13 drives

What's the best setup for 13 drives? I don't need high performance (this will be mostly for archiving media), but very much do not want to lose my data. The drives are 18TB, and ZFS will be used exclusively.

Name	Setup	Availability	Tolerance	Max Rebuild	Perf
raid3z	10 data, 3 parity	76.9% (10)	3	100% + fail
raid3z + HS	9 data, 3 parity, 1 spare	69.2% (9)	3	92.3%
raid2z	11 data, 2 parity	84.6% (11)	2	84.6% + fail
raid2z + HS	10 data, 2 parity, 1 spare	76.9% (10)	2	76.9%
striped raid2z + HS	2x(4 data, 2 parity), 1 spare	61.5% (8)	2 + 2	30.8%
striped raidz + HS	2x(5 data, 1 parity), 1 spare	76.9% (10)	1 + 1	46.2%
striped raidz + HS	4x(2 data, 1 parity), 1 spare	61.5% (8)	1 + 1 + 1 + 1	25%
mirrored raid2z + HS	2x(4 data, 2 parity), 1 spare	30.8% (4)	6 + 2	46.2%
mirrored raidz + HS	2x(5 data, 1 parity), 1 spare	38.5% (5)	6 + 1	46.2%

14 disks

14 disks might be more attractive. I only list solutions without a hot spare.

Name	Setup	Availability	Tolerance	Max Rebuild	Perf
raid3z	11 data, 3 parity	78.6% (11)	3	100% + fail
raid2z	12 data, 2 parity	85.7% (12)	2	85.7% + fail
striped raid3z	2x(4 data, 3 parity)	57.1% (8)	3 + 3	50% + fail
striped raid2z	2x(5 data, 2 parity)	71.4% (10)	2 + 2	50% + fail
striped raidz	2x(6 data, 1 parity)	85.7% (12)	1 + 1	50% + fail
mirrored raid3z	2x(4 data, 3 parity)	28.6% (4)	50% + fail
mirrored raid2z	2x(5 data, 2 parity)	35.7% (5)	7 + 2	50% + fail
mirrored raidz	2x(6 data, 1 parity)	42.9% (6)	7 + 1	50%