ZFS Some doubt about documentation

C

circus78

Hi,
according to official documentation (https://www.freebsd.org/doc/handbook/zfs-zpool.html):

Code: 
"After the pool has been created, most vdev types do not allow additional disks to be added to the vdev. The exceptions are mirrors, which allow additional disks to be added to the vdev, and stripes, which can be upgraded to mirrors by attaching an additional disk to the vdev"

I don't see "stripe" in vdev-types (https://www.freebsd.org/doc/handbook/zfs-term.html#zfs-term-vdev), should I assume that "single disk = stripe"?


Again:

Code: 
"Currently, vdevs cannot be removed from a pool, and disks can only be removed from a mirror if there is enough remaining redundancy. If only one disk in a mirror group remains, it ceases to be a mirror and reverts to being a stripe, risking the entire pool if that remaining disk fails."

Let's say I have 4 x 1 TB hard disk, mirror, I get 1 TB total space.
If I loose 3 hard disk, vdev "changes" type (from mirror to stripe) or simply become a degraded mirror?

Thank you
 
circus78 said:
Let's say I have 4 x 1 TB hard disk, mirror, I get 1 TB total space.
If I loose 3 hard disk, vdev "changes" type (from mirror to stripe) or simply become a degraded mirror?
Click to expand...
It will become a degraded mirror.
 
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