Question/Problem creating a live USB

Sat Jan 1 18:27:14 UTC 2011

On 01/01/2011 12:49 AM, Zoltan Hoppar wrote:
> I meant to delete completely your drive again - and use plain FAT32 to
> hold the maximum compatibility. If you use ext systems, use just plain
> ext2 because journaling systems like ext3 and 4 can be a problem
> (journaling rewrites to often the storage - and that shortens the
> drive life). If the formatting fails (like you had just quick
> formatted- that wipes only the data space, or it's just incomplete -
> this is what I think that's happened) - it marks linux thats an unkown
> FS, and windows couldn't handle this, or makes it broken. On third:
> Don't forget, that flash drives has cache on most systems - so it's a
> bit slower in writing out the data, and if you pull out earlier that
> finishes the formatting or the writing - could be have bad data chunks
> - what could result the same as I told you earlier. HTH.
>
> Cheers,
>
> Z
>
> 2011/1/1 JD<jd1008 at gmail.com>:
>> On 12/31/2010 10:45 PM, Zoltan Hoppar wrote:
>>> Hi,
>>>
>>> You have to wipe it the complete USB key again. When the process has
>>> fails, and finds some fragments - this is the result. Sometimes
>>> happens.
>>>
>>> Cheers,
>>>
>>> Z
>>> 2011/1/1 JD<jd1008 at gmail.com>:
>>>> Using liveusbcreator to dump a linux (not of any distro) iso image onto
>>>> a 256GiB flash drive (Made by Kensignton).
>>>>
>>>> After selecting the linux ISO image, and setting the
>>>> value of the persistent storage, I click Create Live USB.
>>>> I get this error message:
>>>>
>>>> Unknown filesystem. Your device may need to be reformatted.
>>>>
>>>>
>>>> The usb flash drive has partition 1 as a fat32 filesystem. It was
>>>> rejected by liveusbcreator with same error message as above.
>>>>
>>>> So, I formatted it as a Ext3 filesystem. Got the same error message.
>>>>
>>>>
>>>> Next I tried
>>>> /usr/bin/livecd-iso-to-disk cd100627.iso /dev/sdc
>>>>
>>>> Verifying image...
>>>> /sdb4/Download/OfflineNTpassword/BootCD/cd100627.iso: Could not get pvd data
>>>> Unable to read the disc checksum from the primary volume descriptor.
>>>> This probably means the disc was created without adding the checksum.Are
>>>> you SURE you want to continue?
>>>> Press Enter to continue or ctrl-c to abort
>>>> I press enter, and it exits without creating the bootable usb.
>>>>
>>>> So, I tried to use windows and follow the iso creator's instructions to
>>>> transfer the iso to flash disk. My winxp-sp3 does not recognize the
>>>> drive. And when I try to format the drive,  windows says it was not
>>>> able to format the drive.
>>>>
>>>> It is indeed strange that I can format it under Linux, and mount it
>>>> and use it the ordinary way. But I cannot transfer the iso image to it.
>>>>
>>>> Any ideas what to do next?
>>>>
>>>> Thanx for your help.
>>>>
>>>>
>>>> --
>>>> users mailing list
>>>> users at lists.fedoraproject.org
>>>> To unsubscribe or change subscription options:
>>>> https://admin.fedoraproject.org/mailman/listinfo/users
>>>> Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
>>>>
>> I assume that by "wipe it" you mean that
>> I should run the /usr/bin/wipe utility on it?
>> I thought mkfs cleans it up sufficiently so that
>> it is recognized as fat partition or an ext2 partition.
>> Nevertheless, I will try your suggestion.
>>
>> Cheers,
>>
>> JD
>> --
>> users mailing list
>> users at lists.fedoraproject.org
>> To unsubscribe or change subscription options:
>> https://admin.fedoraproject.org/mailman/listinfo/users
>> Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
>>
>
>
Well, I retried (after deleting all files and dirs.
I did not format it in a separate step this time.
I executed:

/usr/bin/livecd-iso-to-disk --format cd100627.iso /dev/sdc
Verifying image...
/sda1/Tmp/cd100627.iso: Could not get pvd data
Unable to read the disc checksum from the primary volume descriptor.
This probably means the disc was created without adding the checksum.Are 
you SURE you want to continue?
Press Enter to continue or ctrl-c to abort

WARNING: THIS WILL DESTROY ANY DATA ON /dev/sdc!!!
Press Enter to continue or ctrl-c to abort

Warning: The resulting partition is not properly aligned for best 
performance.
Waiting for devices to settle...
mke2fs 1.41.10 (10-Feb-2009)
Filesystem label=LIVE
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
16777216 inodes, 67108855 blocks
3355442 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
2048 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
     32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 
2654208,
     4096000, 7962624, 11239424, 20480000, 23887872

Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 35 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.
mount: wrong fs type, bad option, bad superblock on /dev/sdc1,
        missing codepage or helper program, or other error
        In some cases useful info is found in syslog - try
        dmesg | tail  or so

Cleaning up to exit...
umount: /media/usbdev.CtobRa: not mounted

There you have it! It gets formatted apparently to Ext2, but
after format it is not mountable.