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Date: Thu, 18 Aug 2011 00:08:53 +0300
From: Thomas Backlund <tmb@...eia.org>
To: Andreas Dilger <adilger@...ger.ca>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: INFO: task jbd2/dm-0-8:3993 blocked for more than 120 seconds
Andreas Dilger skrev 17.8.2011 17:35:
> On 2011-08-17, at 7:31 AM, Thomas Backlund<tmb@...eia.org> wrote:
>>
>> One of our buildnodes, a 8-core Supermicro X7DA8 system,
>> and a WDC WD1002FAEX-0 sata disk hits the "blocked for more than 120 seconds" several times, and ends up resetting the ata bus.
>>
>> The disk does not report any errors with smart, and we have the same model in a 24-core Supermicro X8DTN, and it does not show this problem.
>>
>> ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>> ata3.00: failed command: FLUSH CACHE EXT
>> ata3.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>> res 40/00:00:01:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
>> ata3.00: status: { DRDY }
>> ata3: soft resetting link
>> ata3.00: configured for UDMA/133
>> ata3.00: retrying FLUSH 0xea Emask 0x4
>> ata3: EH complete
>
> This is a problem with your disk hardware.
>
Are you sure?
I get nothing from smart, even after I had executed the long test...
# smartctl -a /dev/sda
smartctl 5.39.1 2010-01-28 r3054 [x86_64-mandriva-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net
=== START OF INFORMATION SECTION ===
Device Model: WDC WD1002FAEX-00Z3A0
Serial Number: WD-WCATR3168879
Firmware Version: 05.01D05
User Capacity: 1,000,204,886,016 bytes
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: 8
ATA Standard is: Exact ATA specification draft version not indicated
Local Time is: Wed Aug 17 23:07:52 2011 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: (0x85) Offline data collection activity
was aborted by an interrupting
command from host.
Auto Offline Data Collection:
Enabled.
Self-test execution status: ( 241) Self-test routine in progress...
10% of test remaining.
Total time to complete Offline
data collection: (17400) 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: ( 201) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x3037) SCT Status 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 186 174 021 Pre-fail
Always - 3683
4 Start_Stop_Count 0x0032 100 100 000 Old_age
Always - 15
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail
Always - 0
7 Seek_Error_Rate 0x002e 200 200 000 Old_age
Always - 0
9 Power_On_Hours 0x0032 091 091 000 Old_age
Always - 7113
10 Spin_Retry_Count 0x0032 100 253 000 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 - 13
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always
- 11
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always
- 3
194 Temperature_Celsius 0x0022 115 108 000 Old_age Always
- 32
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 200 200 000 Old_age
Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always
- 0
200 Multi_Zone_Error_Rate 0x0008 200 200 000 Old_age
Offline - 0
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% 7109
-
# 2 Extended offline Completed without error 00% 7003
-
# 3 Extended offline Completed without error 00% 6837
-
# 4 Extended offline Completed without error 00% 6670
-
# 5 Extended offline Completed without error 00% 6504
-
# 6 Extended offline Completed without error 00% 6338
-
# 7 Extended offline Completed without error 00% 6173
-
# 8 Extended offline Completed without error 00% 6006
-
# 9 Extended offline Completed without error 00% 5840
-
#10 Extended offline Completed without error 00% 5674
-
#11 Extended offline Completed without error 00% 5507
-
#12 Extended offline Completed without error 00% 5340
-
#13 Extended offline Completed without error 00% 5173
-
#14 Extended offline Completed without error 00% 5007
-
#15 Extended offline Completed without error 00% 4841
-
#16 Extended offline Completed without error 00% 4675
-
#17 Extended offline Completed without error 00% 4510
-
#18 Extended offline Completed without error 00% 4344
-
#19 Extended offline Completed without error 00% 4179
-
#20 Extended offline Completed without error 00% 4012
-
#21 Extended offline Completed without error 00% 3847
-
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.
--
Thomas
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