== simple mkfs/restore/mount
committed_seq     1120
total_meta_blocks 163840
total_data_blocks 15728640
   1440    1440   57120
     80      80     400
0: offset: 0 length: 1 flags: O.L
extents: 1
0: offset: 0 length: 1 flags: O.L
extents: 1
0: offset: 0 length: 1 flags: O.L
extents: 1
0: offset: 0 length: 1 flags: O.L
extents: 1
    Type  Size     Total   Used      Free  Use%  
MetaData  64KB    163840  34722    129118    21  
    Data   4KB  15728640     64  15728576     0  
  7 13,L,- 15,L,- 17,L,- I 33 -
== just under ENOSPC
    Type  Size     Total    Used      Free  Use%  
MetaData  64KB    163840  155666      8174    95  
    Data   4KB  15728640      64  15728576     0  
== just over ENOSPC
== ENOSPC
== attempt to restore data device
== attempt format_v1 restore
== test if previously mounted
== cleanup