GRUB doesn't load from SSD

Hey,
I wanted to replace my HDD with an SSD. This is what I did:
1. boot into live disk, create partitions on my SSD: #1: /, btrfs, boot flag, #2: /, btrfs on LUKS [edit: I used fdisk, bad idea?]
2. mounted both partitions with compress=lzo, copied backup to the new disk.
3. chrooted into #1 (with proc, sys, /dev mounted properly)
4. installed grub2 (grub-install /dev/sdb)
5. changed /etc/default/grub and removed HDD-specific flags (I had a swapfile on my old drive)
5. created grub config (grub-mkconfig -o /boot/grub/grub.cfg)
6. changed /etc/fstab and /etc/crypttab accordingly.
Then I wanted to reboot, but my laptop wouldn't turn off and the LED for disk activity was flashing all the time...
Eventually (after ~20min) I pressed the power button and it simply turned off.
Now, when I boot, BIOS takes about 15 s to load (before ~2s) while disk activity is high again (I have no idea what it is doing). If I try to boot from the SSD, the BIOS screen doesn't go away at all, if I leave the live system stick plugged in, I can boot into the live system.
Two other things, which puzzled me:
1. The SSD sometimes shows up correctly as "Samsung 840 Base" in BIOS, but sometimes the name is completely scrambled.
2. If I check the MBR, I can see GRUB2 on it. If I reboot a couple times, the MBR eventually gets erased (0xFFFFF.. written on it). I have NO clue why.
Also, if I boot the live system, sometimes I get a lot of errors (something about ata1, the ssd).
I also read about troubles with Samsung laptops (I got the Samsung 300V3A-S02DE) and SSDs, causing the laptop not to boot at all anymore, but that isn't my problem.
I activated AHCI, might that cause the problem? (I don't even know what the difference is).
One more thing: Is compression on /boot even possible? I read somewhere that it can only boot from uncompressed /boot, but since grub isn't even loading, I don't think this is the issue either.
The basic question is: Is the disk simply broken or is this a misconfiguration?
Thanks for any help!
Last edited by morxa (2013-01-31 11:48:18)

swordfish wrote:- if you are able to start a live system (let's say a usb stick with an Ubuntu) you could check the SSD with the disks utility. Check before, if you have to enable S.M.A.R.T in your BIOS.
Thanks for the hint! I checked the SMART values and got an UDMA CRC Error Count of 432. Apparently, this is a sign of cable issues so I put in my old drive and checked again, it has an UDMA CRC Error Count of 0. I'm not sure if this means the SSD is broken or not.
I also tested the speed of my old drive with hdparm:
cached reads: ~3000MB/s
buffered disk reads: ~83MB/s
This is seems normal to me, so I guess the cable works properly after all.
Also, the Ubuntu Disks utility couldn't find any partitions on the SSD, which is odd. I was able to mount them, read from them and write to them using an Arch Linux Live disk. Why can't Gnome Disks find the partitions?

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Last edited by PhotonX (2012-07-26 06:04:53)

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Last edited by PhotonX (2012-05-18 21:54:56)

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I hope this helps you to understand more.
Thank you for trying to help me.
Tony

GRUB doesn't load from SSD

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