Here are my notes about setup of various stuff on Eee PC to make it work better for me.

Startup

Edit /usr/bin/startsimple.sh and insert something along following lines before exec icewm

 sudo rm /tmp/nologin

 xrdb -merge ~/.Xresources
 setxkbmap hr us
 xterm &

 exec icewm

Compressed root filesystem

I don't really care much about Xandos on my Eee PC. However, I really do like idea about having read-only system filesystem (especially if your startup scripts are breakable as easy as ones on eee are). So, to improve this idea, I started to think how to compress read-only partition so I can at least save space.

As a first experiment, I copied whole flash from eee (about 3.6Gb used) and compressed it using gzip -1 (lowest possible compression level). I was quite amazed to see that resulting archive was only 1.3Gb. So, I was up to something (and additional 2Gb of free space on 4Gb eee is also nice :-)

Update 2008-01-22

squashfs 3.3 can't compress comtent of eee's /usr without hanging on flock after about ~47000 files. This is quite annoying, but 3.2 works. Since it's compiled from upstream source it doesn't include lzma compression, but is saves 1.6Gb of disk space. More details is available, but in Croatian only.

Links

Here is collection of references about this issue:

Disk images

Backup image from Eee using external USB disk

dd if=/dev/sda of=/media/A/Partition1/flash4Gb.img

Path in of may be different depending on partition on your disk.

Backup flash image from Eee PC using network

Transfer somehow whole disk image to other computer. Good way might be to use netcat with something like this:

• on Eee

sudo nc -l -p 8888 < /dev/sda

• on other computer

nc name.of.eee.pc 8888 > hda

You might want to insert compression if your network connection is slower than flash read speed (which is according to hdparm -tT /dev/hda around 21MB/sec).

Alternative is to take P701L.gz from DVD which came with machine, but it has only one partition which is factory default one.

Backup just part of image

You can also copy just parts of flash filesystem if you want (this copies just disk after partition 2):

• on eee

dd if=/dev/sda bs=512 skip=4819500 | gzip | nc -w 3 other.computer
88882995524+0 records in
2995524+0 records out
1533708288 bytes (1.5 GB) copied, 279.348 seconds, 5.5 MB/s

• on other computer

nc -l -p 8888 | gzip -cd | > /rest/tmp/hda2-4

• now, ectract beginning of disk and first partition from P701L

dd if=P701L of=hda1 bs=512 count=4819500

• and merge partition together to create full disk image

cat hda1 hda2-4 > hda

Emulation

How to create virtual Eee PC?

Example flash image

# fdisk -l hda 

Disk /backup/eee/hda: 3 GB, 3997486080 bytes
255 heads, 63 sectors/track, 486 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

          Device Boot      Start         End      Blocks   Id  System 
/backup/eee/hda1               1         300     2409718   83  Linux
/backup/eee/hda2             301         484     1469947   83  Linux
/backup/eee/hda3             485         485           0    c  FAT32 LBA
/backup/eee/hda4             486         486           0   ef  EFI FAT

Mount file-system

We need first file system (factory defaults) to get access to kernel and initrd image

# fdisk -u -l hda 

Disk /backup/eee/hda: 3 GB, 3997486080 bytes
255 heads, 63 sectors/track, 486 cylinders, total 7807590 sectors
Units = sectors of 1 * 512 = 512 bytes

          Device Boot      Start         End      Blocks   Id  System 
/backup/eee/hda1              63     4803435     2409718   83  Linux
/backup/eee/hda2         4819563     7759395     1469947   83  Linux
/backup/eee/hda3         7775523     7775460           0    c  FAT32 LBA
/backup/eee/hda4         7791588     7791525           0   ef  EFI FAT
# mkdir 1
# mount hda 1 -o loop,offset=`expr 63 \* 512`

Start emulation

qemu -m 512 -hda hda -kernel boot/vmlinuz-2.6.21.4-eeepc -initrd boot/initramfs-eeepc.img -append "rw root=/dev/sda1"

Links

Suite of perl scripts in spirit of xen-tools but for OpenVZ

Installation

Install perl dependencies from Debian packages

This step is optional. If you don't want to use perl modules from packages provided by your distribution, skip this step, and modules will be automatically installed in next one.

sudo apt-get install libio-prompt-perl libregexp-common-perl libdata-dump-perl

Install utilities from Debian packages

sudo apt-get install host

Checkout source

svn co svn://svn.rot13.org/vz-tools/trunk vz-tools

Check and install perl modules from CPAN

cd vz-tools
perl Makefile.PL
make

Please note that there is no need to run make install

Tools are runnable from current directory. This will probably change in later versions.

