SearchCheck if aligned at http://www.techpowerup.com/articles/other/157
Theodore Ts'o's blog post is somewhat misleading, as even that manufacturer's MLC SSDs have an erase block size of 512KiB (PDF), like OCZ's drives - not 128KiB. You're better off running fdisk -H 32 -S 32 /dev/sda, which will align partitions to 512KiB, and mke2fs -b 4096 -E stride=128,stripe-width=128 -t ext4 (128 * 4096B = 512KiB).
for partitioning see http://www.ocztechnologyforum.com/forum ... sing-fdisk
But without ATA TRIM your drive writes will decrease (depending on write usage)
The only solution seams to secure erase the whole drive and do a reinstall
* add "elevator=noop" to /boot/grub/menu.lst
Some tips i found but think this came from a myth:
* use a tempdir for logs
/etc/fstab
tmpfs /var/log tmpfs defaults,noatime,mode=0755 0 0
tmpfs /tmp tmpfs defaults,noatime,mode=1777 0 0
tmpfs /var/tmp tmpfs defaults,noatime,mode=1777 0 0
/etc/rc.local
for dir in apparmor apt ConsoleKit cups dist-upgrade fsck installer news samba unattended-upgrades; do
mkdir -p /var/log/$dir
done
* Set Firefox Cache to RAM
in about:config set browser.cache.disk.enable to false
* change the file system mount options on SSDs to "noatime"
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I could not run the ubuntu live installcd and also the alternate hang sometimes. After a successful install X freezes. I tried to boot with various boot options. Only with acpi=off my system seams to working but with fan running and no battery info. An older knoppix was running, so i decided to install older ubuntu kernels and saw my system running with a gutsy kernel (2.6.22) but not with a hardy kernel (2.6.24).
What changed inside the kernel?
After searching a lot i found pci=nommconf.
It seams that something in the way pci is configured has changed.
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Searching for a rescue system that creates a bootable CD to restore my system i found mkcdrec. Because sometimes things (mkcdrec/debian/ubuntu) changes and i had to test and patch for new mkcdrec versions, so i droped it.
Then i started to make a live CD with debian-live and make my install script by myself. I also dropped it (long boottime and had too much to hack to let it work like i wanted).
Now i had the idea to build my own script that tar's my system and builds a bootable cd. I liked the idea of initramfs to extend it like i will and it boots much faster. The only drawback is that all things are hardcoded and have to be changed for every system i backup. But its only a single script: Read More...
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Searching for a rescue system that creates a bootable CD to restore my system i found mkcdrec. Because sometimes things (mkcdrec/debian/ubuntu) changes and i had to test and patch for new mkcdrec versions, so i droped it.
Then i started to make a live CD with debian-live and make my install script by myself. I also dropped it (long boottime and had too much to hack to let it work like i wanted).
Now i had the idea to build my own script that tar's my system and builds a bootable cd. I liked the idea of initramfs to extend it like i will and it boots much faster. The only drawback is that all things are hardcoded and have to be changed for every system i backup. But its only a single script: Read More...
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#> sudo apt-get install kqemu-source kqemu-common build-essential
#> sudo module-assistant prepare kqemu
#> sudo module-assistant auto-install kqemu
/etc/udev/rules.d/60-kqemu.rules:
KERNEL=="kqemu", NAME="%k", MODE="0660", GROUP="kqemu"
#> sudo addgroup --system kqemu
#> sudo adduser USERNAME kqemu
#> modprobe kqemu
create a qemu image:
#> qemu-img create -f qcow2 root.qcow2 20G
install with a cd:
#> qemu -hda root.qcow2 -cdrom cd.iso -boot d
boot installed system:
#> qemu -hda root.qcow2
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