Hello,
I'm encountering a drop of write performance after creating a mirror
with two whole disk ( sdc and sdd ) and i'm not able to find where it
come from:
Perf before :
abyss ~ # dd bs=1M count=2024 if=/dev/zero of=/dev/sdd conv=fdatasync
2024+0 records in
2024+0 records out
2122317824 bytes (2,1 GB, 2,0 GiB) copied, 14,1238 s, 150 MB/s
abyss ~ # dd bs=1M count=2024 if=/dev/zero of=/dev/sdc conv=fdatasync
2024+0 records in
2024+0 records out
2122317824 bytes (2,1 GB, 2,0 GiB) copied, 14,7046 s, 144 MB/s
Creating the mirror :
abyss ~ # mdadm --create --verbose /dev/md/md6to --level=1
--raid-devices=2 /dev/sdc /dev/sdd
mdadm: Note: this array has metadata at the start and
may not be suitable as a boot device. If you plan to
store '/boot' on this device please ensure that
your boot-loader understands md/v1.x metadata, or use
--metadata=0.90
mdadm: size set to 5860391488K
mdadm: automatically enabling write-intent bitmap on large array
Continue creating array? y
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md/md6to started.
Perf after :
abyss ~ # dd bs=1M count=2024 if=/dev/zero of=/dev/md/md6to
conv=fdatasync
2024+0 records in
2024+0 records out
2122317824 bytes (2,1 GB, 2,0 GiB) copied, 21,1528 s, 100 MB/s
I've also tried with a mirror created on two partition and the result
was the same.
I tried with a LVM mirror, the drop of performance was not so important
:
abyss ~ # vgcreate data_vg /dev/sdc
Physical volume "/dev/sdc" successfully created.
Volume group "data_vg" successfully created
abyss ~ # vgextend data_vg /dev/sdd
Physical volume "/dev/sdd" successfully created.
Volume group "data_vg" successfully extended
abyss ~ # vgs
VG #PV #LV #SN Attr VSize VFree
data_vg 2 0 0 wz--n- 10,92t 10,92t
abyss ~ # lvcreate -L 50G -m1 -n lv_mirror data_vg
Logical volume "lv_mirror" created.
abyss ~ # dd bs=1M count=2024 if=/dev/zero of=/dev/data_vg/lv_mirror
conv=fdatasync
2024+0 records in
2024+0 records out
2122317824 bytes (2,1 GB, 2,0 GiB) copied, 16,3757 s, 130 MB/s
I didn't notice anything wrong while launching the dd test and watching
top.
Here are the information from asked
https://raid.wiki.kernel.org/index.php/Asking_for_help
abyss lsdrv # smartctl --xall /dev/sdc
smartctl 6.5 2016-05-07 r4318 [x86_64-linux-4.10.2-gentoo] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke,
www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Western Digital Red
Device Model: WDC WD60EFRX-68L0BN1
Serial Number: WD-WX11D76EPFJV
LU WWN Device Id: 5 0014ee 2b88cbb3d
Firmware Version: 82.00A82
User Capacity: 6 001 175 126 016 bytes [6,00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 5700 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2, ACS-3 T13/2161-D revision 3b
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Fri Mar 17 14:41:32 2017 CET
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
ATA Security is: Disabled, frozen [SEC2]
Wt Cache Reorder: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x00) Offline data collection activity
was never started.
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: ( 8144) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection
on/off support.
Suspend Offline collection upon
new
command.
Offline surface scan supported.
Self-test supported.
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: ( 735) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x303d) SCT Status supported.