Usage

This is quick hand-on overview of commands to get you started.

All commands must be started with root priviledges

vz-create.pl

This will perform following steps:

• Create new virtual machine bootstraped using debootstrap
• Change root password
• Create single user
• Make small custimization like installing vim and apt-iselect

All commands will be echoed on screen, even passwords. However, if you want to learn steps in creating OpenVZ VE, this is very helpful.

To run interactive session which asks questions use:

./vz-create.pl

Other alternative is to just enter hostname (defined in /etc/hosts for example)

./vz-create.pl my-new-ve.exmple.com

or by specifing IP adress

./vz-create.pl 192.168.42.42

vz-optimize.pl

vz-clone.pl

root@black:~/vz-tools# time ./vz-clone.pl create 1001
Clone VE 1001 -> 101001
found LV /dev/vg/vz for /vz
vzquota : (warning) Quota is running, so data reported from quota file may not reflect current values
quota for 1001 | 10485760 < 20971520 | usage: 7826792
using existing /dev/vg/vz-clone-101001
Mounting /dev/vg/vz-clone-101001 to /tmp/vz-clone-101001
rsync /vz/private/1001 -> /tmp/vz-clone-101001/private
101001 new IP number: 10.42.42.42
101001 new hostname: clone-42.example.com

Please review config file: /etc/vz/conf/101001.conf
Add NAT for new VE with: iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
Start clone of 1001 with: vzctl start 101001

real    1m57.347s
user    0m2.252s
sys     0m8.591s

Source

irc-logger is irc bot which records conversations, supports tags and create web archive of your conversations to enable better recall than from vague memory.

It supports several interesting features including tagging// (just add two slashes at end of the word, and it becomes tag in web archive)

Very small Jifty application which enables execution of perl code within browser. This is a gapping security hole. You have been warned. Source code is in subversion so feel free to checkout it and play with it.

Aside from that, it's a nice tool to learn perl on the web, without need to install anything on local machine. In fast, that's why it was written.

Features:

• upload or copy/paste code or input
• edit code using JavaScript syntax highlighted editor
• run scripts from browsers and get command-line equivalent output
• resolve dependencies within code (needed to dump all files required for run)

Security holes:

• It execute any code entered by user on server. It will timeout it after 5s (configurable in config.yml)
• User can require any module installed on system (there is FIXME comment in code, but I'm not sure that white listing of modules would be usable).

Grep is RSS feed searcher and cacher. Actually, more correct is to think about Grep as your search console.
If you are into buzzword land, you can even call that information worker workbench but, enough of that.

It's mostly useful with web sites that provide search results as RSS feed. If they include full content in feeds even better. One example of such web service is SocialText wiki for which Grep was originally written.

I know that I wrote it in some wiki workspace, but where ?!

Following that idea, Grep gained powerful plugin mechanism which enable users (err, developers who can write 10-line perl module) to scrape any site which has form or rest API and produce search results as links. While doing that, it will also fetch result pages and cache them locally. Have in mind that this is a slow process which puts much load on remote server, so use it sparsely. However, once remote results are fetched, they are always available in local cache for quick reference, even when offline!

For now, here is a feature list:

• cache all results locally, great for off-line use
• supports credential spoofing using Cookies (useful to login into protected areas)
• comes with easy bookmarklet subscribe helper
• written using Jifty and KinoSearch
• scrapers for other wikis and CMS engines which can be source of items for Grep
• de-duplicate local results (based on near duplicates detection which is great for sites which change just slightly like wikis)
• import local html pages from ScrapBook FireFox plugin

Source code is in development Subversion repository

Materijali za Virtualizacija na Linuxu -- jednostavan izbor zar ne?

