What is the meaning of the disk status in the 3000 array shows as FORCLONE

sccli> show disks

ch           Id         Size      Speed     LD        Status    IDs                                                 Rev
----------------------------------------------------------------------------------------------------------------
0              0  68.37GB      320MB    ld0       ONLINE    FIJITSU MAW3073NCSUN72G     1703
s/n: 000626BOF1AH
0              1  68.37GB      320MB    ld0       ONLINE    FIJITSU MAW3073NCSUN72G     1703
s/n: 000626BOF2ET
0              2  68.37GB      320MB    ld0       ONLINE    FIJITSU MAW3073NCSUN72G     1703
s/n: 000626BOF16S
0              3  68.37GB      320MB    ld0       ONLINE    FIJITSU MAW3073NCSUN72G     1703
s/n: 000626BOF1DA
0              4  68.37GB      320MB    ld0   FORCLONE   FIJITSU MAW3073NCSUN72G     1703  ---->
s/n: 000626BOF180


sccli> show LD

LD      LD-ID       Size           Assigned     Type    Disks  Spare   Failed  Status
-----------------------------------------------------------------------------------------------
ld0     380fa649   204.35gb  primary        raid5   4        1         0         Good
                                  write-policy default                stripeSize 128kb

In the firmware menu event log, you might see something like