Raspberry Pi

From Holyheads Wiki
(Difference between revisions)
Jump to: navigation, search
(→‎External USB drives)
(→‎External USB drives)
Line 11: Line 11:
 
** TODO: describe build process + udev rules from open elec
 
** TODO: describe build process + udev rules from open elec
  
−
* How to overcome poor performance?
+
* How to increase performance?
 
** Mount with option ''''noatime'''' or ''''relatime''''
 
** Mount with option ''''noatime'''' or ''''relatime''''
 
** Mount ''without'' option sync (e.g. keep default async)
 
** Mount ''without'' option sync (e.g. keep default async)

Revision as of 19:37, 31 December 2013

Contents

Cockbook

My collection of hints, tips and tricks (supporting my memory and maybe also helping others).

External USB drives

  • How to increase performance?

Samba server / NAS

  • Slow disc performance?
    • see 'Slow USB drives' above
    • use Raspbian, etc without GUI to get as much CPU power for file-transfer as possible (OpenELEC or RaspBMC constantly result in about 10-20% CPU load when idle, use top to check!)

Misc Q&A

  • Q: Does Raspberry support WOL?
A: No: the Ethernet chip is connected via USB (http://www.raspberrypi.org/forum/viewtopic.php?f=53&t=39714)
  • Q: The new password is to short, or too simple
A: Try adjusting the PAM settings in /etc/pam.d/common-password:
  • remove the 'obscure' setting for pam_unix.so, and add your desired minimum length (e.g. minlen=2) 
 password        [success=1 default=ignore]      pam_unix.so sha512 minlen=2
!! This is not recommended if your box is connected to the internet or if it contains private data noone should know!!
But it's nice for testing (if you cannot or do not want to use auto-login.)
  • Q: How to configure static IP?
A: In /etc/network/interfaces: 
 iface eth0 inet static
   address 192.168.0.31
   netmask 255.255.255.0
   gateway 192.168.0.1
  • Q: How to read core temperature, etc?
A: vcgencmd: $vcgencmd measure_temp
  • External USB HDD spin down
    • hdparm does not work with my WD Elements (SG_IO: bad host status: 0x7)
    • hd-idle works: 
hd-idle -a sda -i 600
for details, see for example http://blog.is-a-geek.org/festplatten-in-den-standby-modus-versetzen-unter-ubuntu-desktopserver-mit-hd-idle (German)

Useful stuff

Things I want to (or might) try sometime

  • Explore overclocking limits of my RaspBerry - currently I'm using medium set via raspi-config
--> Raspberry Pi Stress Tests
  • NAS/Samba
  • try adjusting 'socket options' in (/etc/samba/smb.conf) to increase NAS performance: some websites recommend to disable the 'socket options', some recommend to set: 
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=65536 SO_SNDBUF=65536
  • adjust memory split - smaller GPU memory for server
  • ext4 vs ntfs for storage drive

Some links

Project sites

Blogs, forums, etc

Misc

Manuals

to be continued ...

Retrieved from "https://holyhead.de/index.php?title=Raspberry_Pi&oldid=54"
Personal tools