I have a MyCloud EX2 Ultra configured as RAID 1 with 2GB x 2GB hard drives. A couple of days ago I began hearing one of the drives constantly resetting and/or re-reading sectors. I’ve been in I.T. for many years so I know the sound very well!
All data is still accessible (the whole point of RAID 1)
When I use the Web interface to check the status, it tells me the RAID is active and healthy.
In the S.M.A.R.T. stats, there are read/write errors etc., but the statistics are identical no matter which disk I select. So it doesn’t help me identify the failing disk.
How can I figure out which disk is making the noise and replace it? Or do I need to wait for it to completely fail?
root@MyCloudEX2Ultra root # smartctl -A /dev/sda
smartctl version 5.38 [arm-marvell-linux-gnueabi] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
root@MyCloudEX2Ultra root # smartctl -A /dev/sdb
smartctl version 5.38 [arm-marvell-linux-gnueabi] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
root@MyCloudEX2Ultra root # mdadm --query --detail /dev/md0
/dev/md0:
Version : 00.90
Creation Time : Wed May 23 03:03:42 2018
Raid Level : raid1
Array Size : 2097088 (2048.28 MiB 2147.42 MB)
Used Dev Size : 2097088 (2048.28 MiB 2147.42 MB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Tue Sep 11 16:00:02 2018
State : active
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : d763a362:237a87a8:97e81ee5:c9cc8dd3
Events : 0.1
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
root@MyCloudEX2Ultra root # root@MyCloudEX2Ultra root # smartctl -A /dev/sda
-sh: root@MyCloudEX2Ultra: not found
root@MyCloudEX2Ultra root # smartctl version 5.38 [arm-marvell-linux-gnueabi] Co
pyright (C) 2002-8 Bruce Allen
-sh: syntax error: unexpected “(”
root@MyCloudEX2Ultra root # Home page is http://smartmontools.sourceforge.net/
-sh: Home: not found
root@MyCloudEX2Ultra root #
root@MyCloudEX2Ultra root # === START OF READ SMART DATA SECTION ===
-sh: ===: not found
root@MyCloudEX2Ultra root # SMART Attributes Data Structure revision number: 16
-sh: SMART: not found
root@MyCloudEX2Ultra root # Vendor Specific SMART Attributes with Thresholds:
-sh: Vendor: not found
root@MyCloudEX2Ultra root # ID# ATTRIBUTE_NAME FLAG VALUE WORST THR
ESH TYPE UPDATED WHEN_FAILED RAW_VALUE
-sh: ID#: not found
root@MyCloudEX2Ultra root # 1 Raw_Read_Error_Rate 0x002f 200 200 051
Pre-fail Always - 0
-sh: 1: not found
root@MyCloudEX2Ultra root # 3 Spin_Up_Time 0x0027 190 175 021
Pre-fail Always - 3475
-sh: 3: not found
root@MyCloudEX2Ultra root # 4 Start_Stop_Count 0x0032 067 067 000
Old_age Always - 33056
-sh: 4: not found
root@MyCloudEX2Ultra root # 5 Reallocated_Sector_Ct 0x0033 200 200 140
Pre-fail Always - 0
-sh: 5: not found
root@MyCloudEX2Ultra root # 7 Seek_Error_Rate 0x002e 200 200 000
Old_age Always - 0
-sh: 7: not found
root@MyCloudEX2Ultra root # 9 Power_On_Hours 0x0032 071 071 000
Old_age Always - 21759
-sh: 9: not found
root@MyCloudEX2Ultra root # 10 Spin_Retry_Count 0x0032 100 100 000
Old_age Always - 0
-sh: 10: not found
root@MyCloudEX2Ultra root # 11 Calibration_Retry_Count 0x0032 100 253 000
Old_age Always - 0
