With Anand's latest review of SSD's and Linus' endorsement of that review , it seemed like a good time to move my noisy hard drives to the basement and switch to an flash based hard drive (AKA solid state drive: SSD).
The 30GB Vertex SSD is currently CAD$ 160. Getting anything other than the smallest one seems very silly - I assume that prices are going to drop like a rock, so it'd be very painful to spend much more than that on anything that will be worthless in a year or two.
Luckily, Linux will fit very easily into 30GB. The plan is to put just about everything except for the operating system and work onto the NFS server in the basement.
The process did not go very smoothly at all. I highly recommend staying away from the Vertex drives for a few months to let them mature. But if you insist, here's the procedure I went through.
The first thing I had to do was upgrade my kernel to 2.6.29 . The SSD worked for a little while, and then failed completely. It appeared to work on an Intel based machine, but my AMD 780G machine was not happy at all. I even went through the hassle of installing Windows XP to see if it worked there, but XP didn't even see the drive. Note that my other machine appeared to work fine with the SSD, so I think it's sort of SB700/SSD interaction. Others have reported issues on the forum as well.
The first thing you'll probably want to do is a secure erase of the drive. SSD's slow down as they're used, so starting fresh is essential. Warning, this will completely erase any ATA drive, so make sure you have that drive letter right!
hdparm --security-erase NULL /dev/sda
fdisk -H 224 -S 56 /dev/sda # enter 'n, p, 1, 1, 5082' at the prompts to create a partition covering the entire drive # enter 'x, b, 1, 256, w' to move the start of the partition into alignment mke2fs -t ext4 -E stripe-width=32,resize=50G /dev/sda1 mkdir /mnt/ssd mount /dev/sda1 /mnt/ssd
Now follow these instructions to copy your operating system over to the new drive. We're going to copy over everything except for /home/blarsen, which we're going to mount over NFS.
ls / > ~/root_files vi ~/root_files # remove proc, sys, mnt, home et cetera tar --create --one-file-system --file - `cat ~/root_files` | (cd /mnt/ssd ; tar xvf -) mkdir /mnt/ssd/proc mkdir /mnt/ssd/sys mkdir /mnt/ssd/mnt mkdir -p /mnt/ssd/home/blarsen chown blarsen.blarsen /mnt/ssd/home/blarsen
Let's set up our fstab to nfs mount /home/blarsen, and run tmpfs on /tmp and /var/tmp. The size parameter to tmpfs is a maximum size -- it doesn't use any RAM if it isn't needed. The default is half your RAM, so you'll probably want to limit down a bit.
cat > /mnt/ssd/etc/fstab bulti:/home/blarsen /home/blarsen nfs rsize=8192,wsize=8192,timeo=14,intr,noatime,nodiratime 0 0 none /tmp tmpfs size=500M,mode=777,auto 0 0 none /var/tmp tmpfs size=500M,mode=777,auto 0 0 ^D
Change your root partition in fstab:
blkid # to determine the UUID vi /mnt/ssd/etc/fstab
Now, update the grub menu.lst. These instructions are missing from the tech republic link above. You want to look for the kopt= and groot= option lines. They look like comment lines, but they are actually instructions to update-grub. While you're at it, add "elevator=deadline" to your kopt.
vi /mnt/ssd/boot/grub/menu.lst # update kopt, groot UUID's. Also add elevator=deadline to kopt chroot /mnt/ssd update-grub exit
And install grub on the new drive:
grub-install --root-directory=/mnt/ssd /dev/sda
Let's save our SSD by logging to our NFS server. See these instructions from Sun .
cat >> /mnt/ssd/etc/hosts 192.168.1.91 bulti loghost ^D cat > /mnt/ssd/etc/syslog.conf *.*; @loghost *.err;*.emerg /var/log/messages
On your loghost, edit /etc/default/syslogd to add the "-r" option and restart sysklogd.
Switch your network interface away from network-manager so it comes up earlier in your boot cycle:
cat >> /mnt/ssd/etc/network/interfaces auto eth0 iface eth0 inet dhcp ^D
rsync your home directory to your NFS server.
rsync -av /home/blarsen/ bulti:/home/blarsen/ # those trailing slashes are important
Reboot and enjoy!