Creating a large partition and booting off it
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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.
== WARNING: Using this recipe you can lose MyDocs. == \ However, the most recent user reported happily not to loose it. Make a backup of MyDocs!
[edit] 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 (parted) print (parted) resize XXXXXX 25GB
Replace XXXXXX with the value given by parted print
reboot
Use fdisk to 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
[edit] 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 > $fstab # marcus-generated 20:11 #rootfs / rootfs defaults,errors=remount-ro,noatime 0 0 /dev/mmcblk0p4 / ext3 rw,defaults,errors=remount-ro,noatime 0 0 /dev/mmcblk0p1 /home/user/MyDocs vfat noauto,nodev,noexec,nosuid,noatime,nodiratime,utf8,uid=29999,shortname=mixed,dm ask=000,fmask=0133,rodir 0 0 /dev/mmcblk0p2 /home ext3 rw,noatime,errors=continue,commit=1,data=writeback 0 0 /dev/mmcblk0p3 none swap sw 0 0 EOF
Using bootmenu.sh and this entry in /etc/bootmenu.d I can now boot into my new 3.7GB root drive
ITEM_NAME="Internal part 4" ITEM_ID="mmc4" ITEM_DEVICE="mmcblk0p4" ITEM_MODULES="mbcache jbd ext2" ITEM_FSTYPE="ext2" ITEM_FSOPTIONS="noatime" ITEM_LINUXRC="" ITEM_FBMODE=""
[edit] Result
[root@phon:~/bootmenu]$ 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
- This page was last modified on 28 May 2010, at 13:34.
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