If using a DELL PERL 6/i Integrated, configure each disk as RAID-0:

> mfiutil show config
mfi0 Configuration: 8 arrays, 8 volumes, 1 spares
    array 0 of 2 drives:
        drive  1 ( 1863G) ONLINE <ST2000DM006-2DM1 CC26 serial=Z4Z8BX6V> SATA
        drive  6 ( 1863G) ONLINE <ST2000DM006-2DM1 CC26 serial=Z4Z8BY35> SATA
    array 1 of 1 drives:
        drive  0 (  466G) ONLINE <SEAGATE ST500NM0001 PS07 serial=Z1M17ZJ0> SCSI-6
    array 2 of 1 drives:
        drive  2 (  466G) ONLINE <SEAGATE ST500NM0001 0002 serial=Z1M0DAVE> SCSI-6
    array 3 of 1 drives:
        drive  3 (  932G) ONLINE <SEAGATE ST1000NM0023 0004 serial=Z1W54HJV> SCSI-6
    array 4 of 1 drives:
        drive  4 (  466G) ONLINE <SEAGATE ST3500620SS MS04 serial=9QM5L94N> SAS
    array 5 of 1 drives:
        drive  5 (  466G) ONLINE <SEAGATE ST3500620SS MS04 serial=9QM5L9C4> SAS
    array 6 of 1 drives:
        drive  8 (  466G) ONLINE <SEAGATE ST3500620SS MS04 serial=9QM5L8DD> SAS
    array 7 of 1 drives:
        drive  9 (  466G) ONLINE <SEAGATE ST3500620SS MS04 serial=9QM5L824> SAS
    volume mfid0 (1863G) RAID-1 64K OPTIMAL <raid1> spans:
        array 0
    volume mfid1 (465G) RAID-0 64K OPTIMAL <r0> spans:
        array 1
    volume mfid2 (465G) RAID-0 64K OPTIMAL <r2> spans:
        array 2
    volume mfid3 (931G) RAID-0 64K OPTIMAL <r3> spans:
        array 3
    volume mfid4 (465G) RAID-0 64K OPTIMAL <r4> spans:
        array 4
    volume mfid5 (465G) RAID-0 64K OPTIMAL <r5> spans:
        array 5
    volume mfid6 (465G) RAID-0 64K OPTIMAL <r8> spans:
        array 6
    volume mfid7 (465G) RAID-0 64K OPTIMAL <r9> spans:
        array 7
    dedicated spare  7 ( 1863G) HOT SPARE <ST2000DM006-2DM1 CC26 serial=Z4Z8BPTG> SATA backs:
        array 0

Array has one RAID-1 using 3 disks and the others are disk are each one a RAID-0 volume

> mfiutil show volumes
mfi0 Volumes:
  Id     Size    Level   Stripe  State   Cache   Name
 mfid0 ( 1863G) RAID-1      64K OPTIMAL Disabled <raid1>
 mfid1 (  465G) RAID-0      64K OPTIMAL Disabled <r0>
 mfid2 (  465G) RAID-0      64K OPTIMAL Disabled <r2>
 mfid3 (  931G) RAID-0      64K OPTIMAL Disabled <r3>
 mfid4 (  465G) RAID-0      64K OPTIMAL Disabled <r4>
 mfid5 (  465G) RAID-0      64K OPTIMAL Disabled <r5>
 mfid6 (  465G) RAID-0      64K OPTIMAL Disabled <r8>
 mfid7 (  465G) RAID-0      64K OPTIMAL Disabled <r9>

To configure the raid:

zpool create -f <pool-name> raidz2 mfid1 mfid2 mfid3 mfid4 mfid5 mfid6

Add a spare:

zpool add  <pool-name> spare mfid7

This is the output of zpool status:

> zpool status
  pool: sas
 state: ONLINE
  scan: none requested
config:

        NAME        STATE
        sas         ONLINE
          raidz2-0  ONLINE
            mfid1   ONLINE
            mfid2   ONLINE
            mfid3   ONLINE
            mfid4   ONLINE
            mfid5   ONLINE
            mfid6   ONLINE
        spares
          mfid7     AVAIL

errors: No known data errors

In this case the pool named sas is a mix of SAS, SCSI of different sizes:

> mfiutil show drives
mfi0 Physical Drives:
 0 (  466G) ONLINE    <SEAGATE ST500NM0001 PS07 serial=Z1M17ZJ0> SCSI-6 E1:S0
 1 ( 1863G) ONLINE    <ST2000DM006-2DM1 CC26 serial=Z4Z8BX6V> SATA E1:S1
 2 (  466G) ONLINE    <SEAGATE ST500NM0001 0002 serial=Z1M0DAVE> SCSI-6 E1:S2
 3 (  932G) ONLINE    <SEAGATE ST1000NM0023 0004 serial=Z1W54HJV> SCSI-6 E1:S3
 4 (  466G) ONLINE    <SEAGATE ST3500620SS MS04 serial=9QM5L94N> SAS E1:S4
 5 (  466G) ONLINE    <SEAGATE ST3500620SS MS04 serial=9QM5L9C4> SAS E1:S5
 6 ( 1863G) ONLINE    <ST2000DM006-2DM1 CC26 serial=Z4Z8BY35> SATA E1:S6
 7 ( 1863G) HOT SPARE <ST2000DM006-2DM1 CC26 serial=Z4Z8BPTG> SATA E1:S7
 8 (  466G) ONLINE    <SEAGATE ST3500620SS MS04 serial=9QM5L8DD> SAS E1:S8
 9 (  466G) ONLINE    <SEAGATE ST3500620SS MS04 serial=9QM5L824> SAS E1:S9

Enable cache on all disks:

i=0; while [ $i -le 9 ]; do mfiutil cache mfid${i} enable; i=`expr $i + 1`; done