SCT Error Recovery Control
supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
1 Raw_Read_Error_Rate POSR-K 200 200 051 - 0
3 Spin_Up_Time POS--K 208 208 021 - 8558
4 Start_Stop_Count -O--CK 100 100 000 - 12
5 Reallocated_Sector_Ct PO--CK 200 200 140 - 0
7 Seek_Error_Rate -OSR-K 200 200 000 - 0
9 Power_On_Hours -O--CK 100 100 000 - 274
10 Spin_Retry_Count -O--CK 100 253 000 - 0
11 Calibration_Retry_Count -O--CK 100 253 000 - 0
12 Power_Cycle_Count -O--CK 100 100 000 - 12
192 Power-Off_Retract_Count -O--CK 200 200 000 - 6
193 Load_Cycle_Count -O--CK 200 200 000 - 25
194 Temperature_Celsius -O---K 119 111 000 - 33
196 Reallocated_Event_Count -O--CK 200 200 000 - 0
197 Current_Pending_Sector -O--CK 200 200 000 - 0
198 Offline_Uncorrectable ----CK 100 253 000 - 0
199 UDMA_CRC_Error_Count -O--CK 200 200 000 - 0
200 Multi_Zone_Error_Rate ---R-- 100 253 000 - 0
||||||_ 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 5 Comprehensive SMART error log
0x03 GPL R/O 6 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 SATA NCQ Queued Error log
0x11 GPL R/O 1 SATA Phy Event Counters log
0x21 GPL R/O 1 Write stream error log
0x22 GPL R/O 1 Read stream error log
0x30 GPL,SL R/O 9 IDENTIFY DEVICE data log
0x80-0x9f GPL,SL R/W 16 Host vendor specific log
0xa0-0xa7 GPL,SL VS 16 Device vendor specific log
0xa8-0xb6 GPL,SL VS 1 Device vendor specific log
0xb7 GPL,SL VS 54 Device vendor specific log
0xbd GPL,SL VS 1 Device vendor specific log
0xc0 GPL,SL VS 1 Device vendor specific log
0xc1 GPL VS 93 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 (6 sectors)
No Errors Logged
SMART Extended Self-test Log Version: 1 (1 sectors)
No self-tests have been logged. [To run self-tests, use: smartctl -t]
SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute
delay.
SCT Status Version: 3
SCT Version (vendor specific): 258 (0x0102)
SCT Support Level: 1
Device State: Active (0)
Current Temperature: 33 Celsius
Power Cycle Min/Max Temperature: 32/41 Celsius
Lifetime Min/Max Temperature: 17/41 Celsius
Under/Over Temperature Limit Count: 0/0
Vendor specific:
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
SCT Temperature History Version: 2
Temperature Sampling Period: 1 minute
Temperature Logging Interval: 1 minute
Min/Max recommended Temperature: 0/60 Celsius
Min/Max Temperature Limit: -41/85 Celsius
Temperature History Size (Index): 478 (193)
Index Estimated Time Temperature Celsius
194 2017-03-17 06:44 32 *************
... ..(464 skipped). .. *************
181 2017-03-17 14:29 32 *************
182 2017-03-17 14:30 33 **************
... ..( 10 skipped). .. **************
193 2017-03-17 14:41 33 **************
SCT Error Recovery Control:
Read: 70 (7,0 seconds)
Write: 70 (7,0 seconds)
Device Statistics (GP/SMART Log 0x04) not supported
SATA Phy Event Counters (GP Log 0x11)
ID Size Value Description
0x0001 2 0 Command failed due to ICRC error
0x0002 2 13 R_ERR response for data FIS
0x0003 2 0 R_ERR response for device-to-host data FIS
0x0004 2 13 R_ERR response for host-to-device data FIS
0x0005 2 0 R_ERR response for non-data FIS
0x0006 2 0 R_ERR response for device-to-host non-data FIS
0x0007 2 0 R_ERR response for host-to-device non-data FIS
0x0008 2 0 Device-to-host non-data FIS retries
0x0009 2 15 Transition from drive PhyRdy to drive PhyNRdy
0x000a 2 30 Device-to-host register FISes sent due to a
COMRESET
0x000b 2 8 CRC errors within host-to-device FIS
0x000d 2 5 Non-CRC errors within host-to-device FIS
0x000f 2 8 R_ERR response for host-to-device data FIS, CRC
0x0012 2 0 R_ERR response for host-to-device non-data FIS,
CRC
0x8000 4 318448 Vendor specific
-------------------------------------------------------------------------------
abyss lsdrv # smartctl --xall /dev/sdd
smartctl 6.5 2016-05-07 r4318 [x86_64-linux-4.10.2-gentoo] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke,
www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Western Digital Red
Device Model: WDC WD60EFRX-68L0BN1
Serial Number: WD-WX41D964EZK9
LU WWN Device Id: 5 0014ee 263752a6e
Firmware Version: 82.00A82
User Capacity: 6 001 175 126 016 bytes [6,00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 5700 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2, ACS-3 T13/2161-D revision 3b
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Fri Mar 17 14:41:57 2017 CET
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
ATA Security is: Disabled, frozen [SEC2]
Wt Cache Reorder: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x00) Offline data collection activity
was never started.
