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Samsung 840/840 Evo - Leistungsprobleme & Fix

lalaker 24.09.2014 - 13:18 24074 195 Thread rating
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Viper780

Er ist tot, Jim!
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Registered: Mar 2001
Location: Wien
Posts: 39972
Im NAS hab ich auch noch eine 840 EVO und die ist erstaunlich langsam

Code:
nas: viper780# dd if=/dev/ada4 of=/dev/null bs=2M status=progress
  250003587072 bytes (250 GB, 233 GiB) transferred 2742.043s, 91 MB/s
119237+1 records in
119237+1 records out
250059350016 bytes transferred in 2742.636552 secs (91174804 bytes/sec)

Sogar die HDD schafft 160MB/s (sind ältere 4TB Deskstar NAS - HGST HDN726040ALE614)

Code:
nas: viper780# uname -a
FreeBSD nas.home 12.1-RELEASE-p3 FreeBSD 12.1-RELEASE-p3 #0 r360028M: Fri Apr 17 01:52:46 CEST 2020     [email]root@dev.zoon[/email]01@xigmanas.com:/usr/obj/xigmanas/usr/src/amd64.amd64/sys/XIGMANAS-amd64  amd64


nas: viper780# diskinfo -cit /dev/ada4
/dev/ada4
        512             # sectorsize
        250059350016    # mediasize in bytes (233G)
        488397168       # mediasize in sectors
        4096            # stripesize
        0               # stripeoffset
        484521          # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        Samsung SSD 840 EVO 250GB       # Disk descr.
        S1DBNSAF14***** # Disk ident.
        Yes             # TRIM/UNMAP support
        0               # Rotation rate in RPM
        Not_Zoned       # Zone Mode

I/O command overhead:
        time to read 10MB block      0.064010 sec       =    0.003 msec/sector
        time to read 20480 sectors   3.995558 sec       =    0.195 msec/sector
        calculated command overhead                     =    0.192 msec/sector

Seek times:
        Full stroke:      250 iter in   0.042664 sec =    0.171 msec
        Half stroke:      250 iter in   0.028297 sec =    0.113 msec
        Quarter stroke:   500 iter in   0.065239 sec =    0.130 msec
        Short forward:    400 iter in   0.032134 sec =    0.080 msec
        Short backward:   400 iter in   0.040717 sec =    0.102 msec
        Seq outer:       2048 iter in   0.167840 sec =    0.082 msec
        Seq inner:       2048 iter in   0.098174 sec =    0.048 msec

Transfer rates:
        outside:       102400 kbytes in   0.247193 sec =   414251 kbytes/sec
        middle:        102400 kbytes in   0.285989 sec =   358056 kbytes/sec
        inside:        102400 kbytes in   0.248759 sec =   411643 kbytes/sec

Asynchronous random reads:
        sectorsize:    351131 ops in    3.000987 sec =   117005 IOPS
        4 kbytes:      277911 ops in    3.001260 sec =    92598 IOPS
        32 kbytes:      47536 ops in    3.007692 sec =    15805 IOPS
        128 kbytes:     12478 ops in    3.029885 sec =     4118 IOPS



nas: viper780# smartctl -iaxHcA /dev/ada4
smartctl 7.1 2019-12-30 r5022 [FreeBSD 12.1-RELEASE-p3 amd64] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, [url]www.smartmontools.org[/url]

=== START OF INFORMATION SECTION ===
Model Family:     Samsung based SSDs
Device Model:     Samsung SSD 840 EVO 250GB
Serial Number:    S1DBNSAF14*****
LU WWN Device Id: 5 002538 8a01b8b0f
Firmware Version: EXT0DB6Q
User Capacity:    250,059,350,016 bytes [250 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 4c
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Wed May  6 15:49:41 2020 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
AAM feature is:   Unavailable
APM feature is:   Unavailable
Rd look-ahead is: Enabled
Write cache is:   Enabled
DSN feature is:   Unavailable
ATA Security is:  Disabled, frozen [SEC2]
Unexpected SCT status 0x0001 (action_code=4, function_code=2)
Wt Cache Reorder: Unknown (SCT Feature Control command failed)

