Pack of CAM improvements

[Harald Schmalzbauer]

Alexander Motin schrieb am 19.01.2010 17:12 (localtime):
...
> Patch can be found here:
> http://people.freebsd.org/~mav/cam-ata.20100119.patch
> 
> Feedback as always welcome.

Again, thanks a lot for your ongoing great work!
The patch doesn't cleanly apply with vpo, but I don't use vpo so I 
didn't care.
Otherwise I couldn't find any problems.
The system detects reinserted SATA drives on ICH9 fine.

This was tested on a zfs backup server which went to the backbone 
yesterday, so I can't physically remove any devices any more for testing...

But I had some questions about zfs raidz states. I think that isn't a 
matter of atacam but if I removed one disk, zpool status still showed me 
the ada3 device "online".
After reinserting (and proper detection/initialisazion with cam, ada3 
was present again) and zpool clean, it set the devicea as UNAVAIL sinve 
I/O errors.
I coudn't get the device into the pool again, no matter what I tried.
Only rebooting the machine helped. Then I could clean and scrub.

What are the needed steps to provide a reinsterted hard disk to geom? 
With the latest patches I don't need to issue any reset/rescan comman, 
right?
So it's a zfs problem, right? My mistake in understanding?

Thanks,

-Harry

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