On 4/2/20 9:31 AM, Adam Goryachev wrote:
On 2/4/20 22:20, Phil Turmel wrote:
Concur. Old and worn out. Personally, I replace when reallocations
are in the 10 to 20 range. Once you get past that, they seem to start
coming much faster.
Thank you, I'll check if the drive can be replaced by warranty, or else
check if I have a spare. Otherwise, I may be forced to buy a replacement.
I'll be astonished if you can get a warranty replacement for a drive
that has 60 *thousand* hours of uptime.
So I have a "spare" drive in the array, what steps should I take to
"fix" this? Here are the statistics on the spare drive. Maybe it is just
as bad as the other two anyway, and I should replace all three?
If I can, I assume I would run some commands on the spare to configure
it to not have any BBL, then add it back to the array, use it to replace
the existing bad drive?
Use the --replace operation of modern mdadm/kernel to get that failing
drive out right away. It appears you won't be able to remove the bad
block misfeature until all devices in the array have an empty log.
Equally, all data is real-time synced to another machine (DRBD), as well
as being backed up regularly, so I'm not super concerned about the data
content, but I do want to maximise uptime, and minimise risk to the data
as it really is rather important (understatement...).
Understood. --replace is your friend.
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.19.0-8-amd64] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Western Digital RE4
Device Model: WDC WD2003FYYS-02W0B0
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
1 Raw_Read_Error_Rate POSR-K 200 200 051 - 0
3 Spin_Up_Time POS--K 253 253 021 - 7391
4 Start_Stop_Count -O--CK 100 100 000 - 72
5 Reallocated_Sector_Ct PO--CK 181 181 140 - 151
7 Seek_Error_Rate -OSR-K 200 200 000 - 0
9 Power_On_Hours -O--CK 009 008 000 - 66691
10 Spin_Retry_Count -O--CK 100 253 000 - 0
11 Calibration_Retry_Count -O--CK 100 253 000 - 0
12 Power_Cycle_Count -O--CK 100 100 000 - 62
192 Power-Off_Retract_Count -O--CK 200 200 000 - 47
193 Load_Cycle_Count -O--CK 200 200 000 - 24
194 Temperature_Celsius -O---K 116 103 000 - 36
196 Reallocated_Event_Count -O--CK 059 059 000 - 141
197 Current_Pending_Sector -O--CK 200 200 000 - 3
198 Offline_Uncorrectable ----CK 200 200 000 - 0
199 UDMA_CRC_Error_Count -O--CK 200 200 000 - 0
200 Multi_Zone_Error_Rate ---R-- 200 200 000 - 0
||||||_ K auto-keep
|||||__ C event count
||||___ R error rate
|||____ S speed/performance
||_____ O updated online
|______ P prefailure warning
Bleh. Replace this one, too.
sdb:
ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
1 Raw_Read_Error_Rate POSR-K 200 200 051 - 73
3 Spin_Up_Time POS--K 253 253 021 - 9008
4 Start_Stop_Count -O--CK 100 100 000 - 78
5 Reallocated_Sector_Ct PO--CK 200 200 140 - 0
7 Seek_Error_Rate -OSR-K 200 200 000 - 0
9 Power_On_Hours -O--CK 022 022 000 - 57426
10 Spin_Retry_Count -O--CK 100 253 000 - 0
11 Calibration_Retry_Count -O--CK 100 253 000 - 0
12 Power_Cycle_Count -O--CK 100 100 000 - 65
192 Power-Off_Retract_Count -O--CK 200 200 000 - 46
193 Load_Cycle_Count -O--CK 200 200 000 - 31
194 Temperature_Celsius -O---K 105 095 000 - 47
196 Reallocated_Event_Count -O--CK 200 200 000 - 0
197 Current_Pending_Sector -O--CK 200 200 000 - 0
198 Offline_Uncorrectable ----CK 200 200 000 - 0
199 UDMA_CRC_Error_Count -O--CK 200 200 000 - 0
200 Multi_Zone_Error_Rate ---R-- 200 200 000 - 6
sdc:
ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
1 Raw_Read_Error_Rate POSR-K 200 200 051 - 42
3 Spin_Up_Time POS--K 253 253 021 - 8441
4 Start_Stop_Count -O--CK 100 100 000 - 69
5 Reallocated_Sector_Ct PO--CK 200 200 140 - 0
7 Seek_Error_Rate -OSR-K 200 200 000 - 0
9 Power_On_Hours -O--CK 010 010 000 - 65784
10 Spin_Retry_Count -O--CK 100 253 000 - 0
11 Calibration_Retry_Count -O--CK 100 253 000 - 0
12 Power_Cycle_Count -O--CK 100 100 000 - 67
192 Power-Off_Retract_Count -O--CK 200 200 000 - 48
193 Load_Cycle_Count -O--CK 200 200 000 - 20
194 Temperature_Celsius -O---K 120 105 000 - 32
196 Reallocated_Event_Count -O--CK 200 200 000 - 0
197 Current_Pending_Sector -O--CK 200 200 000 - 0
198 Offline_Uncorrectable ----CK 200 200 000 - 0
199 UDMA_CRC_Error_Count -O--CK 200 200 000 - 0
200 Multi_Zone_Error_Rate ---R-- 200 200 000 - 2
These two are in astonishingly good condition for their age.
When you've replaced the two bad drives and returned to having a hot
spare, use --replace again on any drives that still have entries in
their bad block logs. The free up drive can than have its superblock
zeroed and added back as the spare. Rinse and repeat.
All of the above can be done on the fly, assuming you have hot-swap bays
for new drives.
When all drives are good, with empty bad block lists, stop the array and
immediately re-assemble with --update=no-bbl.
Phil
