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linux - Samsung 850 EVO + HP P410 limited iops?

I´m experiencing a weird write iops limitation with a HP
P410 256mb cache controller and 4x consumer grade ssd´s (Samsung EVO 850) in RAID5/10.
After upgrade to latest firmware (6.64) for HP P410 controller, it continues with
problems.




Iostat
output:



Device: rrqm/s wrqm/s r/s
            w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
sda 0.00
            0.00 1.00 158.00 36.00 15631.00 197.07 12.16 75.84 6.00 76.28 6.30
            100.10

158 writes/s and 100 %
            util.


My hpacucli
output:




=> ctrl all
            show config detail

Smart Array P410 in Slot 2
 Bus
            Interface: PCI
 Slot: 2
 Serial Number: PACCR9SYLZ34

            Cache Serial Number: PACCQ9SYP5CK
 RAID 6 (ADG) Status: Disabled

            Controller Status: OK

 Hardware Revision: C
 Firmware
            Version: 6.62
 Rebuild Priority: Medium
 Expand Priority:
            Medium
 Surface Scan Delay: 15 secs
 Surface Scan Mode:
            Idle
 Queue Depth: Automatic
 Monitor and Performance Delay: 60
            min
 Elevator Sort: Enabled
 Degraded Performance Optimization:
            Disabled

 Inconsistency Repair Policy: Disabled
 Wait for
            Cache Room: Disabled
 Surface Analysis Inconsistency Notification:
            Disabled
 Post Prompt Timeout: 0 secs
 Cache Board Present:
            True
 Cache Status: OK
 Cache Ratio: 100% Read / 0% Write

            Drive Write Cache: Disabled
 Total Cache Size: 256 MB
 Total Cache
            Memory Available: 144 MB

 No-Battery Write Cache:
            Disabled
 Battery/Capacitor Count: 0
 SATA NCQ Supported:
            True

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




 Logical Drive: 1

            Size: 698.6 GB
 Fault Tolerance: RAID 5
 Heads: 255

            Sectors Per Track: 32
 Cylinders: 65535
 Strip Size: 256
            KB
 Full Stripe Size: 768 KB

 Status: OK

            Caching: Enabled
 Parity Initialization Status: Initialization
            Failed
 Unique Identifier: 600508B1001C8929D0C6820FB103773E
 Disk
            Name: /dev/sda
 Mount Points: None
 Logical Drive Label:
            A516FD0DPACCR9SYLZ3435C0
 Drive Type: Data

 physicaldrive
            1I:1:1

 Port: 1I
 Box: 1
 Bay: 1

            Status: OK
 Drive Type: Data Drive
 Interface Type: Solid State
            SATA
 Size: 250 GB
 Firmware Revision: EMT01B6Q
 Serial
            Number: S21PNSAG270000F 
 Model: ATA Samsung SSD 850 


            SATA NCQ Capable: True
 SATA NCQ Enabled: True
 Current Temperature
            (C): 30
 Maximum Temperature (C): 70
 SSD Smart Trip Wearout: Not
            Supported
 PHY Count: 1
 PHY Transfer Rate:
            3.0Gbps

 physicaldrive 1I:1:2
 Port:
            1I

 Box: 1
 Bay: 2
 Status: OK
 Drive
            Type: Data Drive
 Interface Type: Solid State SATA
 Size: 250
            GB
 Firmware Revision: EMT01B6Q
 Serial Number: S21PNSAG269993V
            
 Model: ATA Samsung SSD 850 
 SATA NCQ Capable:
            True

 SATA NCQ Enabled: True
 Current Temperature (C):
            32
 Maximum Temperature (C): 70
 SSD Smart Trip Wearout: Not
            Supported
 PHY Count: 1
 PHY Transfer Rate:
            3.0Gbps

 physicaldrive 1I:1:3
 Port: 1I
 Box:
            1

 Bay: 3
 Status: OK
 Drive Type: Data
            Drive
 Interface Type: Solid State SATA
 Size: 250 GB

            Firmware Revision: EMT01B6Q
 Serial Number: S21PNSAG269984Z 
 Model:
            ATA Samsung SSD 850 
 SATA NCQ Capable: True
 SATA NCQ Enabled:
            True

 Current Temperature (C): 31
 Maximum Temperature
            (C): 70
 SSD Smart Trip Wearout: Not Supported
 PHY Count:
            1
 PHY Transfer Rate: 3.0Gbps

 physicaldrive
            1I:1:4
 Port: 1I
 Box: 1
 Bay: 4


            Status: OK
 Drive Type: Data Drive
 Interface Type: Solid State
            SATA
 Size: 250 GB
 Firmware Revision: EMT01B6Q
 Serial
            Number: S21PNSAG269998N 
 Model: ATA Samsung SSD 850 
 SATA NCQ
            Capable: True
 SATA NCQ Enabled: True
 Current Temperature (C):
            31

 Maximum Temperature (C): 70
 SSD Smart Trip Wearout:
            Not Supported
 PHY Count: 1
 PHY Transfer Rate:
            3.0Gbps


 SEP (Vendor ID PMCSIERA, Model SRC 8x6G)
            250
 Device Number: 250
 Firmware Version: RevC
 WWID:
            500143800694906F

 Vendor ID: PMCSIERA
 Model: SRC 8x6G


Someone has
experienced this problem with HP P410?

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