save.dat file and mloop problem. [Solved]

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save.dat file and mloop problem. [Solved]

Post#1 by Ed_P » 10 Jul 2016, 19:51

All my Porteus files and ISOs are on one partition. If I boot Porteus without the change= option and try to check the space usage of the save.dat file using mloop I get a duplicate UUID error.

Code: Select all

mloop /mnt/sda5/porteus3.0/changes/porteussave.dat
using /dev/loop28

Please wait while i gather some info ....

mount: wrong fs type, bad option, bad superblock on /dev/loop28,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so
.....

dmesg | tail
[   14.963717] fbcon: radeondrmfb (fb0) is primary device
[   15.546008] Console: switching to colour frame buffer device 170x48
[   15.559462] radeon 0000:00:01.0: fb0: radeondrmfb frame buffer device
[   15.559472] radeon 0000:00:01.0: registered panic notifier
[   15.561376] [drm] Initialized radeon 2.37.0 20080528 for 0000:00:01.0 on minor 0
[   18.383033] NET: Registered protocol family 10
[   18.999589] atl1c 0000:06:00.0: irq 42 for MSI/MSI-X
[   19.044958] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   66.559253] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
[  146.850445] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount

[./code]

mloop help doesn't show any option that could skip the error.

[code]mloop -help
 Please enter root's password below 
readlink: invalid option -- 'h'
Try 'readlink --help' for more information.
Password: 
using /dev/loop28

##########################
Usage of /opt/porteus-scripts/mloop:
##########################
 mloop /path/to/module.xzm 
 mloop /path/to/file.iso 
 mloop /path/to/file.dat 
 mloop /path/to/file.img 
 mloop /path/to/initrd.xz 
 mloop /path/to/file.tar 
 mloop /path/to/file.tar.gz 
 mloop /path/to/file.tar.bz2 
 mloop http://domain.com/file.iso 

File given will be mounted on a loop at /mnt/loop
You can use uloop to unmout loop.


Is there an easy way to mloop the file short of copying it to a USB drive?
Last edited by Ed_P on 11 Jul 2016, 02:45, edited 1 time in total.
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Re: save.dat file and mloop problem.

Post#2 by Bogomips » 10 Jul 2016, 20:08

What is the output of:

Code: Select all

file  /mnt/sda5/porteus3.0/changes/porteussave.dat
mkdir sd
sudo mount /mnt/sda5/porteus3.0/changes/porteussave.dat sd
Linux porteus 4.4.0-porteus #3 SMP PREEMPT Sat Jan 23 07:01:55 UTC 2016 i686 AMD Sempron(tm) 140 Processor AuthenticAMD GNU/Linux
NVIDIA Corporation C61 [GeForce 6150SE nForce 430] (rev a2) MemTotal: 901760 kB MemFree: 66752 kB

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Re: save.dat file and mloop problem.

Post#3 by Ed_P » 10 Jul 2016, 21:01

Bogomips wrote:What is the output of:

Code: Select all

file  /mnt/sda5/porteus3.0/changes/porteussave.dat
mkdir sd
sudo mount /mnt/sda5/porteus3.0/changes/porteussave.dat sd
:friends:

Code: Select all

guest@porteus:~$ file  /mnt/sda5/porteus3.0/changes/porteussave.dat
/mnt/sda5/porteus3.0/changes/porteussave.dat: SGI XFS filesystem data (blksz 4096, inosz 256, v2 dirs)
guest@porteus:~$ mkdir sd
guest@porteus:~$ sudo mount /mnt/sda5/porteus3.0/changes/porteussave.dat sd
Password:
mount: wrong fs type, bad option, bad superblock on /dev/loop28,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

guest@porteus:~$ dmesg | tail
[  363.964351] ums-realtek 2-2:1.0: USB Mass Storage device detected
[  364.012624] scsi1 : usb-storage 2-2:1.0
[  364.013387] usb 2-2: USB disconnect, device number 4
[  364.047064] psmouse serio1: elantech: retrying ps2 command 0xf8 (2).
[  364.749215] psmouse serio1: elantech: retrying ps2 command 0xf8 (1).
[  368.713748] atl1c 0000:06:00.0: irq 42 for MSI/MSI-X
[  368.741367] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[  470.736939] aufs may_rename_srcdir:469:URL Classifier[4950]: renaming dir who has child(ren) on multiple branches, is not supported
[ 5447.098602] aufs au_new_inode:432:ldconfig[7147]: Warning: Un-notified UDBA or repeatedly renamed dir, b19, squashfs, libcups.so.2, hi7243, i4195.
[ 5646.746214] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
guest@porteus:~$ 
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Re: save.dat file and mloop problem.