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x05) Offline data collection activity
                                        was aborted by an interrupting command from host.
                                        Auto Offline Data Collection: Disabled.
Self-test execution status:      (   0) The previous self-test routine completed
                                        without error or no self-test has ever
                                        been run.
Total time to complete Offline
data collection:                ( 4800) seconds.
Offline data collection
capabilities:                    (0x53) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        No Offline surface scan supported.
                                        Self-test supported.
                                        No Conveyance Self-test supported.
                                        Selective Self-test supported.
SMART capabilities:            (0x0003) Saves SMART data before entering
                                        power-saving mode.
                                        Supports SMART auto save timer.
Error logging capability:        (0x01) Error logging supported.
                                        General Purpose Logging supported.
Short self-test routine
recommended polling time:        (   2) minutes.
Extended self-test routine
recommended polling time:        (  80) minutes.
SCT capabilities:              (0x003d) SCT Status supported.
                                        SCT Error Recovery Control supported.
                                        SCT Feature Control supported.
                                        SCT Data Table supported.

SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  5 Reallocated_Sector_Ct   PO--CK   100   100   010    -    0
  9 Power_On_Hours          -O--CK   094   094   000    -    25441
 12 Power_Cycle_Count       -O--CK   099   099   000    -    832
177 Wear_Leveling_Count     PO--C-   093   093   000    -    76
179 Used_Rsvd_Blk_Cnt_Tot   PO--C-   100   100   010    -    0
181 Program_Fail_Cnt_Total  -O--CK   100   100   010    -    0
182 Erase_Fail_Count_Total  -O--CK   100   100   010    -    0
183 Runtime_Bad_Block       PO--C-   100   100   010    -    0
187 Uncorrectable_Error_Cnt -O--CK   100   100   000    -    0
190 Airflow_Temperature_Cel -O--CK   066   055   000    -    34
195 ECC_Error_Rate          -O-RC-   200   200   000    -    0
199 CRC_Error_Count         -OSRCK   099   099   000    -    53
235 POR_Recovery_Count      -O--C-   099   099   000    -    375
241 Total_LBAs_Written      -O--CK   099   099   000    -    42409975091
                            ||||||_ K auto-keep
                            |||||__ C event count
                            ||||___ R error rate
                            |||____ S speed/performance
                            ||_____ O updated online
                            |______ P prefailure warning

General Purpose Log Directory Version 1
SMART           Log Directory Version 1 [multi-sector log support]
Address    Access  R/W   Size  Description
0x00       GPL,SL  R/O      1  Log Directory
0x01           SL  R/O      1  Summary SMART error log
0x02           SL  R/O      1  Comprehensive SMART error log
0x03       GPL     R/O      1  Ext. Comprehensive SMART error log
0x06           SL  R/O      1  SMART self-test log
0x07       GPL     R/O      1  Extended self-test log
0x09           SL  R/W      1  Selective self-test log
0x10       GPL     R/O      1  NCQ Command Error log
0x11       GPL     R/O      1  SATA Phy Event Counters log
0x13       GPL     R/O      1  SATA NCQ Send and Receive log
0x30       GPL,SL  R/O      9  IDENTIFY DEVICE data log
0x80-0x9f  GPL,SL  R/W     16  Host vendor specific log
0xa1       GPL,SL  VS      16  Device vendor specific log
0xce       GPL,SL  VS      16  Device vendor specific log
0xde           SL  VS       1  Device vendor specific log
0xe0       GPL,SL  R/W      1  SCT Command/Status
0xe1       GPL,SL  R/W      1  SCT Data Transfer

SMART Extended Comprehensive Error Log Version: 1 (1 sectors)
No Errors Logged

SMART Error Log Version: 1
No Errors Logged

SCT Status Version:                  3
SCT Version (vendor specific):       1 (0x0001)
Device State:                        SMART Off-line Data Collection executing in background (4)
Current Temperature:                    34 Celsius

SCT Error Recovery Control:
           Read: Disabled
          Write: Disabled

Device Statistics (GP/SMART Log 0x04) not supported

Pending Defects log (GP Log 0x0c) not supported
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