Difference between revisions of "HDAPS"

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(→‎How to install the driver)
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# cd /usr/src/linux
 
# cd /usr/src/linux
 
# Untar hdaps-(whatever).tar.gz, which you can download at the link above
 
# Untar hdaps-(whatever).tar.gz, which you can download at the link above
−
## Note that the tarball contains a subdirectory called ./user whereas the kernel has a subdirectory called ./usr .. i'm not yet sure if that matters, because i haven't been able to get this to work yet, but as soon as i do, i'll let you know.
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  Note that the tarball contains a subdirectory called ./user,
 +
  whereas the kernel has a subdirectory called ./usr
 +
  I'm not yet sure if that matters, because i haven't been able to get this to work yet, but as soon as i do, i'll let you know.
 
# Recompile the kernel however it's usually done in your distro
 
# Recompile the kernel however it's usually done in your distro
 
# Figure out the rest yourself
 
# Figure out the rest yourself

Revision as of 22:10, 16 May 2006

HDAPS - IBM Active Protection System Linux Driver

This is the Linux driver for monitoring the acceleratometer known as IBM Active Protection System.

The driver only enables reading of the acceleration data. It does not perform automatic disk head parking. But there are already some other useful applications for HDAPS, using the /sys interface it provides.

Features

  • provides accelerometer values via sysfs
  • provides a joystick type input device

Project Homepage / Availability

  • Project Homepage
  • The driver is included in the 2.6-mm series of kernels since August, 26th 2005.
  • The driver is now in the mainline (2.6.14). (use as modul if you want use tp_smapi, Gentoo and X41)

Status

A driver is included in recent Linux kernels and is actively maintained.

How to install the driver

If you are using a version of the Linux kernel < 2.6.14, follow these steps.

  1. cd /usr/src/linux
  2. Untar hdaps-(whatever).tar.gz, which you can download at the link above
 Note that the tarball contains a subdirectory called ./user,
 whereas the kernel has a subdirectory called ./usr
 I'm not yet sure if that matters, because i haven't been able to get this to work yet, but as soon as i do, i'll let you know.
  1. Recompile the kernel however it's usually done in your distro
  2. Figure out the rest yourself
  3. Edit this wiki page and explain how you did it

(Note: this is a work in progress, and i hope to improve it in the next few days)

Harddisk Protection

As mentioned above, the hdaps kernel driver is only responsible for reading the accelerometer data and exporting it through the sysfs interface. In order to use this information to protect the disk, some additional steps are required.

See How to protect the harddisk through APS.

Input device support

The hdaps driver in the lastest kernels (2.6.14 and later?) also exports a joystick type input device, which can be used by games.

Applications

Disk head parking

See How to protect the harddisk through APS for more information.

Security & safety

Tilt monitoring

  • gkhdaps a GKrellM applet displaying tilt data
  • gnome-tilt a gnome applet showing tilt data

Visualisation (of ThinkPad orientation)

Games

  • Robert Love mentions a Neverball patch on his blog to keep the display aligned. However, the link there seems broken.

Interesting links related to this project

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