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: ( 9344) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection
on/off support.
Suspend Offline collection upon
new
command.
Offline surface scan supported.
Self-test supported.
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: ( 746) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x303d) SCT Status supported.
SCT Error Recovery Control
supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
1 Raw_Read_Error_Rate POSR-K 200 200 051 - 0
3 Spin_Up_Time POS--K 100 253 021 - 0
4 Start_Stop_Count -O--CK 100 100 000 - 5
5 Reallocated_Sector_Ct PO--CK 200 200 140 - 0
7 Seek_Error_Rate -OSR-K 100 253 000 - 0
9 Power_On_Hours -O--CK 100 100 000 - 246
10 Spin_Retry_Count -O--CK 100 253 000 - 0
11 Calibration_Retry_Count -O--CK 100 253 000 - 0
12 Power_Cycle_Count -O--CK 100 100 000 - 5
192 Power-Off_Retract_Count -O--CK 200 200 000 - 1
193 Load_Cycle_Count -O--CK 200 200 000 - 19
194 Temperature_Celsius -O---K 121 116 000 - 31
196 Reallocated_Event_Count -O--CK 200 200 000 - 0
197 Current_Pending_Sector -O--CK 200 200 000 - 0
198 Offline_Uncorrectable ----CK 100 253 000 - 0
199 UDMA_CRC_Error_Count -O--CK 200 200 000 - 0
200 Multi_Zone_Error_Rate ---R-- 100 253 000 - 0
||||||_ 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 5 Comprehensive SMART error log
0x03 GPL R/O 6 Ext. Comprehensive SMART error log
0x04 GPL,SL R/O 8 Device Statistics 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
0x0c GPL R/O 2048 Pending Defects log
0x10 GPL R/O 1 SATA NCQ Queued Error log
0x11 GPL R/O 1 SATA Phy Event Counters log
0x21 GPL R/O 1 Write stream error log
0x22 GPL R/O 1 Read stream error log
0x30 GPL,SL R/O 9 IDENTIFY DEVICE data log
0x80-0x9f GPL,SL R/W 16 Host vendor specific log
0xa0-0xa7 GPL,SL VS 16 Device vendor specific log
0xa8-0xb6 GPL,SL VS 1 Device vendor specific log
0xb7 GPL,SL VS 54 Device vendor specific log
0xbd GPL,SL VS 1 Device vendor specific log
0xc0 GPL,SL VS 1 Device vendor specific log
0xc1 GPL VS 93 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 (6 sectors)
No Errors Logged
SMART Extended Self-test Log Version: 1 (1 sectors)
No self-tests have been logged. [To run self-tests, use: smartctl -t]
SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute
delay.
SCT Status Version: 3
SCT Version (vendor specific): 258 (0x0102)
SCT Support Level: 1
Device State: Active (0)
Current Temperature: 31 Celsius
Power Cycle Min/Max Temperature: 30/36 Celsius
Lifetime Min/Max Temperature: 16/36 Celsius
Under/Over Temperature Limit Count: 0/0
Vendor specific:
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
SCT Temperature History Version: 2
Temperature Sampling Period: 1 minute
Temperature Logging Interval: 1 minute
Min/Max recommended Temperature: 0/60 Celsius
Min/Max Temperature Limit: -41/85 Celsius
Temperature History Size (Index): 478 (434)
Index Estimated Time Temperature Celsius
435 2017-03-17 06:44 30 ***********
... ..(463 skipped). .. ***********
421 2017-03-17 14:28 30 ***********
422 2017-03-17 14:29 31 ************
... ..( 11 skipped). .. ************
434 2017-03-17 14:41 31 ************
SCT Error Recovery Control:
Read: 70 (7,0 seconds)
Write: 70 (7,0 seconds)
Device Statistics (GP Log 0x04)
Page Offset Size Value Flags Description
0x01 ===== = = === == General Statistics (rev 2) ==
0x01 0x008 4 5 --- Lifetime Power-On Resets
0x01 0x010 4 246 --- Power-on Hours
