On Thu 21 May 2015 09:58:48 AM Mikael Abrahamsson wrote: > On Tue, 19 May 2015, Thomas Fjellstrom wrote: > > How many UREs are considered "ok"? Tens, hundreds, thousands, tens of > > thousands? > > I will replace any drive that have developed UNC sectors a few times, so > I'd say "less than 10". In this case, it looked like 5 UNC errors for a single sector, and some weird latency patterns, till I ran badblocks -w on it, then it gave me > 10k relocated sectors and many thousands more uncorrectable sectors. Before the badblocks test, it "looked" ok, now It's most definitely dead. > +1 on the "set kernel timeout to more than 120 seconds". I have this in > /etc/rc.local: > > for x in /sys/block/sd[a-z] ; do > echo 180 > $x/device/timeout > done > > echo 4096 > /sys/block/md0/md/stripe_cache_size I presume it's ok to do that even if the drives do ERC/TLER? Just woke up, but my brain seems to be telling me it shouldn't break anything since the ERC drives should always return after 7s no matter what... -- Thomas Fjellstrom thomas@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
