Occasional Thoughts

I found a documentation which describes how to disable the sync mount options

of

a subfs mounted device.
http://portal.suse.de/sdb/de/2005/06/dkukawka_halnosync_html.html

https://bugzilla.novell.com/show_bug.cgi?id=85413#c5
Mounting hotplugged devices without "sync"

-------------------------------------------
If writing to USB storage devices like USB sticks or USB hard drive is

rather slow or if you do not want synchronized writing to these devices,

disable the sync mount option.
1.

Create the directory /usr/share/hal/fdi/policy/95userpolicy:
mkdir -p /usr/share/hal/fdi/policy/95userpolicy/
2.

Create a file with the name nosync.fdi and the following contents:
vi /usr/share/hal/fdi/policy/95userpolicy/nosync.fdi
<?xml version="1.0" encoding="UTF-8"?>

<deviceinfo version="0.2">

<device>

<!-- disable sync for mount -->

<match key="block.is_volume" bool="true">

<match key="volume.fsusage" string="filesystem">

<match key="volume.uuid" string="==UUID==">

<merge key="volume.policy.mount_option.sync"

type="bool">false</merge>

</match>

</match>

</match>

</device>

</deviceinfo>
3.

Adjust the line  according to

your hardware. Run 'lshal' to retrieve the "volume.uuid" and enter this id

instead of ==UUID==
4.

Finally restart the HAL service with
rchal restart