On Tue, Dec 16, 2008 at 01:01:27PM +0100, Tomasz Chmielewski wrote:
> Is it possible to "freeze I/O" for some time to a given disk / md / dm
> device?
>
> Say, "freeze I/O" so that userspace waits for any response for 30, 60
> seconds or more?
For real disks you can use /sys/block/sdX/device/unload_heads to achieve
something similar (see Documentation/laptops/disk-shock-protection.txt
in the kernel source about how to use it). That won't work for md/dm
devices though.
Gabor
--
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MTA SZTAKI Computer and Automation Research Institute
Hungarian Academy of Sciences
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