Todd Zullinger wrote:
Konstantin Svist wrote:
Was just reading the same article. The bug description mentions that
you can check your HD's S.M.A.R.T. attributes with a command like
smartctl -d ata -a /dev/sda
Mine says something in the order of 300k, half the lifespan of the
drive :(
Where did you find the lifespan info for your drive? And how are you
sure that you're reading the raw value from smartctl properly? The
smartctl man page says this:
193,loadunload - Raw Attribute number 193 contains two values. The
first is the number of load cycles. The second is the number of
unload cycles. The difference between these two values is the
number of times that the drive was unexpectedly powered off (also
called an emergency unload). As a rule of thumb, the mechanical
stress created by one emergency unload is equivalent to that
created by one hundred normal unloads.
The output of smartctl on my laptop looks like this:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
193 Load_Cycle_Count 0x0032 044 044 000 Old_age Always - 569146
I really can't be sure what that raw value means. It's not clear if I
should be reading that as one value (569,146) or two (569 and 146) or
if that raw value needs to be parsed in some other way to turn it into
something useful for human consumption.
Some of the folks in #fedora-devel were similarly unsure. I'm not
going to worry myself until I have more information on how to properly
read the smart data. If you know of a good source for that info,
please pass it on.
So far, I think it's a lot of worry for nothing.
Oh, I see...
I just assumed that the RAW_VALUE will have the actual number of load
cycles :P
As for the lifespan of the drive - there's a helpful link on the page I
mentioned in my last email. Here's the link:
http://www.seagate.com/docs/pdf/datasheet/disc/ds_momentus7200.pdf
It says my drive is rated for 600k load cycles. This number is achieved
by statistical measurements.. so it's fairly close to the actual
lifespan of the drive. Of course if the raw value doesn't correspond,
there's no comparison :)
Oh, and my value of load_cycle_count:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE
UPDATED WHEN_FAILED RAW_VALUE
193 Load_Cycle_Count 0x0032 001 001 000 Old_age
Always - 352715