0x01 0x018 6 23708519208 --- Logical Sectors Written
0x01 0x020 6 24687968 --- Number of Write Commands
0x01 0x028 6 11729201720 --- Logical Sectors Read
0x01 0x030 6 22155003 --- Number of Read Commands
0x03 ===== = = === == Rotating Media Statistics (rev
1) ==
0x03 0x008 4 246 --- Spindle Motor Power-on Hours
0x03 0x010 4 43 --- Head Flying Hours
0x03 0x018 4 21 --- Head Load Events
0x03 0x020 4 0 --- Number of Reallocated Logical
Sectors
0x03 0x028 4 0 --- Read Recovery Attempts
0x03 0x030 4 0 --- Number of Mechanical Start Failures
0x04 ===== = = === == General Errors Statistics (rev
1) ==
0x04 0x008 4 0 --- Number of Reported Uncorrectable
Errors
0x04 0x010 4 0 --- Resets Between Cmd Acceptance and
Completion
0x05 ===== = = === == Temperature Statistics (rev 1)
==
0x05 0x008 1 31 --- Current Temperature
0x05 0x010 1 30 --- Average Short Term Temperature
0x05 0x018 1 - --- Average Long Term Temperature
0x05 0x020 1 36 --- Highest Temperature
0x05 0x028 1 19 --- Lowest Temperature
0x05 0x030 1 33 --- Highest Average Short Term
Temperature
0x05 0x038 1 30 --- Lowest Average Short Term
Temperature
0x05 0x040 1 - --- Highest Average Long Term
Temperature
0x05 0x048 1 - --- Lowest Average Long Term
Temperature
0x05 0x050 4 0 --- Time in Over-Temperature
0x05 0x058 1 60 --- Specified Maximum Operating
Temperature
0x05 0x060 4 0 --- Time in Under-Temperature
0x05 0x068 1 0 --- Specified Minimum Operating
Temperature
0x06 ===== = = === == Transport Statistics (rev 1) ==
0x06 0x008 4 22 --- Number of Hardware Resets
0x06 0x010 4 3 --- Number of ASR Events
0x06 0x018 4 0 --- Number of Interface CRC Errors
|||_ C monitored condition met
||__ D supports DSN
|___ N normalized value
SATA Phy Event Counters (GP Log 0x11)
ID Size Value Description
0x0001 2 0 Command failed due to ICRC error
0x0002 2 0 R_ERR response for data FIS
0x0003 2 0 R_ERR response for device-to-host data FIS
0x0004 2 0 R_ERR response for host-to-device data FIS
0x0005 2 0 R_ERR response for non-data FIS
0x0006 2 0 R_ERR response for device-to-host non-data FIS
0x0007 2 0 R_ERR response for host-to-device non-data FIS
0x0008 2 0 Device-to-host non-data FIS retries
0x0009 2 2 Transition from drive PhyRdy to drive PhyNRdy
0x000a 2 4 Device-to-host register FISes sent due to a
COMRESET
0x000b 2 0 CRC errors within host-to-device FIS
0x000d 2 0 Non-CRC errors within host-to-device FIS
0x000f 2 0 R_ERR response for host-to-device data FIS, CRC
0x0012 2 0 R_ERR response for host-to-device non-data FIS,
CRC
0x8000 4 318477 Vendor specific
abyss lsdrv # mdadm --examine /dev/sdc
/dev/sdc:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 183ad93e:c604b817:7099c950:12d36bab
Name : abyss:md6to (local to host abyss)
Creation Time : Mon Mar 13 22:11:47 2017
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 11720783024 (5588.90 GiB 6001.04 GB)
Array Size : 5860391488 (5588.90 GiB 6001.04 GB)
Used Dev Size : 11720782976 (5588.90 GiB 6001.04 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=48 sectors
State : clean
Device UUID : b55a87f4:15d145d1:19979cc5:e1eafc32
Internal Bitmap : 8 sectors from superblock
Update Time : Fri Mar 17 14:24:32 2017
Bad Block Log : 512 entries available at offset 32 sectors
Checksum : b949b844 - correct
Events : 9925
Device Role : Active device 1
Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
-----------------------------------------------------------------------------
