Slow 12.04 on a Netbook with LVMs
lproven at gmail.com
Thu Apr 25 02:38:45 UTC 2013
On 24 April 2013 18:35, Amichai Rotman <amichai at iglu.org.il> wrote:
> I have an Asus EeePC running 12.04.2 set up with 3 Pencrypted partitions:
> One for the / (System); One for swap and one for /home
> The system becomes slower and slower. I noticed that the encrypted
> partitions are set up as extended (=not primary). I read somewhere that that
> slows down the file access.
Do not worry. Primary/secondary imposes no measurable performance
change - nor does position on disk, contrary to what some people will
tell you. I've tried and tested it; it makes no difference consistent
to the 2nd decimal place of a percentage. That is no difference at
all, it's within measurement and experimental error.
What /will/ slow the machine down drastically is encryption!
Consider just encrypting /home. The stuff in the other partitions has
little that is traceable and it is hard to find.
> I want to redo the installation, and I have a few questions:
> Can I use an external hard drive formatted as NTFS to backup the files on
> /home (ext4)?
No, not AFAIK.
> I want to create only primary type partitions, I remember that it asks for
> an extended type partition when configuring the encryption.
Don't. The "correct" was is 1 primary + all the others as logicals
inside an extended partition. Make / the primary and /home and swap
> I'd like to create the swap space as a file, not a partition.
Possible but saps performance (marginally, in theory; allegedly Linux
>=2.6 ameliorates this).
If you have 1-2GB of RAM, try zRam and no swap at all. Works well for me.
(The 2nd and 4th answers work and are the easiest.)
> It's a 160Gb SATA drive. I need as much space as possible for my Data files.
> What would be the best way to partition the drive?
How much RAM do you have? If you have >1GB you could possibly do
without swap; if you have >2GB you almost certainly could.
I would use:
primary, 8GB, for /
Extended for all the rest
Inside that, (all the available space - (RAM × 2) as /home, encrypted
if you feel you need to), and at the end, (2×RAM as swap). That gives
you plenty of space for hibernation support.
> What's the best way to configure the LVMs?
LVM? Don't. With a single disk, you don't need it.
Liam Proven • Profile: http://lproven.livejournal.com/profile
Email: lproven at cix.co.uk • GMail/G+/Twitter/Flickr/Facebook: lproven
MSN: lproven at hotmail.com • Skype/AIM/Yahoo/LinkedIn: liamproven
Tel: +44 20-8685-0498 • Cell: +44 7939-087884
More information about the ubuntu-users