Post#4 by Bogomips » 10 Jul 2016, 21:17

Tried in AF mode?
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Re: save.dat file and mloop problem.

Post#5 by Ed_P » 10 Jul 2016, 21:33

Bogomips wrote:Tried in AF mode?
No but tried with no changes= operand.

Code: Select all

kernel /boot/syslinux/vmlinuz    from=/ISOs/%ISO30% extramod=/porteus3.0/Modules;/porteus3.0/modsavedat volume=33 reboot=cold
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Re: save.dat file and mloop problem.

Post#6 by Ed_P » 10 Jul 2016, 22:07

Interesting. With my "AF" menu I am able to access the save.dat file!! :shock:

Code: Select all

kernel /boot/syslinux/vmlinuz    from=/ISOs/%ISO30% extramod=/porteus3.0/modnetwork
I was suspecting the cause of the UUID problem was the location of the ISO file but apparently it's tied to one of my modules!! hmmmm

Thank you Bogomips :beer:

A second question. If I check a save.dat file and see it is getting full I would like to be able to delete a file, usually something in the Downloads folder, and update the save.dat file without rebooting the system. Is that too crazy to consider?

I have 3 systems on my harddrive and 1 on a USB drive. AF mode is limited, imo, and if I could check all the save.dat files at one time and update if necessary it would be convenient.
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Re: save.dat file and mloop problem.

Post#7 by Ed_P » 10 Jul 2016, 23:56

Ed_P wrote:I was suspecting the cause of the UUID problem was the location of the ISO file but apparently it's tied to one of my modules!! hmmmm
I found the module causing the problem.

Code: Select all

guest@porteus:~$ ls /mnt/sda5/porteus3.0/modsavedat
porteussave.dat.xzm*
guest@porteus:~$ 
:fool:

My "safe boot", for when the grandkids want to use the netbook, doesn't use the changes= option but does use the extramods= option which points to the backup of the save.dat file which is named as a mod file. This way no changes get made to the system when they use it but all the bookmarks and settings are there for them to use. And so to is it's UUID.

Thanks again Bogomips. :beer:
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Re: save.dat file and mloop problem.

Post#8 by Bogomips » 11 Jul 2016, 00:18

Ed_P wrote:I have 3 systems on my harddrive and 1 on a USB drive. AF mode is limited, imo, and if I could check all the save.dat files at one time and update if necessary it would be convenient.
Just hypothesising here, that the save.dat is a flattened fileystem. Therefore to make changes you have to transform it into a filesystem in a fake root, preferably on a real filesystem thereby avoiding whiteout files when deleting, After cleaning it up the fakeroot has to be flattened into a save.dat file, somewhat along the lines of xzm2dir, followed after amendments, by dir2xzm. :)
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Re: save.dat file and mloop problem.

Post#9 by Ed_P » 11 Jul 2016, 02:45

Wow. It took a time machine but I think I found the answer.

viewtopic.php?f=81&t=3501&p=25151#p25178

I haven't worried about these files in quite awhile.

Apparently whatever changes are made to a mlooped file are written to disk when the file is ulooped. Simple. :good:
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Re: save.dat file and mloop problem.

Post#10 by Ed_P » 11 Jul 2016, 12:28

Last question, I promise. Can you give me a clue as to why this code doesn't work?

