An aggregate is composed of twelve 36-Gigabyte disks. A drive fails and only 72-Gigabyte spare
disks are available. Data ONTAP will then perform what action.

A.
Chooses a 72-Gigabyte disk and use it as is.

B.
Chooses a 72-Gigabyte disk and right-size it.

C.
Halts after 24 hour of running in degraded mode.

D.
Alerts you that there are no 36-Gigabyte disks and wait for one to be inserted.

Explanation:
https://library.netapp.com/ecmdocs/ECMP1196986/html/GUID-8A91F6A2-61B8-42C3-

AEAB7D5AA9BBE9CF.html
If a disk fails and no hot spare disk that exactly matches the failed disk is available, Data ONTAP
uses the bestavailable spare. Understanding how Data ONTAP chooses an appropriate spare
when there is no matchingspare enables you to optimize your spare allocation for your
environment.
Data ONTAP picks a non-matching hot spare based on the following criteria (and more; in the link
above):
If the available hot spares are not the correct size, Data ONTAP uses one that is the next size up,
ifthere is one.
The replacement disk is downsized (aka right sized) to match the size of the disk it is replacing;
theextra capacity is not available.