a.) 9 bad sectors reported by gnome-disks.
b.) Interested on new stuff - SSD
e.) Attractive price from Comex: Sandisk 120GB only S$72.
Did some research on the web.
A good article https://help.ubuntu.com/community/MovingLinuxPartition , but seems not update-to-date. Anyway it explains what is going on in details. I followed from step 1 to 4, and part of step 5 & 6 . Since I have no confidence on editing grub.cfg and didn't see below (maybe few detail steps is not descripted clearly)
1) UBUNTU...
- Finally, once rebooted successfully on new Ubuntu partition
Thus I abandom the "Refresh the GRUB 2 menu "
sudo update-grub
Instead , I followed below step to install grub mentioned in http://frugaltech.happystoic.com/ssdlinux and https://frankfzw.wordpress.com/2014/12/23/migrate-ubuntu-14-04-from-hdd-to-ssd/
$ sudo mount -o bind /dev /mnt/ssd/dev
$ sudo mount -o bind /sys /mnt/ssd/sys
$ sudo mount -t proc /proc /mnt/ssd/proc
#$ sudo cp /proc/mounts /media/SSD/etc/mtab --> I skip this command, as it doesn't seem to use UUID.
$ sudo chroot /mnt/ssd
$ grub-install /dev/sdc
$ grub-install --recheck /dev/sdc # only in case of errors in the step before
$ update-grub2
Reboot PC and Yes!18 seconds instead of previous 45 seconds.
Later on I study somemore on mtab and fstab.
Here is one short comparison : http://www.linuxquestions.org/questions/linux-newbie-8/difference-between-mtab-and-fstab-924190/
and more can be found http://ubuntuforums.org/showthread.php?t=1737715
For UUID to be used in fstab, in fact I prefer to use device ID & partition ID, as I have 2 HDDs (1TB Hitachi and 2TB Toshiba) and 1 SDD (120GB Sandisk). Here is my fstab, easier for me to understand.
root@hmc-P55A-UD3:/etc# cat fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
#
# / was on /dev/sda10 during installation
# /mnt/shared was on /dev/sda8 during installation
# /mnt/staging was on /dev/sda9 during installation
# /mnt/vm was on /dev/sda7 during installation
# swap was on /dev/sda5 during installation
/dev/disk/by-id/ata-Hitachi_HDT721010SLA360_STF610MR15HK9P-part7 /mnt/vm ext3 defaults 0 2
/dev/disk/by-id/ata-Hitachi_HDT721010SLA360_STF610MR15HK9P-part8 /mnt/shared ext3 defaults 0 2
/dev/disk/by-id/ata-Hitachi_HDT721010SLA360_STF610MR15HK9P-part9 /mnt/staging ext3 defaults 0 2
#/dev/disk/by-id/ata-Hitachi_HDT721010SLA360_STF610MR15HK9P-part10 / ext4 errors=remount-ro 0 1
/dev/disk/by-id/ata-SanDisk_SDSSDA120G_152480401043-part1 / ext4 noatime,nodiratime,errors=remount-ro 0 1
/dev/disk/by-id/ata-Hitachi_HDT721010SLA360_STF610MR15HK9P-part5 none swap sw 0 0
#/dev/disk/by-id/ata-Hitachi_HDT721010SLA360_STF610MR15HK9P-part2 none swap sw 0 0
/dev/disk/by-id/ata-TOSHIBA_DT01ACA200_43J1EREGS-part1 /mnt/localubt ext4 defaults 0 2
/dev/disk/by-id/ata-TOSHIBA_DT01ACA200_43J1EREGS-part2 /mnt/shared2 ext4 defaults 0 2
gnome-disks a handy tool to manipulative this.
I also referenced https://radu.cotescu.com/migrating-your-ubuntu-machine-to-a-ssd-drive/
Prepared a few rescue Swiss knives like boot-repair, gparted, unetbootin, clonezilla, Ubuntu live CD (same version as my HDD) in bootable thumdrives.
