Update: I have added output from smartctl short tests for all drives. One seems to be generating errors, but overall tests have passed.
A few days ago I set up a fresh software RAID10 (mdadm) using 4 4TB hard drives.
According to the output from mdadm -d and cat /proc/mdstat, all RAID devices are functioning properly. However, straight away, I noticed that operations such as creating a directory would take a few seconds around half of the time.
Resyncing is also taking an incredibly long time (up and running since 25th of October, but only 10% synced).
And lastly, since today, I have had issues accessing the mounted drive array. When using cd the shell hangs once I use tab to autocomplete the path past the drive's root directory. When using df -h on a remote host that mounts the RAID array as a Samba share, I get the message 'Host is down' or 'Resource temporarily unavailable' after a minute or two.
$ sudo mdadm -D /dev/md1
/dev/md1:
Version : 1.2
Creation Time : Mon Oct 25 20:18:15 2021
Raid Level : raid10
Array Size : 7813769216 (7451.79 GiB 8001.30 GB)
Used Dev Size : 3906884608 (3725.90 GiB 4000.65 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Fri Oct 29 05:24:29 2021
State : active, resyncing
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : near=2
Chunk Size : 512K
Consistency Policy : bitmap
Resync Status : 10% complete
Name : i7-harvester:1 (local to host i7-harvester)
UUID : eb089c26:4b9b1dc7:7d9481f9:69e5a3df
Events : 42562
Number Major Minor RaidDevice State
0 8 17 0 active sync set-A /dev/sdb1
1 8 33 1 active sync set-B /dev/sdc1
2 8 49 2 active sync set-A /dev/sdd1
3 8 65 3 active sync set-B /dev/sde1
(note the speed reported by mdstat used to be around 3000k, but has since today decreased to 3K/sec)
$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md1 : active raid10 sde1[3] sdd1[2] sdc1[1] sdb1[0]
7813769216 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU]
[==>..................] resync = 10.7% (837141440/7813769216) finish=33547280.3min speed=3K/sec
bitmap: 53/59 pages [212KB], 65536KB chunk
df on remote system
$ df -h
df: /mnt/data: Resource temporarily unavailable
Filesystem Size Used Avail Use% Mounted on
/dev/root 59G 13G 44G 22% /
devtmpfs 1.8G 0 1.8G 0% /dev
tmpfs 1.9G 8.0K 1.9G 1% /dev/shm
tmpfs 1.9G 202M 1.7G 11% /run
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mmcblk0p1 253M 49M 204M 20% /boot
/dev/sda1 1.8T 131G 1.6T 8% /mnt/nas
$ sudo smartctl -a /dev/sdb
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.11.0-38-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Hitachi/HGST Ultrastar 7K4000
Device Model: HGST HUS724040ALA640
LU WWN Device Id: 5 000cca 22bf6d532
Add. Product Id: DELL(tm)
Firmware Version: MFAOAB50
User Capacity: 4.000.787.030.016 bytes [4,00 TB]
Sector Size: 512 bytes logical/physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 4
SATA Version is: SATA 3.0, 3.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Sat Oct 30 09:11:05 2021 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x82) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Enabled.
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: ( 24) seconds.
Offline data collection
capabilities: (0x5b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
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: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 533) 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: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0
2 Throughput_Performance 0x0004 138 138 000 Old_age Offline - 75
3 Spin_Up_Time 0x0007 127 127 024 Pre-fail Always - 609 (Average 607)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 30
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
7 Seek_Error_Rate 0x000a 100 100 000 Old_age Always - 0
8 Seek_Time_Performance 0x0004 140 140 000 Old_age Offline - 26
9 Power_On_Hours 0x0012 092 092 000 Old_age Always - 62287
10 Spin_Retry_Count 0x0012 100 100 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 30
192 Power-Off_Retract_Count 0x0032 099 099 000 Old_age Always - 1473
193 Load_Cycle_Count 0x0012 099 099 000 Old_age Always - 1473
194 Temperature_Celsius 0x0002 157 157 000 Old_age Always - 38 (Min/Max 18/47)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0
223 Load_Retry_Count 0x000a 100 100 000 Old_age Always - 0
241 Total_LBAs_Written 0x0012 100 100 000 Old_age Always - 265905350843
242 Total_LBAs_Read 0x0012 100 100 000 Old_age Always - 1599707339787
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Completed without error 00% 62275 -
# 2 Short offline Completed without error 00% 61911 -
# 3 Short offline Completed without error 00% 12 -
# 4 Extended offline Completed without error 00% 12 -
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.
$ sudo smartctl -a /dev/sdc
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.11.0-38-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Hitachi/HGST Ultrastar 7K4000
Device Model: HGST HUS724040ALA640
LU WWN Device Id: 5 000cca 23dc4c637
Add. Product Id: DELL(tm)
Firmware Version: MFAOAB50
User Capacity: 4.000.787.030.016 bytes [4,00 TB]
Sector Size: 512 bytes logical/physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 4
SATA Version is: SATA 3.0, 3.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Sat Oct 30 09:13:13 2021 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x82) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Enabled.
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: ( 24) seconds.
Offline data collection
capabilities: (0x5b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
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: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 553) 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: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0
2 Throughput_Performance 0x0004 139 139 000 Old_age Offline - 73
3 Spin_Up_Time 0x0007 125 125 024 Pre-fail Always - 624 (Average 611)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 27
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
7 Seek_Error_Rate 0x000a 100 100 000 Old_age Always - 0
8 Seek_Time_Performance 0x0004 138 138 000 Old_age Offline - 27
9 Power_On_Hours 0x0012 093 093 000 Old_age Always - 50333
10 Spin_Retry_Count 0x0012 100 100 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 27
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 380
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always - 380
194 Temperature_Celsius 0x0002 162 162 000 Old_age Always - 37 (Min/Max 20/46)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0
223 Load_Retry_Count 0x000a 100 100 000 Old_age Always - 0
241 Total_LBAs_Written 0x0012 100 100 000 Old_age Always - 186666664018
242 Total_LBAs_Read 0x0012 100 100 000 Old_age Always - 1482419943771
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Completed without error 00% 50321 -
# 2 Short offline Completed without error 00% 49927 -
# 3 Short offline Completed without error 00% 11 -
# 4 Extended offline Completed without error 00% 11 -
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.