• Virtualisation in Debian - Present and future - DebConf 2008

Hardware

CPU

Support for hardware virtualization:

egrep '^flags.*(vmx|svm)' /proc/cpuinfo

How much CPU do I use? :-)

dpavlin@brr:~$ cpufreq-info 
cpufrequtils 004: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to cpufreq@lists.linux.org.uk, please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which need to switch frequency at the same time: 0
  hardware limits: 2.40 GHz - 3.20 GHz
  available frequency steps: 3.20 GHz, 2.80 GHz, 2.40 GHz
  available cpufreq governors: userspace, powersave, ondemand, conservative, performance
  current policy: frequency should be within 2.40 GHz and 3.20 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 2.40 GHz.
  cpufreq stats: 3.20 GHz:1.80%, 2.80 GHz:0.00%, 2.40 GHz:98.20%  (17)

Disk performance

dpavlin@llin:~$ sudo hdparm -i /dev/sda

/dev/sda:

 Model=FUJITSU MHV2080BH                       , FwRev=00840028, SerialNo=        NW05T6B29HM5
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
 BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=?16?
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=156301488
 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4 
 DMA modes:  mdma0 mdma1 mdma2 
 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 
 AdvancedPM=yes: mode=0x80 (128) WriteCache=enabled
 Drive conforms to: unknown:  ATA/ATAPI-3,4,5,6,7

 * signifies the current active mode

dpavlin@llin:~$ sudo hdparm -tT /dev/sda
/dev/sda:
 Timing cached reads:   1566 MB in  2.00 seconds = 782.85 MB/sec
 Timing buffered disk reads:   66 MB in  3.03 seconds =  21.79 MB/sec

hdparm -m 16 -a 16 /dev/sda

dpavlin@llin:~$ sudo hdparm -tT /dev/sdb

/dev/sdb:
 Timing cached reads:   1508 MB in  2.00 seconds = 753.72 MB/sec
 Timing buffered disk reads:   56 MB in  3.03 seconds =  18.48 MB/sec

dpavlin@brr:~$ sudo hdparm -i /dev/sdd

/dev/sdd:

 Model=WDC WD5000AAKS-00YGA0                   , FwRev=12.01C02, SerialNo=     WD-WCAS80929678
 Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=50
 BuffType=unknown, BuffSize=16384kB, MaxMultSect=16, MultSect=?16?
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=976773168
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio3 pio4 
 DMA modes:  mdma0 mdma1 mdma2 
 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6 
 AdvancedPM=no WriteCache=enabled
 Drive conforms to: Unspecified:  ATA/ATAPI-1,2,3,4,5,6,7

 * signifies the current active mode

dpavlin@brr:~$ sudo hdparm -tT /dev/sda /dev/sdb /dev/sdd

/dev/sda:
 Timing cached reads:   1982 MB in  2.00 seconds = 991.18 MB/sec
 Timing buffered disk reads:  232 MB in  3.03 seconds =  76.67 MB/sec

/dev/sdb:
 Timing cached reads:   2010 MB in  2.00 seconds = 1004.95 MB/sec
 Timing buffered disk reads:  228 MB in  3.01 seconds =  75.85 MB/sec

/dev/sdd:
 Timing cached reads:   2006 MB in  2.00 seconds = 1003.01 MB/sec
 Timing buffered disk reads:  230 MB in  3.01 seconds =  76.47 MB/sec

dpavlin@brr:~$ cat /proc/mdstat 
Personalities : [raid6] [raid5] [raid4] 
md0 : active raid5 sdd1[0] sda1[2] sdb1[1]
      976767872 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU]

dpavlin@brr:~$ sudo hdparm -tT /dev/md0

/dev/md0:
 Timing cached reads:   1986 MB in  2.00 seconds = 993.20 MB/sec
 Timing buffered disk reads:  434 MB in  3.01 seconds = 144.41 MB/sec

root@brr:~# hddtemp /dev/sda /dev/sdb /dev/sdd
/dev/sda: WDC WD5000AAKS-00YGA0: 33°C
/dev/sdb: WDC WD5000AAKS-00YGA0: 32°C
/dev/sdd: WDC WD5000AAKS-00YGA0: 32°C

root@brr:~# smartctl --all /dev/sda | head -20
smartctl version 5.38 [i686-pc-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Second Generation Serial ATA family
Device Model:     WDC WD5000AAKS-00YGA0
Serial Number:    WD-WCAS80815866
Firmware Version: 12.01C02
User Capacity:    500,107,862,016 bytes
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   8
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Sat Oct 11 00:27:01 2008 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

