Ok, so it is possible to remove. Good to know, thanks . I move the pool maybe 
once a month for a few days, on an otherwise daily used fixed location. So 
thought the warm up allowance may be worth it. I guess I just wanted to know if 
adding a cache device was a one way operation or not and whether or not it 
risked integrity. 

Sent from my iPhone

On 13 Oct 2012, at 23:02, Ian Collins <i...@ianshome.com> wrote:

> On 10/14/12 10:02, Michael Armstrong wrote:
>> Hi Guys,
>> I have a "portable pool" i.e. one that I carry around in an enclosure. 
>> However, any SSD I add for L2ARC, will not be carried around... meaning the 
>> cache drive will become unavailable from time to time.
>> My question is.... Will random removal of the cache drive put the pool into 
>> a "degraded" state or affect the integrity of the pool at all? Additionally, 
>> how adversely will this effect "warm up"...
>> Or will moving the enclosure between machines with and without cache, just 
>> automatically work, and offer benefits when cache is available, and less 
>> benefits when it isn't?
> Why bother with cache devices at all if you are moving the pool around?  As 
> you hinted above, the cache can take a while to warm up and become useful.
> You should zpool remove the cache device before exporting the pool.
> -- 
> Ian.
zfs-discuss mailing list

Reply via email to