Yahoo Gmail Google Facebook Delicious Twitter Reddit Stumpleupon Myspace Digg

Search queries

docmd.close 2585, WWWXXXAPC, WWWXXXDOCO, nu vot, dhcpd lease file "binding state", WWWXXXDOCO, how to setup procmail to process html2text, how to setup procmail html2text, WWWXXXAPC., XXXCNZZZ



#1: Interpreting SMART output

Posted on 2010-06-10 23:59:03 by Alex

Hi all,

I was using rsync to copy a very large file (95GB kvm Linux host
image) on the same filesystem to make a backup, and it was taking a
much longer time than it should have. The system was otherwise
completely idle. The time, as shown from --progress, would fluctuate
from 50 minutes to three hours, and never really settle on a steady
time. It would copy between 8MB/s and 30MB/s during the copy. The kvm
image was on a RAID5 filesystem with three disks, all the same.

iostat would show it was reading about 20MB/s then would go to nearly
0, then back to 20MB/s, and also would show that the transfer speed
would fluctuate.

Is this to be expected? It got me thinking that the disks are a few
years old now, and perhaps are on the verge of failure? I'm not sure I
can properly interpret the SMART output, though. It passed a short
test, but the disks have 18439 hours on them!

Here is the SMART output for one of the disks:

It appears to show quite a few errors, but none of them have exceeded
the threshold:
7 Seek_Error_Rate 0x000f 085 060 030 Pre-fail
Always - 354385893

Does hardware ECC affect performance?
195 Hardware_ECC_Recovered 0x001a 071 053 000 Old_age
Always - 209030577

Thanks for any ideas.
To unsubscribe from this list: send the line "unsubscribe linux-admin" in
the body of a message to
More majordomo info at

Report this message