Kursun :
The most reliable HD had failure rate of %10? Nonsense.
Nonsense ? From the storage review site:
"23,343 readers have entered results for their experiences with a total of 50,276 drives" .
I've had over 30 HDs. Not one of them failed. They were just retired because of inadequate capacity.
Ya might as well say that ya bought over 30 quarts of milk and none of them went bad. They just disappeared cause you drank them (before they went bad).
Don't believe everything you read on the internet.
You apparently missed the part where it mirrors my own experience in 68 builds, over 120 hard drives(or about 4 times your data set). I don't retire drives, I use them as backups. You aslo skipepd what's been written in the many other threads here on the forum
Proper research requires checking numerous sources and getting confirmation. I've done that. To get some perspective, you might read some industry research papers which were published and appeared in peer reviewed trade journals. Let's start here:
http://labs.google.com/papers/disk_failures.html
Failure Trends in a Large Disk Drive Population
Eduardo Pinheiro, Wolf-Dietrich Weber and Luiz Andr´e Barroso
Google Inc.
1600 Amphitheatre Pkwy
Mountain View, CA 94043
Now I don't think you will find many outfits that purchase more HD's than the peeps who run Google's server farms.
Take note of page 4 which shows AFR (Average failure rates) as follows:
3 month AFR 3%
6 month AFR 2%
1 year AFR 2 %
1 year cumulative (7%)
2 year AFR 8%
2 year cumulative (15%)
3 year AFR 9%
3 year cumulative (24%)
4 year AFR 6 %
4 year cumulative (30 %)
5 year AFR 7 %
5 year cumulative (37%)
You will see the same thing here:
http://www.cs.cmu.edu/~bianca/fast07.pdf
As is summarized here:
http://www.allthingsdistributed.com/2007/02/on_the_reliability_of_hard_dis.html
"Both papers report disk failure rates in the 6%-10% range: in a datacenter with about 100,000 disks you will need to replace up to between 6,000 and 10,000 disks per year."
Again, that is
per year ! So after 1 year, you are replacing 6 -10%, by the 2nd year, you have replaced 12-20%, 3rd year 18-30% ..... 5 years 30-50%.
Let's look at some print mags now:
http://www.pcworld.com/article/id,129558/article.html
"Customers replace disk drives 15 times more often than drive vendors estimate, according to a study by Carnegie Mellon University.
The Carnegie Mellon study examined large production systems, including high-performance computing sites and Internet services sites running SCSI, FC and SATA drives. The data sheets for those drives listed MTBF between 1 million to 1.5 million hours, which the study said should mean annual failure rates "of at most 0.88%." However, the study showed typical annual replacement rates"
So, on one hand, we have storagereview's survey with 50,000+ drives, we have google's published report with several 100,000 drives, and the Carnegie Melon report with 100,000+ drives....we have the "all things distributed" article, the PC world article...... and all of these mirror my own experience ....and then on the other hand,we have your "30 retired before they failed drives". In light of the preceding, your nonsense theory doesn't seem to have much support.