KVM

sudo apt-get install kvm

/rest           192.168.1.0/255.255.255.0(rw)

dpavlin@llin:~$ sudo /etc/init.d/nfs-user-server start

dpavlin@squeak:~$ mkdir mnt/rest
dpavlin@squeak:~$ sudo mount 192.168.1.13:/rest mnt/rest/
dpavlin@squeak:~$ ls -al mnt/rest/iso/gparted-live-0.3.9-4.iso 
-rw-r--r-- 1 dpavlin dpavlin 98347008 Oct  9 17:31 mnt/rest/iso/gparted-live-0.3.9-4.iso

dpavlin@squeak:~$ kvm -cdrom mnt/rest/iso/gparted-live-0.3.9-4.iso -incoming tcp://0:4444 -monitor stdio

dpavlin@llin:~$ kvm -m 128 -cdrom /rest/iso/gparted-live-0.3.9-4.iso -monitor stdio -no-kvm
QEMU 0.9.1 monitor - type 'help' for more information
(qemu) migrate tcp://192.168.1.30:4444

QEMU

sudo apt-get install qemu kqemu-source

sudo module-assistant a-i kqemu

VirtualBox

root@llin:~# module-assistant a-i virtualbox-ose

VBoxManage createvm -name "VirtWorkshop" -register
VBoxManage modifyvm VirtWorkshop -memory 512Mb -acpi on -boot1 dvd -nic1 nat -dvd /rest/iso/ScummVM\ Launcher\ 2.iso 
VBoxManage createvdi -filename hda-8Gb.vdi -size 8Mb -register
VBoxManage modifyvm VirtWorkshop -hda hda-8Gb.vdi
VBoxHeadless -startvm VirtWorkshop

dpavlin@x200:/virtual/win$ vboxmanage internalcommands converttoraw hda-winxp.vdi hda.img
VirtualBox Command Line Management Interface Version 2.1.4_OSE
(C) 2005-2009 Sun Microsystems, Inc.
All rights reserved.

Converting image "hda-winxp.vdi" with size 8589934592 bytes (8192MB) to raw...

OpenVZ

dpavlin@zut:~$ sudo hdparm -tT /dev/cciss/c1d0 /dev/sda

/dev/cciss/c1d0:
 Timing cached reads:   2184 MB in  2.00 seconds = 1092.39 MB/sec
 Timing buffered disk reads:  324 MB in  3.02 seconds = 107.40 MB/sec

/dev/sda:
 Timing cached reads:   2144 MB in  2.00 seconds = 1071.89 MB/sec
 Timing buffered disk reads:  136 MB in  3.02 seconds =  45.02 MB/sec

root@koha-hw:~# vgextend -L +80G /dev/vg/vz
vgextend: invalid option -- L
  Error during parsing of command line.

root@koha-hw:~# lvextend -L +80G /dev/vg/vz
  Extending logical volume vz to 100.00 GB
  Logical volume vz successfully resized

root@koha-hw:~# resize2fs /dev/vg/vz 
resize2fs 1.40-WIP (14-Nov-2006)
Filesystem at /dev/vg/vz is mounted on /vz; on-line resizing required
old desc_blocks = 2, new_desc_blocks = 7
Performing an on-line resize of /dev/vg/vz to 26214400 (4k) blocks.
The filesystem on /dev/vg/vz is now 26214400 blocks long.

root@koha-hw:~# df -h /vz/
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg-vz      99G   20G   79G  21% /vz

root@koha-hw:~# vzlist -o veid,diskspace,diskspace.s,diskspace.h,diskinodes,diskinodes.s,diskspace.h
      VEID   DQBLOCKS DQBLOCKS.S DQBLOCKS.H   DQINODES DQINODES.S DQBLOCKS.H
    212052   11717220   15728640   20971520      61001     286527   20971520
    212226    6407804   10485760   12582912      69011     435472   12582912

