I have a 2TB HDD that I had installed on a machine as dual-boot. Windows 10 soon got all wonky despite RHEL 8 ran beautifully. I ran a read only disk test program and about 1/2 hour in it began accumulating read errors - a lot of them. I cancelled the test and swapped the drive for (2) 1TB drives to get the machine built & running properly.
Incidentally, smartdrive reported this Seagate as old age/pre-fail and a run time of 1 month 29 days, but all results were OK. (Old age boggles my mind, but that's a digression).
I took that problematic drive, plugged in into another RHEL box and ran "dd if=/dev/zero of=/dev/sdc bs=1M status=progress;sync" and. as expected, it took several hours to complete. And THAT it did - without error!
Is it possible that the 'dd' zeroing of the drive correctly marked bad sectors as bad - so the good areas are left? I'll probably shelve the drive for use in another non-critical machine build and was wondering in advance how much trouble I ought expect.
Thank you.
Curiosity question about hdd
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- Location: Central New York, USA
Re: Curiosity question about hdd
Drives come out of the factory with a number of spare sectors that are reserved for replacing ones that go bad. When they get a read error on a bad sector they mark the sector as bad (check the smartctl -a output for Current_Pending_Sector, Offline_Uncorrectable and Reallocated_Event_Count). A sector that's marked as "Pending" will get replaced with one from the spare area next time it is written to. So, yes, it may appear that it has fixed the problem but you should keep an eye on it and see if other sectors get marked as pending/uncorrectable - perhaps kick off a dd from the drive to /dev/null and let it run and see if anything new appears.Is it possible that the 'dd' zeroing of the drive correctly marked bad sectors as bad - so the good areas are left? I'll probably shelve the drive for use in another non-critical machine build and was wondering in advance how much trouble I ought expect.
And the description of the field Power_On_Hours is always "Old_age/Always", it doesn't change. What's important there is the value showing how many hours it's been powered on.
If the drive is under warranty then I'd be tempted to try to exchange it now rather than wait.
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke
Re: Curiosity question about hdd
You could also try this: badblocks -svw /dev/sdX
Could possibly be a bad cable or connectors.
Edit: What does smartctl -a /dev/sdX show about
Reallocated_Sector_Ct?
Could possibly be a bad cable or connectors.
Edit: What does smartctl -a /dev/sdX show about
Reallocated_Sector_Ct?
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- Posts: 1522
- Joined: 2014/05/21 20:16:00
- Location: Central New York, USA
Re: Curiosity question about hdd
I shall plug it back in later and check. Thank you.Edit: What does smartctl -a /dev/sdX show about
Reallocated_Sector_Ct?
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EDIT:
Code: Select all
$ sudo smartctl -a /dev/sdc
smartctl 7.1 2020-04-05 r5049 [x86_64-linux-4.18.0-305.3.1.el8_4.x86_64] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Seagate Barracuda Green (AF)
Device Model: ST2000DL003-9VT166
Serial Number: 5YD7WMKB
LU WWN Device Id: 5 000c50 03ce5f783
Firmware Version: CC32
User Capacity: 2,000,398,934,016 bytes [2.00 TB]
Sector Size: 512 bytes logical/physical
Rotation Rate: 5900 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 4
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Sun Jun 13 08:02:24 2021 EDT
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: (0x82) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Enabled.
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: ( 612) 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: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 336) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x30b7) SCT Status supported.
SCT Feature Control supported.
SCT Data Table 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 111 099 006 Pre-fail Always - 41144184
3 Spin_Up_Time 0x0003 095 092 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 226
5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 072 060 030 Pre-fail Always - 19083580
9 Power_On_Hours 0x0032 099 099 000 Old_age Always - 1465
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 120
183 Runtime_Bad_Block 0x0032 099 099 000 Old_age Always - 1
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 100 097 000 Old_age Always - 8590065765
189 High_Fly_Writes 0x003a 100 100 000 Old_age Always - 0
190 Airflow_Temperature_Cel 0x0022 080 065 045 Old_age Always - 20 (Min/Max 20/20)
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 - 129
193 Load_Cycle_Count 0x0032 100 100 000 Old_age Always - 226
194 Temperature_Celsius 0x0022 020 040 000 Old_age Always - 20 (0 15 0 0 0)
195 Hardware_ECC_Recovered 0x001a 015 009 000 Old_age Always - 41144184
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 - 1468 (56 67 0)
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 316945230
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 1471296060
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 Extended offline Aborted by host 90% 1447 -
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.