[Ubuntu PA] Disk Imaging Solutions

[Kevin Valentine]

Yep, tried exactly that start/stop setup before.  Just tested it again
for good measure :)  I still get messages like this in fdisk:
Partition 1 has different physical/logical endings
Partition 1 does not end on cylinder boundary

For now, I will just disregard them.  I'm able to mount the drive and
read/write without issues.  They don't appear to be errors, just
warnings.  My main reason for concern was that I don't see the same
behavior after doing the same partition layout in gparted.  Doesn't make
much sense.  Oh well, time to move forward.

btw, I vaguely recall seeing similar output in fdisk when looking at a
disk's partitions after I installed Puppy to it.  Puppy does it's own
partitioning depending upon the setup you choose.

-kevin

Brian Stempin wrote:
> Kevin,
> All of my partitions came out fine.  There were 2 things I did
> differently than you:
>
> 1.  I did not use dd to delete the first 512 bytes of the disk.  I
> believe that parted re-writes this part of the disk once you use the
> mklabel command, so I thought it was kind of pointless to run the
> extra command.
>
> 2.  My start value for a partition was the stop value for the last
> partition. 
> Example:
> parted --script /dev/sdb mklabel msdos
> parted --script /dev/sdb mkpartfs primary linux-swap 0 64MB
> parted --script /dev/sdb mkpartfs primary ext2 64MB 124MB
> parted --script /dev/sdb mkpartfs primary ext2 124MB 80GB
>
> assuming an 80GB hard drive.
>
>
> On Jan 27, 2008 9:34 PM, Kevin Valentine <kevin.valentine at gmail.com
> <mailto:kevin.valentine at gmail.com>> wrote:
>
>     Brian Stempin wrote:
>     > Just a bit of an update:
>     >
>     > 1.  I was able to repartition a USB disk without having to power
>     cycle
>     > or eject/inject using parted.
>     > 2.  I was able script the creation of partitions.
>     >
>     > A little more on Item 2:
>     > I'm currently writing a full-fledged script to handle partitioning.
>     > I'm currently working on the error handling and input sanitation.
>     > There is, however, one thing that I have yet to figure out.  When
>     > parted creates a partition, it requires a begin and end point.
>      I have
>     > yet to find a way to tell it to just use the rest of the remaining
>     > space.  I have an idea of how to solve this, but it's going to
>     require
>     > some leg-work on my part.
>     Yes, this is exactly what I've been experiencing.  I also checked
>     on the
>     power cycling.  Definitely not necessary with parted.  After you
>     create
>     your first two partitions, have you taken a look at them with fdisk?
>     The first partition always comes out fine, it's the rest of them that
>     get mangled.  If all three of your partitions look good in fdisk,
>     let me
>     know what you are using for start and stop values.  I've been through
>     the official parted manual so  many times now.  I think what we
>     need to
>     do is specify sectors instead of disk size.  This will most likely
>     need
>     some kind of calculation.
>
>     It seems like this should be such a simple task but it's getting
>     messier
>     by the day.  I'm glad you're working on this too.  I'll also let you
>     know if I find any info on the start and stop parameters.
>
>     -kevin
>
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