abyss lsdrv # mdadm --examine /dev/sdd
/dev/sdd:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 183ad93e:c604b817:7099c950:12d36bab
Name : abyss:md6to (local to host abyss)
Creation Time : Mon Mar 13 22:11:47 2017
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 11720783024 (5588.90 GiB 6001.04 GB)
Array Size : 5860391488 (5588.90 GiB 6001.04 GB)
Used Dev Size : 11720782976 (5588.90 GiB 6001.04 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=48 sectors
State : clean
Device UUID : ddbae969:eae9cb91:fb7fa642:1932781a
Internal Bitmap : 8 sectors from superblock
Update Time : Fri Mar 17 14:24:32 2017
Bad Block Log : 512 entries available at offset 32 sectors
Checksum : 53b76159 - correct
Events : 9925
Device Role : Active device 0
Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
-----------------------------------------------------------------------------
abyss lsdrv # mdadm --detail /dev/md127
/dev/md127:
Version : 1.2
Creation Time : Mon Mar 13 22:11:47 2017
Raid Level : raid1
Array Size : 5860391488 (5588.90 GiB 6001.04 GB)
Used Dev Size : 5860391488 (5588.90 GiB 6001.04 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Fri Mar 17 14:24:32 2017
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : abyss:md6to (local to host abyss)
UUID : 183ad93e:c604b817:7099c950:12d36bab
Events : 9925
Number Major Minor RaidDevice State
0 8 48 0 active sync /dev/sdd
1 8 32 1 active sync /dev/sdc
-----------------------------------------------------------------------------
abyss lsdrv # python2.7 lsdrv
PCI [hptiop] 01:00.0 RAID bus controller: HighPoint Technologies, Inc.
Device 3520 (rev 09)
└scsi 0:0:0:0 HPT VD0-0 {}
└sda 8.19t [8:0] Partitioned (gpt)
└sda1 8.19t [8:1] ext4 {7262b140-e026-4b53-bc6b-2ac1c1cc4538}
└Mounted as /dev/sda1 @ /mnt
PCI [ahci] 00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD]
FCH SATA Controller [AHCI mode] (rev 40)
├scsi 1:0:0:0 ATA OCZ-VERTEX4 {OCZ-9NYS802X56U11736}
│└sdb 238.47g [8:16] Partitioned (dos)
│ └sdb1 238.47g [8:17] ext4 {6de79b5d-dc44-4362-86af-b483fbbe1c65}
│ └Mounted as /dev/sdb1 @ /
├scsi 2:0:0:0 ATA WDC WD60EFRX-68L {WD-WX11D76EPFJV}
│└sdc 5.46t [8:32] MD raid1 (1/2) (w/ sdd) in_sync 'abyss:md6to'
{183ad93e-c604-b817-7099-c95012d36bab}
│ └md127 5.46t [9:127] MD v1.2 raid1 (2) clean
{183ad93e:c604b817:7099c950:12d36bab}
│ Empty/Unknown
├scsi 3:0:0:0 ATA WDC WD60EFRX-68L {WD-WX41D964EZK9}
│└sdd 5.46t [8:48] MD raid1 (0/2) (w/ sdc) in_sync 'abyss:md6to'
{183ad93e-c604-b817-7099-c95012d36bab}
│ └md127 5.46t [9:127] MD v1.2 raid1 (2) clean
{183ad93e:c604b817:7099c950:12d36bab}
│ Empty/Unknown
├scsi 4:x:x:x [Empty]
-----------------------------------------------------------------------------
abyss lsdrv # cat /proc/mdstat
Personalities : [raid1] [raid10] [raid6] [raid5] [raid4]
md127 : active raid1 sdd[0] sdc[1]
5860391488 blocks super 1.2 [2/2] [UU]
bitmap: 0/44 pages [0KB], 65536KB chunk
unused devices: <none>
-----------------------------------------------------------------------------
abyss lsdrv # mdadm --version
mdadm - v4.0 - 2017-01-09
-----------------------------------------------------------------------------
abyss lsdrv # uname -a
Linux abyss 4.10.2-gentoo #2 SMP Mon Mar 13 21:46:37 CET 2017 x86_64
AMD A8-5600K APU with Radeon(tm) HD Graphics AuthenticAMD GNU/Linux
Thanks for your help.
Youenn.
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