MD3000 Drive detected errors is increasing

Hi,
we are using md3000 with sas connection.
since some days, we are facing big performance issues.
the system is running with 15 drives:
      TRAY, SLOT STATUS   CAPACITY    TYPE CURRENT DATA RATE PRODUCT ID                                FIRMWARE VERSION
      0, 1        Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 2        Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 3        Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 4        Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 5        Failed   931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 6        Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 7        Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 8        Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 9        Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 10       Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 11       Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 12       Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 13       Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 14       Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
      0, 15       Optimal 931.513 GB SATA 3 Gbps             Hitachi HUA722010CLA330                   JP4OA3JH
here the information on disk 5:
Drive at Enclosure 0, Slot 5
   Status:                  Failed
   Mode:                    Assigned
   Raw capacity:            931.513 GB
   Usable capacity:         931.013 GB
   World-wide identifier:   50:00:cc:a3:9a:c7:9f:50:00:00:00:00:00:00:00:00
   Associated array:        md3000g0
   Drive path redundancy: Lost
   Drive type:             Serial ATA (SATA)
   Speed:                  7,200 RPM
   Current data rate:      3 Gbps
   Product ID:             Hitachi HUA722010CLA330
   Package version:        JP4OA3JH
   Firmware version:       JP4OA3JH
   Serial number:          JPW9P0N00JSU2D
   Vendor:                 Not Available
   Date of manufacture:    Not Available
it is already replaced by hotspare disk 13 and the array is in optimal status.
but the error counter is still increasing:
DRIVE CHANNELS----------------------------
   SUMMARY
      CHANNEL PORT       STATUS
      1        Expansion Optimal
      2        Expansion Optimal
   DETAILS
      DRIVE CHANNEL 1
         Port: Expansion
            Status: Optimal
            Max. Rate: 3 Gbps
            Current Rate: 3 Gbps
            Rate Control: Switched
            DRIVE COUNTS
               Total # of attached drives: 15
               Connected to: A
                  Attached drives: 15
                     Drive enclosure: 0 (15 drives)
            CUMULATIVE ERROR COUNTS
               Controller A
                  Baseline time set:               4/2/15 9:15:42 AM
                  Sample period (days, hh:mm:ss): 33 days, 03:07:36
                  Controller detected errors:      9
                  Drive detected errors:           3640802
                  Timeout errors:                  0
                  Total I/O count:                 31288381
               Controller B
                  Baseline time set:               4/2/15 9:15:42 AM
                  Sample period (days, hh:mm:ss): 33 days, 03:01:02
                  Controller detected errors:      8
                  Drive detected errors:           3512795
                  Timeout errors:                  0
                  Total I/O count:                 754965630
         DRIVE CHANNEL 2
            Port: Expansion
               Status: Optimal
               Max. Rate: 3 Gbps
               Current Rate: 3 Gbps
               Rate Control: Switched
               DRIVE COUNTS
                  Total # of attached drives: 15
                  Connected to: B
                     Attached drives: 15
                        Drive enclosure: 0 (15 drives)
               CUMULATIVE ERROR COUNTS
                  Controller A
                     Baseline time set:               4/2/15 9:15:42 AM
                     Sample period (days, hh:mm:ss): 33 days, 03:07:36
                     Controller detected errors:      0
                     Drive detected errors:           0
                     Timeout errors:                  0
                     Total I/O count:                 5708758
                  Controller B
                     Baseline time set:               4/2/15 9:15:42 AM
                     Sample period (days, hh:mm:ss): 33 days, 03:01:02
                     Controller detected errors:      0
                     Drive detected errors:           0
                     Timeout errors:                  0
                     Total I/O count:                 247629779
do i have to "unassign" the disk 5 or how to find out, where these "Drive detected errors" come from?
thanks.
patrick

Somya, check your parameters:
1 * Last added file name (lastfile) ....... [I:\ORACLE\SMD\SAPDATA2\SR3_11\SR3.
DATA11]
2 * Last added file size in MB (lastsize) . [420]
3 - New file to be added (file) ........... [I:\oracle\SMD\sapdata2\sr3_12\sr3.
data12]
4 # Raw disk / link target (rawlink) ...... []
5 - Size of the new file in MB (size) ..... [420]
6 - File autoextend mode (autoextend) ..... [yes]
7 - Maximum file size in MB (maxsize) ..... [10000]
8 - File increment size in MB (incrsize) .. [20]
option 2: your datafile will use 420MB to begin with.
option 7: it can grow up to 10000MB
option 8: it will grow with increments of 20MB
so, you need at least 10GB in your filesystem.
your warnings are saying that datafiles of 3 tablespaces, if they grow to their maximum file size, will overflow your filesystem (PSAPSR3,PSAPSR3700,PSAPSR3DB).
solutions:
1. increase filesystem size
2. decrease value of maximum size of datafiles, I would especially check the maximum size of ALL datafiles of PSAPSR3.
3. move some datafiles on another filesystem.
good luck.

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How to Distinguish a Physical Disk Device from an Event Message
http://support.microsoft.com/kb/159865
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