ATA -- erratic behaviour when removing disk

[Miroslav Lachman]

Jeremy Chadwick wrote:

> Is anyone aware of the situation where FreeBSD behaves erratically when
> a disk is physically removed without "atacontrol detach ataX" being run
> prior to removal (at least on RELENG_7)?

I can confirm this behaviour on FreeBSD 6.2. It sometimes freezes or 
panic when I atacontrol detach ataX and then physically remove the disk. 
(disk is used in gmirror). I saw some panics on reinsertion too. The 
strange is that it behaves better when disk is removed / reinserted 
without detaching ata channnel by atacontrol.
(tested on Sun Fire X2100)

Miroslav Lachman