root@koha-hw:~# vzlist -o veid -H | xargs -i sh -c "echo --{}-- ; vzctl exec {} df -h"
--212052--
Filesystem            Size  Used Avail Use% Mounted on
simfs                  15G   12G  3.9G  75% /
tmpfs                 2.0G     0  2.0G   0% /lib/init/rw
tmpfs                 2.0G     0  2.0G   0% /dev/shm
--212226--
Filesystem            Size  Used Avail Use% Mounted on
simfs                  10G  6.2G  3.9G  62% /
tmpfs                 2.0G     0  2.0G   0% /lib/init/rw
tmpfs                 2.0G     0  2.0G   0% /dev/shm

root@koha-hw:~# vzlist -o veid -H | xargs -i vzctl set {} --diskspace 100G:100G --save
Saved parameters for VE 212052
Saved parameters for VE 212226

vzlist -H -o veid | xargs -i vzctl exec {} 'apt-get update && apt-get -y upgrade' 2>&1 | tee ~/log

# install dependencies which are not part of standard lenny (sorry!)
cpanp i IPC::System::Simple

dpavlin@mjesec:~$ vzps -E axv --no-headers \
  | groupby.pl 'sum:($7+$8+$9*1024),1,count:1' --join 'sudo vzlist -H -o veid,hostname' --on 2 \
  | sort -rn | align | sum.pl -h
webgui.rot13.org  23      1026M OOOOOOOOOOOO                              1026M
0                385       855M OOOOOOOOOO------------                    1882M
saturn.ffzg.hr    32       544M OOOOOO-----------------------             2427M
eprints.ffzg.hr   18       351M OOOO-----------------------------         2778M
arh.rot13.org     20       224M OO----------------------------------      3003M

root@mljac:~# ps ax | grep getty | cut -c-5 | xargs vzpid
Pid     VEID    Name
5668    0       getty
5670    0       getty
5672    0       getty
5673    0       getty
5674    0       getty
5675    0       getty
9503    207016  getty
9504    207013  getty
9505    207013  getty
9534    207016  getty
9535    207015  getty
9536    207013  getty
9537    207013  getty
9538    207015  getty
9539    207015  getty
9540    207015  getty
9541    207016  getty
9542    207015  getty
9543    207016  getty
9545    207013  getty
9546    207013  getty
9547    207015  getty
9548    207016  getty

dpavlin@brr:/dev$ vzctl set 100 --devices c:10:229:rw --save

sudo apt-get install libio-prompt-perl libregexp-common-perl libdata-dump-perl

sudo apt-get install host

svn co svn://svn.rot13.org/vz-tools/trunk vz-tools

cd vz-tools
perl Makefile.PL
make

./vz-create.pl

./vz-create.pl my-new-ve.exmple.com

./vz-create.pl 192.168.42.42

root@black:~/vz-tools# time ./vz-clone.pl create 1001
Clone VE 1001 -> 101001
found LV /dev/vg/vz for /vz
vzquota : (warning) Quota is running, so data reported from quota file may not reflect current values
quota for 1001 | 10485760 < 20971520 | usage: 7826792
using existing /dev/vg/vz-clone-101001
Mounting /dev/vg/vz-clone-101001 to /tmp/vz-clone-101001
rsync /vz/private/1001 -> /tmp/vz-clone-101001/private
101001 new IP number: 10.42.42.42
101001 new hostname: clone-42.example.com

Please review config file: /etc/vz/conf/101001.conf
Add NAT for new VE with: iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
Start clone of 1001 with: vzctl start 101001

real    1m57.347s
user    0m2.252s
sys     0m8.591s

VMWare

Convert image to monolithic growable disk

This format is supported by other emulators, so it's a best choice.

dpavlin@llin:/rest/vmware/winxp$ vmware-vdiskmanager -r Windows\ XP\ Professional.vmdk -t 0 /mnt/usb/vmware/win-xp.vmdk 
Using log file /tmp/vmware-dpavlin/vdiskmanager.log
Creating a monolithic growable disk '/mnt/usb/vmware/win-xp.vmdk'
  Convert: 57% done.

vmware-vdiskmanager error messages

Have in mind that vmware-vdiskmanger doesn't have a really helpful error messages:

dpavlin@tab:/mnt/brr/virtual/winxp$ vmware-vdiskmanager -r Windows\ XP\ Professional.vmdk -t 0 /virtual/win-xp.vmdk
Using log file /tmp/vmware-dpavlin/vdiskmanager.log
Creating a monolithic growable disk '/virtual/win-xp.vmdk'
Failed to convert disk: The destination file system does not support large files (13).

is really permission denied !

