It only ran for a couple seconds, this was the output:
/vmfs/volumes/4ed6788c-87fd085e-2102-782bcb544683/jag-lic # vmkfstools -v 0 -t 0 jag-lic.vmdk
DISKLIB-VMFS : "./jag-lic-flat.vmdk" : open successful (14) size = 42949672960, hd = 111480549. Type 3
DISKLIB-DSCPTR: Opened [0]: "jag-lic-flat.vmdk" (0xe)
DISKLIB-LINK : Opened 'jag-lic.vmdk' (0xe): vmfs, 83886080 sectors / 40 GB.
DISKLIB-LIB : Resuming change tracking.
DISKLIB-LIB : Opened "jag-lic.vmdk" (flags 0xe, type vmfs).
Mapping for file jag-lic.vmdk (42949672960 bytes in size):
[ 0: 23068672] --> [VMFS -- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 376647450624 --> 376670519296)]
[ 23068672: 5242880] --> [VMFS Z- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 376670519296 --> 376675762176)]
[ 28311552: 3145728] --> [VMFS Z- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 376676810752 --> 376679956480)]
[ 31457280: 5242880] --> [VMFS -- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 376679956480 --> 376685199360)]
[ 36700160: 9437184] --> [VMFS Z- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 376685199360 --> 376694636544)]
[ 46137344: 58720256] --> [VMFS Z- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 1289955049472 --> 1290013769728)]
[ 104857600: 12050235392] --> [VMFS -- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 1290013769728 --> 1302064005120)]
[ 12155092992: 26214400] --> [VMFS Z- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 1302064005120 --> 1302090219520)]
[ 12181307392: 13619953664] --> [VMFS -- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 1302090219520 --> 1315710173184)]
[ 25801261056: 17146314752] --> [VMFS Z- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 1315710173184 --> 1332856487936)]
[ 42947575808: 1048576] --> [VMFS -- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 1332856487936 --> 1332857536512)]
[ 42948624384: 1048576] --> [VMFS Z- LVID:4ed6788a-32b093d0-d527-782bcb54468 3/4ed6788a-070e711e-ea04-782bcb544683/1:( 1332857536512 --> 1332858585088)]
DISKLIB-VMFS : "./jag-lic-flat.vmdk" : closed.
AIOMGR-U : stat o=1 r=0 w=0 i=13 br=0 bw=0
AIOMGR-S : stat o=1 r=3 w=0 i=0 br=49152 bw=0