Stephen Hurd wrote:
Jeremy Chadwick wrote:
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
5 Reallocated_Sector_Ct 0x0033 253 253 063 Pre-fail
Always - 4
This shows you've had 4 reallocated sectors, meaning your disk does in
fact have bad blocks. In 90% of the cases out there, bad blocks
continue to "grow" over time, due to whatever reason (I remember reading
an article explaining it, but I can't for the life of me find the URL).
This is unusual now? I've always "known" that a small number of bad
blocks is normal. Time to readjust my knowledge again?
I have bought disks where the value of Reallocated_Sector_Ct was not 0,
at least by the time I looked at it with smartctl. Nothing bad has
happened to those disks in several years (hope that's not tempting fate).
I have always assumed that what matters is when this value *changes*.
If it's not changing, who cares? smartd will monitor disks and email
you when certain attributes change (e.g. Pre-fail attributes like
Reallocated_Sector_Ct). If it changed, it would mean that an attempt to
write data had failed and that reallocation had happened.
e.g. from smartd.conf
/dev/ad4 -o on -S on -a -m root -M daily
If your Current_Pending_Sector were non-zero you'd be in trouble, I believe.
0.02, pinch of salt, not an expert, slippery when hot, long time since I
read the specs, etc etc.
--Alex
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
