Hot spare disk problem on SRCSASRB

Here it is:

(And: I have never had a hot spare disk installed on the system.)

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System Report

System Information
OS name:  Microsoft Windows 7 Home Premium
OS version:  6.1.7601 Service Pack 1 7601
System name:  ARNE-PC
System manufacturer:  System manufacturer
System model:  System Product Name
Processor:  GenuineIntel Intel64 Family 6 Model 23 Stepping 10 3,166  GHz
BIOS:  American Megatrends Inc., 2102  

Intel® Rapid Storage Technology
Kit installed:  10.6.0.1002
User interface version:  10.6.0.1002
Language:  Swedish (Sweden)
Intel RAID controller:  Intel(R) Desktop/Workstation/Server Express Chipset SATA RAID Controller
Number of SATA ports:  6
RAID option ROM version:  8.0.0.1038
Driver version:  10.6.0.1002
ISDI version:  10.6.0.1002

Device Information
Name:  Array_0000
Size:  224 GB
Available space:  0 GB
Disk data cache:  Enabled
Number of volumes:  1
Volume member:  OS
Number of disks:  2
Array disk:  CVPR136601SW120LGN
Array disk:  BTPR136201MM120LGN

Name:  Array_0001
Size:  932 GB
Available space:  0 GB
Disk data cache:  Enabled
Number of volumes:  1
Volume member:  Backup
Number of disks:  2
Array disk:  WD-WCASY6137106
Array disk:  WD-WCASY6089704

Name:  OS
Status:  Normal
Type:  RAID 1
Size:  112 GB
Data stripe size:  64 KB
Write-back cache:  Disabled
System volume:  Yes 
Initialized:  Yes 
Verification errors found:  0
Blocks with media errors:  0
Physical sector size:  512 Bytes
Logical sector size:  512 Bytes
Parent array:  Array_0000
Number of disks:  2
Array disk:  CVPR136601SW120LGN
Array disk:  BTPR136201MM120LGN

Name:  Backup
Status:  Normal
Type:  RAID 1
Size:  466 GB
Data stripe size:  64 KB
Write-back cache:  Disabled
System volume:  No
Initialized:  Yes 
Verification errors found:  0
Blocks with media errors:  0
Physical sector size:  512 Bytes
Logical sector size:  512 Bytes
Parent array:  Array_0001
Number of disks:  2
Array disk:  WD-WCASY6137106
Array disk:  WD-WCASY6089704

Disk on port 0
Port location:  Internal
Status:  Normal
Type:  Solid-state drive
Usage:  Array disk
Size:  112 GB
Serial number:  CVPR136601SW120LGN
Model:  INTEL SSDSA2CW120G3
Firmware:  4PC10362
System disk:  No
Password protected:  No
Disk data cache:  Enabled
Native command queuing:  Yes 
SATA transfer rate:  3 Gb/s
Physical sector size:  512 Bytes
Logical sector size:  512 Bytes

Disk on port 1
Port location:  Internal
Status:  Normal
Type:  Solid-state drive
Usage:  Array disk
Size:  112 GB
Serial number:  BTPR136201MM120LGN
Model:  INTEL SSDSA2CW120G3
Firmware:  4PC10362
System disk:  No
Password protected:  No
Disk data cache:  Enabled
Native command queuing:  Yes 
SATA transfer rate:  3 Gb/s
Physical sector size:  512 Bytes
Logical sector size:  512 Bytes

Disk on port 4
Port location:  Internal
Status:  Normal
Type:  Hard disk
Usage:  Array disk
Size:  466 GB
Serial number:  WD-WCASY6137106
Model:  WDC WD5001AALS-00L3B2
Firmware:  01.03B01
System disk:  No
Password protected:  No
Disk data cache:  Enabled
Native command queuing:  Yes 
SATA transfer rate:  3 Gb/s
Physical sector size:  512 Bytes
Logical sector size:  512 Bytes

Disk on port 5
Port location:  Internal
Status:  Normal
Type:  Hard disk
Usage:  Array disk
Size:  466 GB
Serial number:  WD-WCASY6089704
Model:  WDC WD5001AALS-00L3B2
Firmware:  01.03B01
System disk:  No
Password protected:  No
Disk data cache:  Enabled
Native command queuing:  Yes 
SATA transfer rate:  3 Gb/s
Physical sector size:  512 Bytes
Logical sector size:  512 Bytes

Disk on port 2
Port location:  Internal
Status:  Normal
Type:  Solid-state drive
Usage:  Unknown
Size:  0 GB
Serial number: 
Model:  Optiarc DVD RW AD-7240S
Firmware:  1.04
System disk:  No
Password protected:  No
Disk data cache:  Disabled
Native command queuing:  No
SATA transfer rate:  1.5 Gb/s
Physical sector size:  0 Bytes
Logical sector size:  0 Bytes

Empty port
Port:  3
Port location:  Internal