Creating a large partition and booting off it
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Copy the device tree (Sure this is too much, but not copying it will not work) | Copy the device tree (Sure this is too much, but not copying it will not work) | ||
cp -af /dev/* <mountpoint>/dev | cp -af /dev/* <mountpoint>/dev | ||
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| + | On the new partition, edit the file etc/event.d/rcS-late. Right after | ||
| + | rm -f $fstab_tmp insert the following lines, which you may want to adapt to your needs: | ||
| + | cat << EOF > $fstab | ||
| + | # marcus-generated 20:11 | ||
| + | #rootfs / rootfs defaults,errors=remount-ro,noatime 0 0 | ||
| + | /dev/mmcblk0p4 / ext3 rw,defaults,errors=remount-ro,noatime 0 0 | ||
| + | /dev/mmcblk0p1 /home/user/MyDocs vfat noauto,nodev,noexec,nosuid,noatime,nodiratime,utf8,uid=29999,shortname=mixed,dm ask=000,fmask=0133,rodir 0 0 | ||
| + | /dev/mmcblk0p2 /home ext3 rw,noatime,errors=continue,commit=1,data=writeback 0 0 | ||
| + | /dev/mmcblk0p3 none swap sw 0 0 | ||
| + | EOF | ||
| + | |||
Using bootmenu.sh and this entry in /etc/bootmenu.d I can now boot into my new 3.7GB root drive | Using bootmenu.sh and this entry in /etc/bootmenu.d I can now boot into my new 3.7GB root drive | ||
Revision as of 14:34, 26 April 2010
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Some instructions here may cause serious problems. When unsure, see General precautions Backing up your data is recommended. In case of trouble you might need to re-flash your device. |
I found it is possible to add a partition to the internal flash card.
Contents |
WARNING: Using this recipe you will lose MyDocs.
Make a backup of MyDocs!
Creation of the new partition
umount /home/user/MyDocs
/home cannot be umounted, unfortunately. But this didn't do any harm to /home
Use parted to shrink the MyDocs partition (on my N900 it was the 1st one)
parted /dev/mmcblk0 print parted /dev/mmcblk0 1 resize 1kb 25GB
reboot
Use fdisk to
- remove the first partition (Because parted makes it not end on a cylinder boundary)
- recreate the exactly same partition again (this time ending on a cylinder boundary) Make sure to specify "TYPE C" for vfat
- add the 4th partition right after the 1st one
reboot
Enjoy the new partition.
The result might look similar to this one
Disk /dev/mmcblk0: 32.0 GB, 32015122432 bytes
4 heads, 16 sectors/track, 977024 cylinders
Units = cylinders of 64 * 512 = 32768 bytes
Disk identifier: 0x000c260e
Device Boot Start End Blocks Id System
/dev/mmcblk0p1 1 762940 24414072 c W95 F AT32 (LBA)
/dev/mmcblk0p2 884866 950401 2097152 83 Linux
/dev/mmcblk0p3 950402 974977 786432 82 Linux swap / Solaris
/dev/mmcblk0p4 762941 884865 3901600 83 Linux
Using the new partition
Using bootmenu.sh you can in fact boot from that partition. (I got bootmenu.sh via svn from https://garage.maemo.org/plugins/scmsvn/viewcvs.php?view=rev&root=bootmenu&revision=53 using trunk/install_bootmenu)
Copy the stuff of your root dist to the new one
rsync -rlutopgxv / <mountpoint of new partition>
Copy the device tree (Sure this is too much, but not copying it will not work)
cp -af /dev/* <mountpoint>/dev
On the new partition, edit the file etc/event.d/rcS-late. Right after rm -f $fstab_tmp insert the following lines, which you may want to adapt to your needs:
cat << EOF > $fstab # marcus-generated 20:11 #rootfs / rootfs defaults,errors=remount-ro,noatime 0 0 /dev/mmcblk0p4 / ext3 rw,defaults,errors=remount-ro,noatime 0 0 /dev/mmcblk0p1 /home/user/MyDocs vfat noauto,nodev,noexec,nosuid,noatime,nodiratime,utf8,uid=29999,shortname=mixed,dm ask=000,fmask=0133,rodir 0 0 /dev/mmcblk0p2 /home ext3 rw,noatime,errors=continue,commit=1,data=writeback 0 0 /dev/mmcblk0p3 none swap sw 0 0 EOF
Using bootmenu.sh and this entry in /etc/bootmenu.d I can now boot into my new 3.7GB root drive
ITEM_NAME="Internal part 4" ITEM_ID="mmc4" ITEM_DEVICE="mmcblk0p4" ITEM_MODULES="mbcache jbd ext2" ITEM_FSTYPE="ext2" ITEM_FSOPTIONS="noatime" ITEM_LINUXRC="" ITEM_FBMODE=""
Result
[root@phon:~/bootmenu]$ df -h Filesystem Size Used Avail Use% Mounted on rootfs 3,7G 524M 3,0G 15% / ubi0:rootfs 228M 192M 33M 86% /mnt/initfs /dev/mmcblk0p4 3,7G 524M 3,0G 15% / tmpfs 1,0M 60K 964K 6% /tmp tmpfs 256K 84K 172K 33% /var/run none 10M 76K 10M 1% /dev tmpfs 64M 4,0K 64M 1% /dev/shm /dev/mmcblk0p2 2,0G 129M 1,8G 7% /home /dev/mmcblk0p1 24G 7,9G 16G 34% /home/user/MyDocs