Re: [leaf-user] lrcfg Install to Disk partition sizes

[Erich T. <eri...@th...>]

Hi Marko

Am 27.08.2025 um 06:06 schrieb marko via leaf-user:
> Hi all,
> 
> does anyone know where the default sizes of the partitons are set for the
> install to disk option?
> 
> Current sizes are a fraction too small to for my liking.
> Ideally I'd like partiton 2 to be 295MB and Part 3 to be 300MB.   Having the
> slightly different sizes makes them much easier to identify on disk.

Mhhh.... being the culprit and having it written quite a few years ago I 
had to reread my code and try to understand what it does.

look into /sbin/hdsupp_functions there is quite some code that 
calculates possible disk partition sizes, I have no hardware with me 
that I could use it on so cannot verify. The stuff you want is

################################################################################
# By default we build a disk layout with one bootloader partition
# and one LEAF partition

LAYOUT_TYPE=2 ;                 # default to a 2 partition layout
BOOT_PART_OFFSET=2048 ;         # standard offset for partition 1 in 512 
byte blocks
BOOT_PART_SIZE=2048 ;           # size of the boot partition in 512 byte 
blocks

PART_MAX=400000 ;               # maximum partition size in 512 byte blocks

NEED_FORMAT=YES ;
CONSOLE=serial ;

 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
AND
 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

build_disk_part_table() {
         local layout=$(mktemp)
         local hd_raw_size=$(get_device_blocks $HD_RAW_SELECTED)
         build_part_prefix ;

         local partition_space=$(( ($hd_raw_size - $BOOT_PART_OFFSET - 
$BOOT_PART_SIZE) / 2 ))
         [ $partition_space -gt $PART_MAX ] && partition_space=$PART_MAX

         PART2_OFFSET=$(( $BOOT_PART_OFFSET + $BOOT_PART_SIZE )) ;
         PART3_OFFSET=$(( $PART2_OFFSET + partition_space )) ;

         # install a single partition for ARM based architecture
         #
         check_for_arm_architecture && \
                 cp /usr/share/single_part.tmpl $layout || \
                 cp /usr/share/disk.tmpl $layout;

         [ $LAYOUT_TYPE -eq 2 ] && sed -i '$d' $layout;
         sed -i  "s!_DEVICE_!$HD_RAW_SELECTED!; \
                 s/_PART_/$PART_PREFIX/; \
                 s/_SIZE_P1_/$BOOT_PART_SIZE/; \
                 s/_OFFSET_P2_/$PART2_OFFSET/; \
                 s/_SIZE_P2_/$partition_space/; \
                 s/_OFFSET_P3_/$PART3_OFFSET/; \
                 s/_SIZE_P3_/$partition_space/" \
                 $layout;

         /sbin/fdisk /dev/$HD_RAW_SELECTED 1>/dev/null 2>&1 << EOF
         I
         $layout
         w
EOF
         rm -f $layout ;
         collect_partition_data ;
         NEED_FORMAT=YES ;
}


> 
> I currently make a new stick with the install script, manually move and resize
> and then re-install with the install script.

I am not sure if you cannot change partition sizes by rejecting the 
suggested values. Integrating it into leafinstall if needed does not 
seem too complicated. You will have to pass some parameters to the 
supporting functions.

I believe if you have a reasonable partitioned disk you can use this layout.

After all this fundction was meant for the NOOB user which would not 
care about any layout :-(

cheera

ET

-- 
„Wer von seinem Tag nicht zwei Drittel für sich hat, ist ein Sklave.“
―Friedrich Nietzsche