On 24.12.2021 20:31, rhkra...@gmail.com wrote:
...
/dev/sdb is an HDD (which holds my "user data").
Should I be worried?
root@s19:~# smartctl -A /dev/sdb | grep -E '5 Realloc|183 Runtime|197
Current|199 UDMA'
5 Reallocated_Sector_Ct 0x0032 100 100 000 Old_age Always
- 12
root@s19:~#
Attribute #5 shows if the drive in question ever encountered and
successfully remapped a 'bad block'. In your case it happened at least
12 times.
They could've happen a few years ago, drive's firmware recovered from
them and it was working fine ever since¹.
But they also could've happen recently within a few days and in that
case the drive is failing and should be replaced ASAP.
For future investigation you should see full output of:
# smartctl -A /dev/sdb
And also SMART logs, to see when was last media error encountered:
# smartctl -l error /dev/sda
For now one thing is certain, your HDD had media errors, is not
reliable² and you should have a good backup of data from it.
It's good idea to configure 'smartd' on all hosts to monitor health
state of your drives and notify you by mail if something happened.
¹ I have a 320GB HDD for a five years with, I think, contaminated
platter. When it tries to read from some LBA range it fails with media
errors, but if I request to read past that LBA range it works fine.
As a workaround, I've repartitioned it effectively cutting off that
faulty LBA range (around 50GB) and use it as a portable drive to carry
some not important data and to store additional backup copies.
I always expect it to die, but it still works fine to this day.
² Any hardware, despite being new or old, could fail at any time. Always
expect failure and have a good backup.
--
With kindest regards, Alexander.
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