-sh: 11: not found
root@MyCloudEX2Ultra root # 12 Power_Cycle_Count 0x0032 100 100 000
Old_age Always - 45
-sh: 12: not found
root@MyCloudEX2Ultra root # 192 Power-Off_Retract_Count 0x0032 200 200 000
Old_age Always - 33
-sh: 192: not found
root@MyCloudEX2Ultra root # 193 Load_Cycle_Count 0x0032 189 189 000
Old_age Always - 33092
-sh: 193: not found
root@MyCloudEX2Ultra root # 194 Temperature_Celsius 0x0022 098 094 000
Old_age Always - 49
-sh: 194: not found
root@MyCloudEX2Ultra root # 196 Reallocated_Event_Count 0x0032 200 200 000
Old_age Always - 0
-sh: 196: not found
root@MyCloudEX2Ultra root # 197 Current_Pending_Sector 0x0032 200 200 000
Old_age Always - 0
-sh: 197: not found
root@MyCloudEX2Ultra root # 198 Offline_Uncorrectable 0x0030 100 253 000
Old_age Offline - 0
-sh: 198: not found
root@MyCloudEX2Ultra root # 199 UDMA_CRC_Error_Count 0x0032 200 200 000
Old_age Always - 0
-sh: 199: not found
root@MyCloudEX2Ultra root # 200 Multi_Zone_Error_Rate 0x0008 100 253 000
Old_age Offline - 0
-sh: 200: not found
root@MyCloudEX2Ultra root #
root@MyCloudEX2Ultra root # root@MyCloudEX2Ultra root # smartctl -A /dev/sdb
-sh: root@MyCloudEX2Ultra: not found
root@MyCloudEX2Ultra root # smartctl version 5.38 [arm-marvell-linux-gnueabi] Co
pyright (C) 2002-8 Bruce Allen
-sh: syntax error: unexpected “(”
root@MyCloudEX2Ultra root # Home page is http://smartmontools.sourceforge.net/
-sh: Home: not found
root@MyCloudEX2Ultra root #
root@MyCloudEX2Ultra root # === START OF READ SMART DATA SECTION ===
-sh: ===: not found
root@MyCloudEX2Ultra root # SMART Attributes Data Structure revision number: 16
-sh: SMART: not found
root@MyCloudEX2Ultra root # Vendor Specific SMART Attributes with Thresholds:
-sh: Vendor: not found
root@MyCloudEX2Ultra root # ID# ATTRIBUTE_NAME FLAG VALUE WORST THR
ESH TYPE UPDATED WHEN_FAILED RAW_VALUE
-sh: ID#: not found
root@MyCloudEX2Ultra root # 1 Raw_Read_Error_Rate 0x002f 200 200 051
Pre-fail Always - 0
-sh: 1: not found
root@MyCloudEX2Ultra root # 3 Spin_Up_Time 0x0027 189 174 021
Pre-fail Always - 3516
-sh: 3: not found
root@MyCloudEX2Ultra root # 4 Start_Stop_Count 0x0032 067 067 000
Old_age Always - 33163
-sh: 4: not found
root@MyCloudEX2Ultra root # 5 Reallocated_Sector_Ct 0x0033 200 200 140
Pre-fail Always - 0
-sh: 5: not found
root@MyCloudEX2Ultra root # 7 Seek_Error_Rate 0x002e 200 200 000
Old_age Always - 0
-sh: 7: not found
root@MyCloudEX2Ultra root # 9 Power_On_Hours 0x0032 071 071 000
Old_age Always - 21759
-sh: 9: not found
root@MyCloudEX2Ultra root # 10 Spin_Retry_Count 0x0032 100 100 000
Old_age Always - 0
-sh: 10: not found
root@MyCloudEX2Ultra root # 11 Calibration_Retry_Count 0x0032 100 253 000
Old_age Always - 0
-sh: 11: not found
root@MyCloudEX2Ultra root # 12 Power_Cycle_Count 0x0032 100 100 000
Old_age Always - 45
-sh: 12: not found
root@MyCloudEX2Ultra root # 192 Power-Off_Retract_Count 0x0032 200 200 000
Old_age Always - 33
-sh: 192: not found
root@MyCloudEX2Ultra root # 193 Load_Cycle_Count 0x0032 189 189 000
Old_age Always - 33199
-sh: 193: not found
root@MyCloudEX2Ultra root # 194 Temperature_Celsius 0x0022 097 094 000
