Using ZFS as RAID0 - disk offline question

[Kaya Saman]

Hi,

in ZFS when using a simple RAID 0 style array is there a way to recover 
a pool after a disk has gone down?

Or remove a disk from the pool to shrink it?


To be more specific this is what I'm simulating at the moment:


zpool create ZPOOL_1 /mnt/disk1 /mnt/disk2

zpool status shows disk1 and disk2 as being part of ZPOOL_1 and ZPOOL_1 
is ONLINE.


However, if I should ever want to remove disk2 from the pool or if disk2 
has gone down how would one go about getting the ZPOOL_1 back online?


I am hoping that there is a solution to just running the pool with 1 disk.


Or if the disk name changes ie. simulating a disk number to change after 
moving it to a different controller or so internally.

I am just trying to see what would happen as RAIDZ or RAID1 is very good 
however what about RAID0 in the situation above.


I guess one could call this as disaster recovery for the unprepared :-)


In actual fact I have done this physically on a Mini-ITX NAS system (of 
course I have backups of everything) however, my point is to try to see 
if one disk goes down if the ZPOOL will still be able to function 
without the additional disk! - as commands such as remove and detach are 
unavailable in this mode......


Regards,


Kaya