Code: Select all

   UUIDck=`grep -A1 "duplicate UUID" /var/log/dmesg|tail `  
   echo UUIDck=$UUIDck
when dmesg | tail clearly shows:

Code: Select all

guest@porteus:~$ dmesg | tail
[   15.490453] Console: switching to colour frame buffer device 170x48
[   15.502196] radeon 0000:00:01.0: fb0: radeondrmfb frame buffer device
[   15.502200] radeon 0000:00:01.0: registered panic notifier
[   15.522454] [drm] Initialized radeon 2.37.0 20080528 for 0000:00:01.0 on minor 0
[   18.347441] NET: Registered protocol family 10
[   18.917994] atl1c 0000:06:00.0: irq 42 for MSI/MSI-X
[   19.069128] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[  272.086462] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
[  420.545306] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
[  475.177436] aufs may_rename_srcdir:469:URL Classifier[2822]: renaming dir who has child(ren) on multiple branches, is not supported
All I'm getting is:

Code: Select all

UUIDck=
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Re: save.dat file and mloop problem. [Solved]

Post#11 by Bogomips » 11 Jul 2016, 13:12

  • Code: Select all

    guest@porteus:~$ cat > t
    [   15.490453] Console: switching to colour frame buffer device 170x48
    [   15.502196] radeon 0000:00:01.0: fb0: radeondrmfb frame buffer device
    [   15.502200] radeon 0000:00:01.0: registered panic notifier
    [   15.522454] [drm] Initialized radeon 2.37.0 20080528 for 0000:00:01.0 on minor 0
    [   18.347441] NET: Registered protocol family 10
    [   18.917994] atl1c 0000:06:00.0: irq 42 for MSI/MSI-X
    [   19.069128] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
    [  272.086462] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
    [  420.545306] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
    [  475.177436] aufs may_rename_srcdir:469:URL Classifier[2822]: renaming dir who has child(ren) on multiple branches, is not supported
    
  • Code: Select all

    guest@porteus:~$ grep -A1 "duplicate UUID" t
    [  272.086462] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
    [  420.545306] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
    [  475.177436] aufs may_rename_srcdir:469:URL Classifier[2822]: renaming dir who has child(ren) on multiple branches, is not supported
  • Code: Select all

    guest@porteus:~$ grep -A1 "duplicate UUID" t | tail
    [  272.086462] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
    [  420.545306] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
    [  475.177436] aufs may_rename_srcdir:469:URL Classifier[2822]: renaming dir who has child(ren) on multiple branches, is not supported
    
  • Code: Select all

    guest@porteus:~$ u=$(grep -A1 "duplicate UUID" t | tail)
    guest@porteus:~$ echo $u
    [ 272.086462] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount [ 420.545306] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount [ 475.177436] aufs may_rename_srcdir:469:URL Classifier[2822]: renaming dir who has child(ren) on multiple branches, is not supported
    
:unknown:
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Re: save.dat file and mloop problem. [Solved]

Post#12 by Ed_P » 11 Jul 2016, 13:43

Bogomips wrote:

Code: Select all

guest@porteus:~$ cat > t
[   15.490453] Console: switching to colour frame buffer device 170x48
[   15.502196] radeon 0000:00:01.0: fb0: radeondrmfb frame buffer device
[   15.502200] radeon 0000:00:01.0: registered panic notifier
[   15.522454] [drm] Initialized radeon 2.37.0 20080528 for 0000:00:01.0 on minor 0
[   18.347441] NET: Registered protocol family 10
[   18.917994] atl1c 0000:06:00.0: irq 42 for MSI/MSI-X
[   19.069128] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[  272.086462] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
[  420.545306] XFS (loop28): Filesystem has duplicate UUID 97f3e427-7d04-4e91-af1e-770b4b99d3b8 - can't mount
[  475.177436] aufs may_rename_srcdir:469:URL Classifier[2822]: renaming dir who has child(ren) on multiple branches, is not supported
So you're indicating that I need to write the log to another file then do my processing on it. Ok, but why can't I access the dmesg file directly? :unknown: The script I'm using doing invoke root privileges.

Code: Select all

guest@porteus:~$ u=$(grep -A1 "duplicate UUID" t | tail)
guest@porteus:~$ echo $u
Actually I started with something similar to this.

BTW This is what I get:

Code: Select all

guest@porteus:~$ cat > t



But I'll keep playing around.

