[mythtv-users] Playback drops with news crawl
Stephen Worthington
stephen_agent at jsw.gen.nz
Sat Feb 15 16:13:33 UTC 2025
On Sat, 15 Feb 2025 09:08:19 -0600, you wrote:
>
>Hi Will!
>
>>> It sounds like a disk drive error if the file copy fails at that point.
>>> If the file copy fails there is not much chance that MythTV could read
>>> past that point. I recommend replacing the drive. Copy as much as you
>>> can from the old drive to the new drive.
>> Easy to check by installing smartmontools and running:
>> sudo smartctl -adev<device> (e.g. /dev/sda)
>>
>> It might be obvious that it's dying, or if not, I'm sure somebody here
>> could provide some insight if you paste the input here.
>
>
>I'm guessing with all the 'old-age' and 'pre-fails' in the output and
>the drive is around ten years old Peter's suggestion to replace it is
>probably a good one. ...When putting together this new Backend I sort
>of grabbed the first about-the-right-size drive I saw in the box and
>didn't even look at the date - oops!
>
>
>Anyway, below are the test results. I'm thinking your comments would be
>a great way for me and the rest of the readers to learn. I'm also
>thinking it might be a good idea for me to create a script to look at
>the smartctl results to monitor the hard drives in the various computers
>around here and so catch any problems early. So the sub-question is
>which items should I be monitoring?
>
><start of test results>
>
>barry at BE5:~$ sudo smartctl -a /dev/sdb
>smartctl 7.4 2023-08-01 r5530 [x86_64-linux-6.8.0-51-generic] (local build)
>Copyright (C) 2002-23, Bruce Allen, Christian Franke, www.smartmontools.org
>
>=== START OF INFORMATION SECTION ===
>Model Family: Western Digital Re
>Device Model: WDC WD4000FYYZ-05UL1B0
>Serial Number: WD- <BJM: Deleted>
>LU WWN Device Id: 5 0014ee 25f977da3
>Firmware Version: 00.0NS05
>User Capacity: 4,000,787,030,016 bytes [4.00 TB]
>Sector Size: 512 bytes logical/physical
>Rotation Rate: 7200 rpm
>Device is: In smartctl database 7.3/5528
>ATA Version is: ATA8-ACS (minor revision not indicated)
>SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
>Local Time is: Sat Feb 15 08:25:13 2025 CST
>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: (48480) 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: ( 523) minutes.
>Conveyance self-test routine
>recommended polling time: ( 5) minutes.
>SCT capabilities: (0x70bd) 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 200 182 051 Pre-fail
>Always - 15
> 3 Spin_Up_Time 0x0027 227 227 021 Pre-fail
>Always - 7633
> 4 Start_Stop_Count 0x0032 100 100 000 Old_age
>Always - 90
> 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 065 065 000 Old_age
>Always - 26111
> 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 - 90
> 16 Total_LBAs_Read 0x0022 003 197 000 Old_age
>Always - 189260942824
>183 Runtime_Bad_Block 0x0032 100 100 000 Old_age
>Always - 0
>192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age
>Always - 50
>193 Load_Cycle_Count 0x0032 200 200 000 Old_age
>Always - 39
>194 Temperature_Celsius 0x0022 112 093 000 Old_age
>Always - 40
>196 Reallocated_Event_Count 0x0032 200 200 000 Old_age
>Always - 0
>197 Current_Pending_Sector 0x0032 200 200 000 Old_age
>Always - 8
>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
>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 Aborted by host 10% 20981 -
>
>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.
>
>The above only provides legacy SMART information - try 'smartctl -x' for
>more
>
><end of test results>
>
>The replacement drive has been ordered: for $10 more I got a 6 TB over 4
>TB WD6004FZBX: 256 MB cache (seems more is better), 7200 RPM, (seems
>less of a bottleneck possibility that the 5400 RPM versions), 5 year
>warranty (seems if the manufacturer stands behind their product for a
>longer time), Transfer Rate up to 267 Mbps (faster is better, though is
>it reading or writing....). SSDs and NVMe's are faster but I'm not a fan
>of when they fail they take everything. OTOH I do back up my hard
>drives.......
>
>
>Thanks!
>
>Barry
>
The "Old_age" and "Pre-fail" column just tells you the type of the
SMART attribute, not that it is in a failing state. The data value at
the end of each attribute line is what matters. So that drive is not
in too bad shape actually. A Pending sector is a sector the drive
wants to remap as it is failing. It will remap it next time it is
written to, marking the bad sector as not to be used and putting an
entry in its remapping table pointing to a hidden spare sector to be
used instead. So 8 Pending sectors is a problem, but they would
likely go away if you do a full format of the drive where it does
writes to all sectors, or if you manually write to each pending
sector. That would use up 8 of the remaining spare sectors on the
drive, but it should have over a 100 spares, possibly more than 300.
But apart from that, none of the other SMART values are saying there
is a problem. It has only been powered on for 3 years - I have had
drives running 24/7 for over 10 years without failing. And it is
supposed to be an enterprise class drive, with a 5 year warranty, so
it should have been able to be run for over 5 years, 24/7.
My policy for drives with pending sectors is to replace them. I copy
all the data to the new drive, which can be a bit problematical as any
pending sectors may not be readable. Then I do a full write format on
the old drive and if it is clean after that, it goes on a pile of
drives used for test machines or emergencies where I need another
drive quickly. I have had a couple of drives with pending sectors get
put back in service like that and run on for a number of years. And I
have had one that I did that to where a couple of weeks later it was
developing more and more pending sectors, so I binned it.
More information about the mythtv-users
mailing list