Hot-changing a failed HDD with ahci.ko

[Patrick M. Hausen]

Hi!

Am 14.12.2011 um 10:26 schrieb Jeremy Chadwick:
>> What is the proper equivalent for ahci, ada0 and camcontrol?
> 
> None is needed: yank the disk, reinsert, wait a few seconds, done.
> Validation, with full output, hardware, etc:
> 
> http://koitsu.wordpress.com/2010/07/22/freebsd-and-zfs-hot-swapping-sata-disks-with-ahci/

Yank the disk:
(ada0:ahcich0:0:0:0): lost device

Reinsert - nothing happens.

>> shutdown -r now
>> -> system panics, eventually reboots
> 
> Before you yanked the disk, were any non-ZFS filesystems mounted?

Yes - my fault. I had an active swap partition on the disk which perfectly
explains the panic.

> You might try booting RELENG_9 (which has ahci.ko as the default, so no
> need to mess about) on a LiveCD or equivalent and attempt the same
> thing.  I'm left wondering if there's some stuff in RELENG_8 (not a typo
> compared to the above RELENG_9 reference) that you do not have in
> RELENG_8_2.

I'll try upgrading to RELENG_8 first and report the results.

Side note:
ada0: 150.000MB/s transfers (SATA 1.x, UDMA6, PIO 8192bytes)

I noticed that while preparing the last mail and removed those little jumpers
limiting my hard drives ;-)

Thanks,
Patrick
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