Resize disk image

dpavlin@llin:/mnt/usb/vmware$ qemu-img info win-xp.vmdk
(VMDK) image open: flags=0x2 filename=win-xp.vmdk
image: win-xp.vmdk
file format: vmdk
virtual size: 3.0G (3221225472 bytes)
disk size: 3.0G

There is a way to extend image using only qemu-img, but that involves converting image to raw and appending zeros at end to produce larger image. However, we will do that using VMWare's vmware-vdiskmanager

dpavlin@llin:/mnt/usb/vmware$ vmware-vdiskmanager -x 6Gb win-xp.vmdk
Using log file /tmp/vmware-dpavlin/vdiskmanager.log
  Grow: 100% done.
The old geometry C/H/S of the disk is: 6241/16/63
The new geometry C/H/S of the disk is: 12483/16/63
Disk expansion completed successfully.

WARNING: If the virtual disk is partitioned, you must use a third-party
         utility in the virtual machine to expand the size of the
         partitions. For more information, see:
         http://www.vmware.com/support/kb/enduser/std_adp.php?p_faqid=1647

This will make disk unbootable, so we will have to resize partition. Download GParted live CD and resize partition using it...

kvm -m 512 -hda win-xp.vmdk -no-acpi -std-vga -cdrom /rest/iso/gparted-live-0.3.9-4.iso -boot d

Convert vmdk to qcow

dpavlin@llin:/mnt/usb/vmware$ qemu-img convert -O qcow win-xp.vmdk win-xp.qcow
(VMDK) image open: flags=0x2 filename=win-xp.vmdk
dpavlin@llin:/mnt/usb/vmware$ ls -al win-xp.*
-rw-r--r-- 1 dpavlin dpavlin 3190906880 Oct  9 17:41 win-xp.qcow
-rw------- 1 dpavlin dpavlin 3208577024 Oct  9 17:35 win-xp.vmdk

Xen

disk speed

this is domU

root@vega:~# uname -a
Linux vega 2.6.18-6-xen-amd64 #1 SMP Mon Jun 16 23:42:47 UTC 2008 x86_64 GNU/Linux
root@vega:~# hdparm -tT /dev/hda1

/dev/hda1:
 Timing cached reads:   5488 MB in  2.00 seconds = 2750.74 MB/sec
 Timing buffered disk reads:  318 MB in  3.00 seconds = 105.98 MB/sec

resize domU image

• Resizing domU partitions with Xen Enterprise 3.2, good stuff, even if you are not interested in Xen!

proxmox

proxmox is bare metal Debian 64-bit installation supporting containers using OpenVZ and full system emulation using KVM.

Linux Containers

OpenVZ isn't only linux container solution:

• LSM, SELinux and Smack
• LXC: Linux container tools

Guest OS

Windows

• agp440.sys killed my VMWare XP installation!

• intelppm.dll blue screen of death -- http://kvm.qumranet.com/kvmwiki/Windows_ACPI_Workaround

• Install VBEMP x86 Project Universal VESA/VBE Video Display Driver to get different resolutions on virtual machine

Remove them:

cd c:\windows\system32\drivers
del agp440.sys
del intelppm.dll

Startup script:

# 3M RFID 810
usbdev=0403:6001

sudo chown -R $USER /proc/bus/usb/*

kvm -m 512 -hda win-xp.vmdk -no-acpi -std-vga -monitor stdio -usb -usbdevice host:$usbdev

USB sniffing:

info usbhost

Solaris

• http://opensolaris.org/os/project/qemu/QEMUGuests/guest/

It will not boot pass "Loading Nexenta..." stage without kvm module loaded.

