I bought a crucial M4 (128GB) for my laptop, and now the idea is to move the operating system and most of the data there, keeping the other disk in the cd-bay as second disk. I formatted the SSD disk like this: Disk /dev/sda: 128.0 GB, 128035676160 bytes, 250069680 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000ee70d Device Boot Start End Blocks Id System /dev/sda1 * 2048 411647 204800 83 Linux /dev/sda2 411648 250069679 124829016 83 Linux Where sda2 is a LVM volume, but the first thing which I'm not sure is if I got the alignment correct. I didn't find anywhere what should be the alignment for my disk, and a way to check that you actually got it right (some ways only for Windows funnily). Any hint? The second thing is that at the moment I should be able to boot both disks, but the SSD now fails to load, and I'm a bit lost in the new GRUB2 configuration: MENUENTRY 'Arch GNU/Linux, with Linux core repo kernel' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-core repo kernel-true-ad4103fa-d940-47ca-8506-301d8071d467' { load_video set gfxpayload=keep insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos5' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 ad4103fa-d940-47ca-8506-301d8071d467 else search --no-floppy --fs-uuid --set=root ad4103fa-d940-47ca-8506-301d8071d467 fi echo 'Loading Linux core repo kernel ...' linux /boot/vmlinuz-linux root=UUID=ad4103fa-d940-47ca-8506-301d8071d467 ro quiet echo 'Loading initial ramdisk ...' initrd /boot/initramfs-linux.img } All I need to do is boot from disk (hd0, 0) and then the / is on LVM /dev/ssd/root. I'm not sure, however, if this configuration is supposed to make sense or it's just autogenerated as a template.. The fstab for the SSD is this: /dev/mapper/ssd-root / ext4 rw,relatime,data=ordered,discard 0 2 # UUID=54d06c44-2b32-4969-be42-d98d2bf7e994 /dev/sda1 /boot ext4 rw,relatime,data=ordered,discard 0 2 but I've seen somewhere that ext4 might be a problem too, or is that fixed? Thanks a lot, Andrea