First of all I am using Raspberry Pi 4 Model B with Raspberry Pi OS.
I've made an image of Raspbian with some functionalities, later I've cloned it using Win32DiskImager and finally I compressed this image using this script: https://raw.githubusercontent.com/Drewsif/PiShrink/master/pishrink.sh.
The last step I did was flashing the compressed .img to the SD using BalenaEtcher.
Before cloning and compressing the image I put it in read-only mode.
I have realized that the image with the read-only ON and being compressed => does NOT work.
But if read-only mode is OFF and I compress the image => IT WORKS FINE.
When introducing the SD that has the read-only mode ON, it stays in the boot screen and prints this:
I think that compressing the image with PishRink script removes something that it don't have to remove...
Has it happened to someone or have someone suffered the same error that I have shown in the previous image? Any idea what it can be?
The problem was the PishRink script that was removing something that it doesn't have to remove...
I used a new script:
*** THIS SCRIPT ONLY WORKS ON RASPBIAN IMAGES. ***
To use this script, copy the code to a file called 'resizeimage.pl'.
#!/usr/bin/perl
use utf8;
use 5.010;
use strict;
#use autodie;
use warnings;
#use diagnostics;
my $who = `whoami`;
if ($who !~ /root/)
{
print "This should be run as root or with the sudo command.\n";
exit 1;
}
if (!$ARGV[0])
{
print "No image file given.\n";
exit 1;
}
my $image = $ARGV[0];
if ($image !~ /^\//)
{
print "Please enter full path to image file.\n";
exit 1;
}
if (! -e $image)
{
print "$image does not exist.\n";
exit 1;
}
my @name = split (/\//, $image);
print "\n$name[(scalar @name) - 1]:\n";
print "=" x (length ($name[(scalar @name) - 1]) + 1) . "\n";
my $info = `parted -m $image unit B print | grep ext4`;
(my $num, my $start, my $old, my $dummy) = split (':', $info, 4);
chop $start;
chop $old;
printf "Old size - %d MB (%1.2f GB)\n", int ($old / 1048576), ($old / 1073741824);
my $loopback = `losetup -f --show -o $start $image`;
chop $loopback;
`e2fsck -p -f $loopback`;
if ($? != 0)
{
print "There was an error in the file system that can't be automatically fixed... aborting.\n";
`losetup -d $loopback`;
exit 1;
}
$info = `resize2fs -P $loopback 2>&1`;
($dummy, my $size) = split (': ', $info, 2);
chop $size;
$size = $size + 1024;
`sudo resize2fs -p $loopback $size 2>&1`;
sleep 1;
`losetup -d $loopback`;
$size = ($size * 4096) + $start;
`parted $image rm $num`;
`parted -s $image unit B mkpart primary $start $size`;
$size = $size + 58720257;
printf "New size - %d MB (%1.2f GB)\n", int ($size / 1048576), ($size / 1073741824);
`truncate -s $size $image`;
my $diff = $old - $size;
printf "Image file was reduced by %d MB (%1.2f GB)\n", int ($diff / 1048576), ($diff / 1073741824);
exit 0;
Finally go to the console and:
sudo perl ./resizeimage.pl /path_to_your_image