Re: About RockRidge

[Michael Loftis <mloftis@modwest.com>]

--On January 31, 2006 12:40:14 PM +0800 Stephen Liu <satimis@yahoo.com> 
wrote:

> Hi Michelle,
>
> Tks for your advice.
>
> >   1)  dd if=/dev/zero of=new_cd_image.raw bs=1M count=650
> >   2)  mkfs.ext2 -b 1024 -m 0 new_cd_image.raw
> >   3)  mount new_cd_image.raw /mnt -o loop
> >
> >   4)  Copy your stuff onto it
> >
> >   5)  Burn the RAW image onto CD
>
> I tried the steps but did succeed.  I made the test on a FC3 PC on
> another location as I did not have a Knoppix LiveCD 4.0.2 in hand.
>
> Steps performed as follows;
> # dd if=/dev/zero of=new_cd_image.raw bs=1M count=650
> 650+0 records in
> 650+0 records out
> # mkfs -t ext3 -b 1024 -m 0 new_cd_image.raw
> mke2fs 1.38 (30-Jun-2005)
> new_cd_image.raw is not a block special device.
> Proceed anyway? (y,n) y
> Filesystem label=
> OS type: Linux
> Block size=1024 (log=0)
> Fragment size=1024 (log=0)
> 83312 inodes, 665600 blocks
> 0 blocks (0.00%) reserved for the super user
> First data block=1
> Maximum filesystem blocks=67895296
> 82 block groups
> 8192 blocks per group, 8192 fragments per group
> 1016 inodes per group
> Superblock backups stored on blocks:
>         8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409,
> 663553
>
> Writing inode tables: done
> Creating journal (16384 blocks): done
> Writing superblocks and filesystem accounting information: done
>
> This filesystem will be automatically checked every 34 mounts or
> 180 days, whichever comes first.  Use tune2fs -c or -i to override.
>
> (Remark: the files to be copied on a partition of fs ext3
>
> also tested "mkfs.ext2 -b 1024 -m 0 new_cd_image.raw"
> with the same result, not successful)
>
> # cp /home/satimis/Documents/FedoraCore3/ /mnt/
> cp: omitting directory `/home/satimis/Documents/FedoraCore3/'
>
> # du -h new_cd_image.raw
> 651M    new_cd_image.raw
>
> # ls -al /mnt/
> total 21
> drwxr-xr-x   3 root root  1024 Jan 31 10:54 .
> drwxr-xr-x  25 root root  4096 Jan 31 09:25 ..
> drwx------   2 root root 12288 Jan 31 10:54 lost+found
>
> To my surprize, there was nothing inside

Because you didn't copy anything onto it, see above, cp failed.
> # ls /mnt/new_cd_image.raw
> ls: /mnt/new_cd_image.raw: No such file or directory
>
>
> # umount /mnt/
> # du -h new_cd_image.raw
> 651M    new_cd_image.raw
> (Remark:  Also tested without "umount /mnt".  Same result,
> unsuccessful)
>
>
> Continued burning CD

Why?  your cp failed.  you've just a 650MB file of zeroes.

> # cdrecord dev=ATA:1,0,0 speed=10 -v -eject new_cd_image.raw
> ......
> Average write speed   9.9x.
> Min drive buffer fill was 98%
> Fixating...
> Fixating time:   26.990s
> cdrecord: fifo had 10736 puts and 10736 gets.
> cdrecord: fifo was 0 times empty and 10467 times full, min fill was
> 89%.
>
> # mount /dev/hdc /mnt/cdwriter
> mount: block device /dev/hdc is write-protected, mounting read-only
> mount: wrong fs type, bad option, bad superblock on /dev/hdc,
> or too many mounted file systems
> Please check that the disk is entered correctly.

/dev/hdc is going to default to iso9660, and /mnt/cdrwriter also has to 
exist....so assuming it does

mount -t ext2 /dev/hdc /mnt/cdwriter