4 12:12 . drwxr-xr-x 5 root root 4096 Oct 4 12:12 .. drwx-- 2 root root 12288 Oct 4 12:12 lost+found pico:~# mount | grep foo /root/foo on /mnt/tmp type ext2 (rw,loop=/dev/loop0) I imagine normally /dev/loop* should be created by udev. The fact that it doesn't exist might indicate that you don't have loopback device support in your kernel. Check this: pico:~# grep loop /proc/devices 7 loop If it's not there try modprobe loop. If it is there, delete your bogus /dev/loop0 and recreate it like this: mknod /dev/loop0 b 7 0 Cheers, Alex ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
