Most of the time, Gnome Disk Utility and motherboard RAID systems are
showing a disk as "officially not OK anymore" around something like 500
reallocated sectors (which is already very big).
But SMART "Normalized", "Worst", "Threshold" values are quite
complicated to understand (it may be some easy way to translate them
into something clear?) so I don't know what is the official "failure" value.
I don't know how many reserved sectors for reallocation are existing on
most drives, but there is some bits of information here about spare
sectors area size:
https://www.passmark.com/forum/general/4257-detrmining-the-size-of-the-sector-spare-area
It seems that you can calculate and see how many sectors aren't
available for data, so that most of them are probably the "spare sectors
pool".
Anyway, after more than 1800+ reallocated sectors, by experience, it's
time to thank your disk one last time, to turn it off, and to let him go
to hard disk's heaven! The drive is living its really last hours, it may
die during the night.
Le 09/05/2019 à 01:19, Roy Sigurd Karlsbakk a écrit :
On 9/5/19 7:41 am, Roy Sigurd Karlsbakk wrote:
Hi
I'm monitoring this box and it seems ID 5 Reallocated Sectors Count (from SMART)
is climbing frantically on one disk. It's a r6 so it shouldn't be much of an
issue once the disk eventually fails, but does anyone out there know how many
reallocated sectors you can have on a drive? This is an older 1TB ST31000524NS
My rule, and what is often suggested in raid documents, is that once the number
start to visibly climb (you say 'frantically') I replace the disk.
That's more or less my understanding of it as well. The question was more of a theoretical question: How many sectors can it reallocate before theey start to go "pending"?
As for the growth, at May 7 19:42 CEST, reallocated sectors were 53. When this email was posted, it was 1812. Currently it's at 1883, so it's still climbing rapidly. Pending is till zero. This shows the numbers over the day for reallocated sectors (the dots in front was before I turned up the check frequency and zabbix 3.4 apparently isn't smart enough to draw the graph for them there) https://karlsbakk.net/tmp/reallocated-sectors-hba-skrothaug.png
Vennlig hilsen
roy
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Roy Sigurd Karlsbakk
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http://blogg.karlsbakk.net/
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