Re: An error occurred while consolidating disks: 5 (Input/output error).

Just try to do the following:

[root@esx1:/vmfs/volumes/56d97ec1-2b6018d1-5468-b82a72d2f472/1] vmkfstools -t0 DISK-000001.vmdk

Failed to open virtual disk: Input/output error 327689

[root@esx1:/vmfs/volumes/56d97ec1-2b6018d1-5468-b82a72d2f472/1] vmkfstools -i DISK-000001.vmdk DISK-clone.vmdk

Failed to open 'DISK-000001.vmdk': Input/output error (327689).

[root@esx1:/vmfs/volumes/56d97ec1-2b6018d1-5468-b82a72d2f472/1] cat DISK-000001.vmdk

# Disk DescriptorFile

version=1

encoding="UTF-8"

CID=20f463a7

parentCID=89cccd46

isNativeSnapshot="no"

createType="vmfsSparse"

parentFileNameHint="DISK.vmdk"

# Extent description

RW 83886080 VMFSSPARSE "DISK-000001-delta.vmdk"

# The Disk Data Base

#DDB

[root@esx1:/vmfs/volumes/56d97ec1-2b6018d1-5468-b82a72d2f472/1] cat DISK.vmdk

# Disk DescriptorFile

version=1

encoding="UTF-8"

CID=89cccd46

parentCID=ffffffff

isNativeSnapshot="no"

createType="vmfs"

# Extent description

RW 83886080 VMFS "DISK-flat.vmdk"

# The Disk Data Base

#DDB

ddb.adapterType = "lsilogic"

ddb.deletable = "true"

ddb.geometry.cylinders = "5221"

ddb.geometry.heads = "255"

ddb.geometry.sectors = "63"

ddb.longContentID = "c2b1d91676ac94a3c7b2d88e89cccd46"

ddb.toolsVersion = "9537"

ddb.uuid = "60 00 C2 94 e1 10 9b 43-c2 71 bf 48 64 bc 69 97"