Should DB_RECOVERY_FILE_DEST_SIZE be smaller than the respective partition size? Is it OK to set the DB_RECOVERY_FILE_DEST_SIZE to be equal to a drive partition that is dedicated for this purpose?

That is, if I use a partition of 10GB, is it ok to set the DB_RECOVERY_FILE_DEST_SIZE to be equal to 10GB?

Or is there a chance that errors will occur due to insufficient space in the drive, and I should use a smaller value?

Edit (more details):

My setup has the following parameters:

db_recovery_file_dest            string  /oracle/fra
db_recovery_file_dest_size       big integer 10G
10 GB as 10240 MiB?

10 GB as 10000 MB?

Is it 10 GB because of the rounding, but the actual size is 10227 MiB? Or 10213 MiB?

Setting db_recovery_file_dest_size to 10G means the size of FRA will be 10*1024*1024*1024 = 10737418240 bytes. As long as that is less than or equal to the available space in the filesystem (not partition!), it should be fine.

I usually set db_recovery_file_dest_size a bit smaller than the amount of free space in the filesystem or ASM diskgroup if I get a dedicated filesystem or diskgroup for it.