ada drives keep timing out!

[Dr Josef Karthauser]

> On 20 Feb 2015, at 11:14, Bob Bishop <rb at gid.co.uk> wrote:
> 
> Hi,
> 
>> On 20 Feb 2015, at 10:34, Dr Josef Karthauser <joe at tao.org.uk> wrote:
>> 
>> Hi there,
>> 
>> I reported this last year, but I’d like to revisit it as it must have a software remedy. I know that I’m not the only one to have reported the problem.
>> 
>> I have a ZFS pool with a number of western digital drives in it (WDC WD1000FYPS-01ZKB0 02.01B01).
> 
> WD Green Power drives. I've had similar problems, sometimes they take a looooong time to come ready; the controller times out waiting for drive ready and the rest you know.
> 
> Depending on the controller there may be nothing you can do. Maybe it's possible to turn off the drives's green features. I replaced the drives with something that works. 
> 

Hi Bob,

In this case other report no such issues on the same hardware running Linux, so it seems to me to be an internal timeout issue within FreeBSD, or maybe Linux retries more than FreeBSD and so doesn’t experience the issue that we do. It’s clear that FreeBSD is proactively disconnecting the drive when the timeout occurs. So, maybe there’s something that can be done there.

Joe