$ sudo smartctl -a /dev/sdd
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.11.0-38-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Western Digital Red
Device Model: WDC WD40EFRX-68WT0N0
LU WWN Device Id: 5 0014ee 2b6822d7f
Firmware Version: 82.00A82
User Capacity: 4.000.787.030.016 bytes [4,00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 5400 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2 (minor revision not indicated)
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Sat Oct 30 09:14:05 2021 CEST
SMART support is: Available - device has SMART capability.
SMART support is: 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: (51720) 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: ( 517) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x703d) 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 FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0
3 Spin_Up_Time 0x0027 209 177 021 Pre-fail Always - 6508
4 Start_Stop_Count 0x0032 098 098 000 Old_age Always - 2532
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x002e 100 253 000 Old_age Always - 0
9 Power_On_Hours 0x0032 060 060 000 Old_age Always - 29367
10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0
11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 21
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 15
193 Load_Cycle_Count 0x0032 196 196 000 Old_age Always - 14465
194 Temperature_Celsius 0x0022 115 097 000 Old_age Always - 37
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0
SMART Error Log Version: 1
ATA Error Count: 2
CR = Command Register [HEX]
FR = Features Register [HEX]
SC = Sector Count Register [HEX]
SN = Sector Number Register [HEX]
CL = Cylinder Low Register [HEX]
CH = Cylinder High Register [HEX]
DH = Device/Head Register [HEX]
DC = Device Command Register [HEX]
ER = Error register [HEX]
ST = Status register [HEX]
Powered_Up_Time is measured from power on, and printed as
DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes,
SS=sec, and sss=millisec. It "wraps" after 49.710 days.
Error 2 occurred at disk power-on lifetime: 28742 hours (1197 days + 14 hours)
When the command that caused the error occurred, the device was active or idle.
After command completion occurred, registers were:
ER ST SC SN CL CH DH
-- -- -- -- -- -- --
10 51 10 e0 32 1e e0 Error: IDNF at LBA = 0x001e32e0 = 1979104
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
ca 00 10 e0 32 1e e0 08 3d+00:35:32.256 WRITE DMA
ca 00 08 00 29 0c e0 08 3d+00:35:32.245 WRITE DMA
ca 00 08 c0 0f 19 e0 08 3d+00:35:32.234 WRITE DMA
ca 00 40 a8 44 1f e0 08 3d+00:35:32.175 WRITE DMA
Error 1 occurred at disk power-on lifetime: 28670 hours (1194 days + 14 hours)
When the command that caused the error occurred, the device was active or idle.
After command completion occurred, registers were:
ER ST SC SN CL CH DH
-- -- -- -- -- -- --
10 51 08 80 06 4c e0 Error: IDNF at LBA = 0x004c0680 = 4982400
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
ca 00 08 80 06 4c e0 08 13d+13:29:55.786 WRITE DMA
b0 d0 01 00 4f c2 00 08 13d+13:29:47.191 SMART READ DATA
ec 00 00 00 00 00 00 08 13d+13:29:47.191 IDENTIFY DEVICE
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Completed without error 00% 29354 -
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.
$ sudo smartctl -a /dev/sde
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.11.0-38-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Seagate Desktop HDD.15
Device Model: ST4000DM000-1F2168
LU WWN Device Id: 5 000c50 05070b3a5
Firmware Version: CC52
User Capacity: 4.000.787.030.016 bytes [4,00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 5900 rpm
Form Factor: 3.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 4
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 1.5 Gb/s)
Local Time is: Sat Oct 30 09:15:01 2021 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
See vendor-specific Attribute list for marginal Attributes.
General SMART Values:
Offline data collection status: (0x82) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Enabled.
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: ( 623) 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: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 540) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x1085) SCT Status supported.
SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000f 111 099 006 Pre-fail Always - 33492856
3 Spin_Up_Time 0x0003 093 091 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 256
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 067 060 030 Pre-fail Always - 5757534
9 Power_On_Hours 0x0032 092 092 000 Old_age Always - 7873
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 131
183 Runtime_Bad_Block 0x0032 087 087 000 Old_age Always - 13
184 End-to-End_Error 0x0032 100 100 099 Old_age Always - 0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
188 Command_Timeout 0x0032 099 087 000 Old_age Always - 1002 1042 1081
189 High_Fly_Writes 0x003a 099 099 000 Old_age Always - 1
190 Airflow_Temperature_Cel 0x0022 066 045 045 Old_age Always In_the_past 34 (Min/Max 25/36)
191 G-Sense_Error_Rate 0x0032 100 100 000 Old_age Always - 0
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 101
193 Load_Cycle_Count 0x0032 090 090 000 Old_age Always - 21749
194 Temperature_Celsius 0x0022 034 055 000 Old_age Always - 34 (0 1 0 0 0)
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x003e 199 194 000 Old_age Always - 790247
240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline - 1330h+40m+55.940s
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 39004091013
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 16225042845
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Completed without error 00% 7861 -
# 2 Short offline Interrupted (host reset) 90% 7762 -
# 3 Short offline Completed without error 00% 0 -
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.
I'm at a loss on how to troubleshoot or fix (I'm new to RAIDs), so any help would be greatly appreciated.
