RAID rebuild will stop after 1-2% and stuck on "Ready for Rebuild"

[isocil]

Hello,

We have an DL180 G5 with Smart Array P400, and with 2 RAID5 arrays on it.

# hpacucli controller slot=6 ld all show

Smart Array P400 in Slot 6

array A

logicaldrive 1 (3.4 TB, RAID 5, Ready for Rebuild)

array B

logicaldrive 2 (199 MB, RAID 5, OK)
logicaldrive 3 (9.1 TB, RAID 5, OK)

we had a failed drive which we replace and that initiate the rebuild for array B,
but now we have array A stuck on "Ready for Rebuild" for few days now.

If i restart the machine, the rebuild process will start again, but will stop after 1-2% of progress.

All the PhysicalDrivers are ok

# hpacucli ctrl slot=6 pd all show status

   physicaldrive 1I:1:1 (port 1I:box 1:bay 1, 750 GB): OK
   physicaldrive 1I:1:2 (port 1I:box 1:bay 2, 1 TB): OK
   physicaldrive 1I:1:3 (port 1I:box 1:bay 3, 1 TB): OK
   physicaldrive 1I:1:4 (port 1I:box 1:bay 4, 1 TB): OK
   physicaldrive 1I:1:5 (port 1I:box 1:bay 5, 750 GB): OK
   physicaldrive 1I:1:6 (port 1I:box 1:bay 6, 750 GB): OK
   physicaldrive 1I:1:7 (port 1I:box 1:bay 7, 2 TB): OK
   physicaldrive 1I:1:8 (port 1I:box 1:bay 8, 2 TB): OK
   physicaldrive 1I:1:9 (port 1I:box 1:bay 9, 2 TB): OK
   physicaldrive 1I:1:10 (port 1I:box 1:bay 10, 2 TB): OK
   physicaldrive 1I:1:11 (port 1I:box 1:bay 11, 2 TB): OK
   physicaldrive 1I:1:12 (port 1I:box 1:bay 12, 2 TB): OK

when runing show config detail I see this message for array A

Parity Initialization Status: Initialization Failed

# hpacucli controller slot=6 show config detail.

Smart Array P400 in Slot 6
   Bus Interface: PCI
   Slot: 6
   Serial Number: P-
   Cache Serial Number: P-
   RAID 6 (ADG) Status: Enabled
   Controller Status: OK
   Hardware Revision: E
   Firmware Version: 7.22
   Rebuild Priority: Medium
   Expand Priority: Medium
   Surface Scan Delay: 1 secs
   Surface Scan Mode: Idle
   Wait for Cache Room: Disabled
   Surface Analysis Inconsistency Notification: Disabled
   Post Prompt Timeout: 0 secs
   Cache Board Present: True
   Cache Status: OK
   Cache Ratio: 25% Read / 75% Write
   Drive Write Cache: Enabled
   Total Cache Size: 256 MB
   Total Cache Memory Available: 208 MB
   No-Battery Write Cache: Disabled
   Cache Backup Power Source: Batteries
   Battery/Capacitor Count: 1
   Battery/Capacitor Status: OK
   SATA NCQ Supported: True

   Array: A
      Interface Type: SATA
      Unused Space: 0  MB
      Status: OK
      Array Type: Data

      Logical Drive: 1
         Size: 3.4 TB
         Fault Tolerance: 5
         Heads: 255
         Sectors Per Track: 32
         Cylinders: 65535
         Strip Size: 64 KB
         Full Stripe Size: 320 KB
         Status: Ready for Rebuild
         Caching:  Enabled
         Parity Initialization Status: Initialization Failed
         Unique Identifier: 600508B100104B39565732304637000D
         Disk Name: /dev/cciss/c0d1
         Mount Points: None
         OS Status: LOCKED
         Logical Drive Label: A06CBE10PAFGL0K9VW20F75A11
         Drive Type: Data

How can i return into a healy state of the RAID ?

Thanks.