Re: RAID1 degraded

[Hans Malissa <hmalissa@me.com>]

Thanks a lot for your help!
smartctl yields the following information (details see below): /dev/sdb looks ok, but /dev/sdc seems to have quite a problem. /dev/sdc seems nonexistent, it’s not even in /dev/ anymore. The disk is physically present, but that’s about it.
The kernel logs contain a lot of information; what should I be looking for?
Thanks a lot,

Hans

# smartctl -a /dev/sdb
smartctl 6.0 2012-10-10 r3643 [x86_64-linux-3.7.10-1.45-desktop] (SUSE RPM)
Copyright (C) 2002-12, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda 7200.14 (AF)
Device Model:     ST1000DM003-1ER162
Serial Number:    Z4Y6N2J3
LU WWN Device Id: 5 000c50 07afe5c18
Firmware Version: CC45
User Capacity:    1,000,204,886,016 bytes [1.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 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:    Mon Aug  3 21:52:32 2015 MDT

==> WARNING: A firmware update for this drive may be available,
see the following Seagate web pages:
http://knowledge.seagate.com/articles/en_US/FAQ/207931en
http://knowledge.seagate.com/articles/en_US/FAQ/223651en

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:                (   80) seconds.
Offline data collection
capabilities:                    (0x73) 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.
                                        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:        ( 105) 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   100   006    Pre-fail  Always       -       39301104
  3 Spin_Up_Time            0x0003   097   097   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       20
  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   063   060   030    Pre-fail  Always       -       2152462
  9 Power_On_Hours          0x0032   098   098   000    Old_age   Always       -       1872
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       20
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
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   100   100   000    Old_age   Always       -       0 0 0
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   068   064   045    Old_age   Always       -       32 (Min/Max 26/35)
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       -       0
193 Load_Cycle_Count        0x0032   093   093   000    Old_age   Always       -       15119
194 Temperature_Celsius     0x0022   032   040   000    Old_age   Always       -       32 (0 19 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   200   200   000    Old_age   Always       -       0
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       662h+04m+56.474s
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       2212066311
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       4204083236

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
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.

# smartctl -a /dev/sdc
smartctl 6.0 2012-10-10 r3643 [x86_64-linux-3.7.10-1.45-desktop] (SUSE RPM)
Copyright (C) 2002-12, Bruce Allen, Christian Franke, www.smartmontools.org

Smartctl open device: /dev/sdc failed: No such device

On Aug 3, 2015, at 5:48 PM, Adam Goryachev <mailinglists@websitemanagers.com.au> wrote:

> On 04/08/15 08:18, Hans Malissa wrote:
>> Hi everybody,
>> 
>> It looks like one of my disks in my RAID1 just failed:
>> 
>> [SNIP]
>> 
>> Are there any other tests I could run in order to figure out what’s going on? It looks like I will have to replace /dev/sdc1 with a new hard drive. What is the correct procedure to do so without loosing my data?
>> 
> Have a look at dmesg or your system kernel logs for details.
> Also, use smartctl to examine what the drive itself thinks.
> Also, try to use dd to read/write the drive.
> 
> One common scenario is that you haven't configured the timing for the drive correctly, and the drive is working perfectly, but didn't respond to the kernel quickly enough. Research SCT/ERC on this list
> 
> Regards,
> Adam
> -- 
> Adam Goryachev Website Managers www.websitemanagers.com.au

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