# to install from iso image
kvm -m 512 -hda solaris.vmdk -cdrom ../iso/nexenta-core-platform_1.0.1-b85-test4_x86.iso -boot d -net nic,model=rtl8139 -net user

# run after installation
kvm -m 512 -hda solaris.vmdk -net nic,model=rtl8139 -net user

Darwin

• http://www.puredarwin.org/

Plan 9

• http://wiki.glugcen.dc.uba.ar/Empezando_con_Plan9
• http://www.oszoo.org/wiki/index.php/Plan9_070107.zip

Links

Is Linux going wrong way with btrfs as solution to all storage problems? Linux and object storage devices

Second try at buying USB TV card that works under Linux

And sure, 22 EUR later (chepest card in the shop which included remote) I had working DVB-T under Linux

Info

http://linuxtv.org/wiki/index.php/Hauppauge_WinTV-NOVA-T-Stick

Firmware

cd /lib/firmware/
wget http://www.wi-bw.tfh-wildau.de/~pboettch/home/linux-dvb-firmware/dvb-usb-dib0700-1.10.fw

info

dpavlin@t61p:~$ lsusb | grep Nova
Bus 002 Device 003: ID 2040:7070 Hauppauge Nova-T Stick 3

Zagreb frequencies

T 754000000 8MHz 2/3 NONE AUTO 8k 1/8 NONE    # CH27:
T 642000000 8MHz 2/3 NONE AUTO 8k 1/8 NONE    # CH27:
T 690000000 8MHz 2/3 NONE AUTO 8k 1/8 NONE    # CH27:

Feed that file to scan from dvb-apps to get output for mplayer's channels.conf

EeePC as TV for my mother

dmesg

[352538.540055] usb 3-1.1: new high-speed USB device number 32 using ehci-pci
[352538.648944] usb 3-1.1: New USB device found, idVendor=2040, idProduct=7070, bcdDevice= 1.00
[352538.648951] usb 3-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[352538.648956] usb 3-1.1: Product: Nova-T Stick
[352538.648960] usb 3-1.1: Manufacturer: Hauppauge
[352538.648964] usb 3-1.1: SerialNumber: 4032258708
[352538.682065] dvb-usb: found a 'Hauppauge Nova-T Stick' in cold state, will try to load a firmware
[352538.682869] usb 3-1.1: firmware: direct-loading firmware dvb-usb-dib0700-1.20.fw
[352538.885559] dib0700: firmware started successfully.
[352539.420241] dvb-usb: found a 'Hauppauge Nova-T Stick' in warm state.
[352539.420476] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[352539.420571] dvbdev: DVB: registering new adapter (Hauppauge Nova-T Stick)
[352539.664695] usb 3-1.1: DVB: registering adapter 0 frontend 0 (DiBcom 7000PC)...
[352539.903507] dib0070: DiB0070: successfully identified
[352539.936061] Registered IR keymap rc-dib0700-rc5
[352539.936410] rc rc0: Hauppauge Nova-T Stick as /devices/pci0000:00/0000:00:1d.0/usb3/3-1/3-1.1/rc/rc0
[352539.936486] input: Hauppauge Nova-T Stick as /devices/pci0000:00/0000:00:1d.0/usb3/3-1/3-1.1/rc/rc0/input13
[352539.936674] rc rc0: lirc_dev: driver dib0700 registered at minor = 0, scancode receiver, no transmitter
[352539.936678] dvb-usb: schedule remote query interval to 50 msecs.
[352539.936682] dvb-usb: Hauppauge Nova-T Stick successfully initialized and connected.
[352539.936876] usbcore: registered new interface driver dvb_usb_dib0700

scan

• https://www.linuxtv.org/wiki/index.php/Scan
• https://www.linuxtv.org/wiki/index.php/Testing_your_DVB_device

dpavlin@klin:~$ mkdir ~/.{a,c,s,t}zap


dpavlin@klin:~$ scan -v /usr/share/dvb/dvb-legacy/dvb-t/hr-All > .tzap/channels.conf

dumping lists (4 services)
[0015]:690000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:2011:2012:21
[0016]:690000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:2021:2022:22
[0017]:690000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:2031:2032:23
[0018]:690000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:2041:2042:24

dpavlin@klin:~$ /usr/bin/tzap -r -c ~/.tzap/channels.conf "[0018]"
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
reading channels from file '/home/dpavlin/.tzap/channels.conf'
Version: 5.11    FE_CAN { DVB-T }
tuning to 690000000 Hz
video pid 0x07f9, audio pid 0x07fa
status 0f | signal 9dca | snr 00ad | ber 001fffff | unc 00000000 | 
status 1f | signal 9cd0 | snr 00bc | ber 000060a0 | unc 00000000 | FE_HAS_LOCK

dpavlin@klin:~$ mplayer /dev/dvb/adapter0/dvr0