Raid Health Degraded

My Cloud OS 3 Personal & Network Attached Storage My Cloud Pro Series
1

I have a mycloud FR4100 having hard drive WD SATA 6TB 64Mb cache x 4 configured with RAID 5 with 4(four) hard drive and hard drive #4 having Red light . The power led is flashing red and the display reads Vol 1. Degraded see dashboard.

The NAS is configured with one RAID 5 volume and when I open the dashboard it goes to the RAID Profile screen which says that RAID Health is degraded. I did a manual rebuild and it still reports the volume as degraded and the Disk Status, all four drives report GOOD. I took a look at the S.M.A.R.T status, but I’m not certain what it is telling me. I need to do some more research, Essentially what I am trying to understand is which disk is going bad (I am assuming that some disk error is the root cause).

I’m a little surprised by this as this NAS and the drives are under a year old and they don’t get that much use. It is used to backup.

I pull out the hard disk #4 , and wait couple of minute, then insert in to the same location , and Rebuilt Manual Raid , it took time 2 to 3 hours to rebuilt , after that all is fine as previous, but still Red light on hard drive #4 , and same error “Raid Health Degraded”

Please reply with your expert opinion.

Thanks
Imran Khan

2

SMART status doesn’t get reported in the GUI as they cut off the field that contains the actual value. Look up smart info by user dsvw for more info.
Did you replace the drive with a new drive or did you rebuild with the same as before?
Your drives are still under warranty.

3

no I didn’t replace with a new hard drive ,

I used same hard drive , just pull and push on same slot,

Then i rebuilt RAID manually.

But still same error “RAID Degraded”

Regards,
Imran Khan

4

See here: Donec Facilisis Lacinia - #172
Use SSH and share the output of

smartctl -A /dev/sdd

I suspect the disk reports errors in its SMART data, so you should replace it with a new disk.
Use the warranty to get a new disk.

Don’t put your drives under useless stress (e.g. rebuilding with a bad disk) because you lose all data on the next failure.

5

Please find the output as per your request.

root@MyCloudPR4100 root # smartctl -A /dev/sdd
smartctl version 5.38 [x86_64-intel-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF READ SMART DATA SECTION ===
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 198 197 021 Pre-fail Always - 9100
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 516
5 Reallocated_Sector_Ct 0x0033 186 186 140 Pre-fail Always - 420
7 Seek_Error_Rate 0x002e 195 195 000 Old_age Always - 341
9 Power_On_Hours 0x0032 097 097 000 Old_age Always - 2888
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 - 27
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 12
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 504
194 Temperature_Celsius 0x0022 130 111 000 Old_age Always - 22
196 Reallocated_Event_Count 0x0032 169 169 000 Old_age Always - 31
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

6
- attribute myhealthydisk yourbaddisk
2 Raw_Read_Error_Rate 0 0
3 Spin_Up_Time 6491 9100
4 Start_Stop_Count 14087 516
5 Reallocated_Sector_Ct 0 420
7 Seek_Error_Rate 0 341
9 Power_On_Hours 13237 2888
10 Spin_Retry_Count 0 0
11 Calibration_Retry_Count 0 0
12 Power_Cycle_Count 108 27
192 Power-Off_Retract_Count 55 12
193 Load_Cycle_Count 23367 504
194 Temperature_Celsius 33 22
196 Reallocated_Event_Count 0 31
197 Current_Pending_Sector 0 0
198 Offline_Uncorrectable 0 0
199 UDMA_CRC_Error_Count 0 0
200 Multi_Zone_Error_Rate 0 0

You have several broken sectors, replace the disk with a new one.

7

Ok, Thanks for prompt Reply.

Can you inform how can i claim the warranty , because i checked the serial# of faulty harddrive on internet .

its shows your harddrive warranty will expire on 2019.

so how can i claim warranty , because we forget from where we purchased this, Also we don’t have any invoice for this , can we trace seller of this device via internet , sorry i know this question is not related with you, if you have any knowledge so please share with us.

Thanks
Imran Khan

8

See http://lmgtfy.com/?q=western+digital+drive+warranty
EDIT: just call support.

9

I just figured out why i have SMART bad errors when trying to install drives on my PR4100 NAS
Actually i started with a EX4100, couldn’t get 4 drives to install and assumed it was the NAS, Bought the PR4100 and same problem. I had gone through purchasing 7 drives returned two and could not get more than 3 to install under raid 5. I was getting random SMART bad messages.
After wasting a lot of money i realized that when i set up the latest PR4100 unit i was still using the previous EX4100’s power supply. I put a different power supply on the unit and it installed immediately.
Probably another good reason to run two power supplies! I’m not a tech guy, hoping this will help save someone else some frustration