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66 lines
2.0 KiB
Markdown
66 lines
2.0 KiB
Markdown
---
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created: 2012-08-20 20:27:16 +0200
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layout: redirect
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layout_old: default
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redirect_to: https://blog.mbirth.de/archives/2012/08/20/western-digital-greenpower-disks.html
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tags:
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- know-how
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- hardware
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- westerndigital
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- greenpower
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- wdgreen
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title: Western Digital GreenPower Disks
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toc: true
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updated: 2012-08-20 22:27:02 +0200
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---
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Advanced Format
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===============
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*Advanced Format* disks are optimized for 4kB sectors. To format them under Linux, use `parted` with `-a minimal` and unit type `s` (sectors). (see [here](http://wdc.custhelp.com/app/answers/detail/a_id/5655))
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IntelliPark
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===========
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*WD GreenPower* disks have some problems under Linux with their "head parking" feature parking the head every 8 seconds. This destroys the disk over a short time span.
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More info:
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* <http://www.sagaforce.com/~sound/wdantiparkd/>
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* <http://www.instantfundas.com/2011/12/intellipark-makes-western-digital-green.html>
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Temporary fix
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-------------
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To fix this, you have to disable it or set it to a more reasonable timeout:
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$ sudo hdparm -S 242 /dev/sdX
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You have to repeat this after each boot, so you may want to add the line to your `/etc/rc.local`.
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Permanent fix
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-------------
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To fix this permanently, you can compile the tool `wdidle3`. There's a bootable ISO available for download at [ngohq.com](http://www.ngohq.com/news/19805-critical-design-flaw-found-in-wd-caviar-green-hdds.html).
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For Linux, there's **idle3ctl** from the [idle3-tools](http://idle3-tools.sf.net/).
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You can display the current value with the following command:
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$ sudo ./idle3ctl -g /dev/sdX
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Idle3 timer set to 80 (0x50)
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The value 80 means 8 seconds (default). From 1-128, the values mean 1/10th of a second, e.g. 128 would be 12.8 seconds. 129-254 are in 30 seconds steps. 129 is 30 seconds, 130 is 60 seconds, etc.
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Set the desired value as follows:
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$ sudo ./idle3ctl -s 158 /dev/sdX
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Idle3 timer set to 158 (0x9e)
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Please power cycle your drive off and on for the new setting to be taken into account. A reboot will not be enough!
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Do as it says to enable the new setting. |