7 Replies Latest reply on May 9, 2016 8:51 PM by Observer

    Parity errors without media errors on RAID1

    Observer

      Hello

       

      I have several HP EliteDesk 800 G1 SFF with RAID1 on Server Express Chipset SATA RAID Controller (Intel Q87 Express, PCI\VEN_8086&DEV_2822&SUBSYS_1998103C&REV_04).

      Periodically (1 every 2-3 days) I run "Verification and Repair" and every time I got "Parity errors" ("Parity errors:  41" in example).

      After repairing I run Verification and Repair againg.

      And again I got several "Parity errors".

      This errors appears on any worstation with Intel SATA RAID.

      Their appearance does not depend on the settings RAID controller and RAID volume in Windows - "Write back", "Flush buffers", etc.

      Their appearance does not depend on RST and drivers version.

      Blocks with media errors:0

      Archive created between checks not contain errors, size of archive - approximately 100 Gbytes.

       

      I try this solution and disable Windows write-cache buffer flushing and set the Intel RST program to cache mode: write back.

      Intel RST 12.5 Repeats Verification & Repairing RAID 5

      I check again and again got errors.

       

      What are these errors?

      Why do they appear?

      As the controller corrects them?

      Why, if any is not broken integrity of the archives?

      How to avoid the error?

       

      Example report:

      ---------

      Volume -hidden-: Verification and repair complete.

       

      System Report

       

      System Information

      OS name:  Microsoft Windows 7 Professional OS version: 6.1.7601 Service Pack 1 7601 System name:  -hidden- System manufacturer:  Hewlett-Packard System model:  HP EliteDesk 800 G1 SFF

      Processor: GenuineIntel Intel64 Family 6 Model 60 Stepping 3 3.401  GHz

      BIOS: Hewlett-Packard, L01 v02.65

       

      Intel® Rapid Storage Technology enterprise Information Kit installed:  13.2.0.1016 User interface version:  13.2.0.1016

      Language:  English (United States)

      RAID option ROM version: 12.5.0.1815

      Driver version: 13.2.0.1016

      ISDI version: 13.2.0.1016

       

      Storage System Information

      RAID Configuration

       

      Array Name: SATA_Array_0000

      Size:  3,815,457 MB

      Available space: 2,048,033 MB

      Number of volumes: 1

      Volume member: -hidden-

      Number of array disks: 2

      Array disk: W7200ZAR

      Array disk: W7201AH6

      Disk data cache: Disabled

       

      Volume name: -hidden-

      Status:  Normal

      Type:  RAID 1

      Size:  883,712 MB

      System volume:  Yes

      Data stripe size: 64 KB

      Write-back cache: Off

      Initialized:  Yes

      Parity errors:  41

      Blocks with media errors: 0

      Physical sector size: 4096 Bytes

      Logical sector size: 512 Bytes

       

      Hardware Information

       

      Controller name: Intel(R) Desktop/Workstation/Server Express Chipset SATA RAID Controller

      Type:  SATA

      Mode:  RAID

      Number of SATA ports: 3

      Number of volumes: 1

      Volume: -hidden-

      Number of spares: 0

      Number of available disks:  0

      Rebuild on Hot Plug: Disabled

      Manufacturer: 32902

      Model number: 10274

      Product revision: 4

      Direct attached disk: W7200ZAR

      Direct attached disk: W7201AH6

       

      Disk on Controller 0, Port 0

      Status:  Normal

      Type:  SATA disk

      Location type: Internal

      Usage:  Array disk

      Size:  1,863 GB

      System disk:  No

      Disk data cache: Disabled

      Command queuing: NCQ

      Transfer rate: 6 Gb/s

      Model: ST2000VN000-1HJ164

      Serial number: W7200ZAR

      SCSI device ID:  0

      Firmware: SC60  

      Physical sector size: 4096 Bytes

      Logical sector size: 512 Bytes

       

      Disk on Controller 0, Port 1

      Status:  Normal

      Type:  SATA disk

      Location type: Internal

      Usage:  Array disk

      Size:  1,863 GB

      System disk:  No

      Disk data cache: Disabled

      Command queuing: NCQ

      Transfer rate: 6 Gb/s

      Model: ST2000VN000-1HJ164

      Serial number: W7201AH6

      SCSI device ID:  1

      Firmware: SC60  

      Physical sector size: 4096 Bytes

      Logical sector size: 512 Bytes

       

      ATAPI device on Controller 0, Port 2

      Location type: Internal

      Transfer rate: 1.5 Gb/s

      Model:  hp      DVD A DS8ABSH                

      Serial number: 466412924713

      Firmware: AHS6