Thanks Bogomips. :)


-update-

The end results of my efforts, with your help:

Code: Select all

   dmesg | tail > t
   UUIDck=$(grep -A1 "duplicate UUID" t | tail)  
   if [ ! "$UUIDck" == "" ]; then
      echo
      echo " * This is NOT Always Fresh mode. * "
      echo 
   fi
   rm t  
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Re: save.dat file and mloop problem. [Solved]

Post#13 by Bogomips » 11 Jul 2016, 14:27

Ed_P wrote:So you're indicating that I need to write the log to another file then do my processing on it. Ok, but why can't I access the dmesg file directly?
No. All that was to indicate using your data, in order to prove the steps.

imo all that was needed:

Code: Select all

u=$(grep -A1 "duplicate UUID" /var/log/dmesg)
But the way it is now user friendlier:

Code: Select all

dmesg -H | tail > t
UUIDck=$(grep -A1 "duplicate UUID" t)
No need for another tail. :wink:
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Re: save.dat file and mloop problem. [Solved]

Post#14 by Ed_P » 11 Jul 2016, 15:12

Bogomips wrote:imo all that was needed:

Code: Select all

u=$(grep -A1 "duplicate UUID" /var/log/dmesg)
I'm pretty sure that's what I started with and it didn't work. But maybe with the tail option too.
But the way it is now user friendlier:

Code: Select all

dmesg -H | tail > t
UUIDck=$(grep -A1 "duplicate UUID" t)
No need for another tail. :wink:
Oh. Ok. :oops:

BTW For me I get this:

Code: Select all

guest@porteus:~$ dmesg -H | tail
dmesg: invalid option -- 'H'

Usage:
 dmesg [options]

Options:
 -C, --clear                 clear the kernel ring buffer
 -c, --read-clear            read and clear all messages
 -D, --console-off           disable printing messages to console
 -d, --show-delta            show time delta between printed messages
....
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Re: save.dat file and mloop problem. [Solved]

Post#15 by Bogomips » 11 Jul 2016, 15:55

  • Code: Select all

    guest@porteus:~$ dmesg -H | tail
    [  +0.000001] Buffer I/O error on dev loop8, logical block 3, async page read
    [  +2.403105] nouveau 0000:00:0d.0: bus: MMIO write of 024d0001 FAULT at 00b020
    [  +4.659566] nouveau 0000:00:0d.0: bus: MMIO write of 01fb0001 FAULT at 00b030
    [  +0.401214] nouveau 0000:00:0d.0: bus: MMIO write of 00000000 FAULT at 00b030
    [Jul11 12:49] EXT4-fs (sda9): error count since last fsck: 12
    [  +0.000012] EXT4-fs (sda9): initial error at time 1467742481: ext4_mb_generate_buddy:758
    [  +0.000003] EXT4-fs (sda9): last error at time 1468173860: ext4_mb_generate_buddy:758
    [Jul11 12:55] tun: Universal TUN/TAP device driver, 1.6
    [  +0.000005] tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>
    [Jul11 13:12] EXT4-fs error (device sda9): ext4_mb_generate_buddy:758: group 555, block bitmap and bg descriptor inconsistent: 17559 vs 17561 free clusters
    
  • Code: Select all

    guest@porteus:~$ dmesg -e | tail
    [  +0.000001] Buffer I/O error on dev loop8, logical block 3, async page read
    [  +2.403105] nouveau 0000:00:0d.0: bus: MMIO write of 024d0001 FAULT at 00b020
    [  +4.659566] nouveau 0000:00:0d.0: bus: MMIO write of 01fb0001 FAULT at 00b030
    [  +0.401214] nouveau 0000:00:0d.0: bus: MMIO write of 00000000 FAULT at 00b030
    [Jul11 12:49] EXT4-fs (sda9): error count since last fsck: 12
    [  +0.000012] EXT4-fs (sda9): initial error at time 1467742481: ext4_mb_generate_buddy:758
    [  +0.000003] EXT4-fs (sda9): last error at time 1468173860: ext4_mb_generate_buddy:758
    [Jul11 12:55] tun: Universal TUN/TAP device driver, 1.6
    [  +0.000005] tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>
    [Jul11 13:12] EXT4-fs error (device sda9): ext4_mb_generate_buddy:758: group 555, block bitmap and bg descriptor inconsistent: 17559 vs 17561 free clusters
    
  • Code: Select all

    guest@porteus:~$ which dmesg
    /bin/dmesg
    guest@porteus:~$ file /bin/dmesg 
    /bin/dmesg: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, stripped
    
Wonder if it's the same in 64 bit rc4. Will try later.
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