On Wed, Oct 07, 2009 at 12:03:01AM +0200, Wouter Verhelst wrote:
> > with the raid1 setup below if the nbd-server stops nbd-client dies too, the 
> > /dev/nbd0 device
> > disappears
> 
> What do you mean by 'the device disappears'? The device node will not go
> away; do you just mean to say that the connection is lost?

Sorry, I mean disappearing from /proc/partitions.

> What happens if you wait "timeout" seconds and try to read from the
> device manually (e.g., by doing "dd if=/dev/nbd0 of=/dev/zero count=1")?

The nbd-client dies, and the partition is no longer in /proc/partitions.

# dd if=/dev/nbd0 of=/dev/zero count=1
0+0 records in
0+0 records out
0 bytes (0 B) copied, 3.9789e-05 s, 0.0 kB/s

dd on a never used /dev/nbd* device reports the same.

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