Old_age Always - 50
-sh: 194: not found
root@MyCloudEX2Ultra root # 196 Reallocated_Event_Count 0x0032 200 200 000
Old_age Always - 0
-sh: 196: not found
root@MyCloudEX2Ultra root # 197 Current_Pending_Sector 0x0032 200 200 000
Old_age Always - 0
-sh: 197: not found
root@MyCloudEX2Ultra root # 198 Offline_Uncorrectable 0x0030 100 253 000
Old_age Offline - 0
-sh: 198: not found
root@MyCloudEX2Ultra root # 199 UDMA_CRC_Error_Count 0x0032 200 200 000
Old_age Always - 0
-sh: 199: not found
root@MyCloudEX2Ultra root # 200 Multi_Zone_Error_Rate 0x0008 100 253 000
Old_age Offline - 0
-sh: 200: not found
root@MyCloudEX2Ultra root #
root@MyCloudEX2Ultra root # root@MyCloudEX2Ultra root # mdadm --query --detail /
dev/md0
-sh: root@MyCloudEX2Ultra: not found
root@MyCloudEX2Ultra root # /dev/md0:
-sh: /dev/md0:: not found
root@MyCloudEX2Ultra root # Version : 00.90
-sh: Version: not found
root@MyCloudEX2Ultra root # Creation Time : Wed May 23 03:03:42 2018
-sh: Creation: not found
root@MyCloudEX2Ultra root # Raid Level : raid1
-sh: Raid: not found
root@MyCloudEX2Ultra root # Array Size : 2097088 (2048.28 MiB 2147.42 MB)
-sh: syntax error: unexpected “(”
root@MyCloudEX2Ultra root # Used Dev Size : 2097088 (2048.28 MiB 2147.42 MB)
-sh: syntax error: unexpected “(”
root@MyCloudEX2Ultra root # Raid Devices : 2
-sh: Raid: not found
root@MyCloudEX2Ultra root # Total Devices : 2
-sh: Total: not found
root@MyCloudEX2Ultra root # Preferred Minor : 0
-sh: Preferred: not found
root@MyCloudEX2Ultra root # Persistence : Superblock is persistent
-sh: Persistence: not found
root@MyCloudEX2Ultra root #
root@MyCloudEX2Ultra root # Intent Bitmap : Internal
-sh: Intent: not found
root@MyCloudEX2Ultra root #
root@MyCloudEX2Ultra root # Update Time : Tue Sep 11 16:00:02 2018
-sh: Update: not found
root@MyCloudEX2Ultra root # State : active
-sh: State: not found
root@MyCloudEX2Ultra root # Active Devices : 2
-sh: Active: not found
root@MyCloudEX2Ultra root # Working Devices : 2
-sh: Working: not found
root@MyCloudEX2Ultra root # Failed Devices : 0
-sh: Failed: not found
root@MyCloudEX2Ultra root # Spare Devices : 0
-sh: Spare: not found
root@MyCloudEX2Ultra root #
root@MyCloudEX2Ultra root # UUID : d763a362:237a87a8:97e81ee5:c9cc8dd
3
-sh: UUID: not found
root@MyCloudEX2Ultra root # Events : 0.1
-sh: Events: not found
root@MyCloudEX2Ultra root #
root@MyCloudEX2Ultra root # Number Major Minor RaidDevice State
-sh: Number: not found
root@MyCloudEX2Ultra root # 0 8 1 0 active sync
/dev/sda1
-sh: 0: not found
root@MyCloudEX2Ultra root # 1 8 17 1 active sync
/dev/sdb1
-sh: 1: not found
Well, that gives me pause, but I guess there’s not much to be done about it!
I’d probably agree except that this is an entirely new development - I’ve had the unit for two years I think and it just started doing this. I haven’t added a lot of data recently or anything like that. It really sounds like when a drive is trying to re-read a bad sector, and occurs like 6-7 times every few minutes.
Maybe I’ll just try rebooting it and see what happens, I’ll lyk.
Thanks so much for your help, I really appreciate it!