Study says failure rates 15 times that of what manufacturers indicate

jmke · 11th March 2007, 12:37

A study released this week by Carnegie Mellon University revealed that hard drive manufacturers may be exaggerating their mean-time before failure (MTBF) ratings on hard drives. In fact, researchers at Carnegie indicated that on the average, failure rates were as high as 15 times the rated MTBFs

http://www.dailytech.com/article.aspx?newsid=6404

jmke · 11th March 2007, 12:38

Quote:

In fact, researchers indicated that drive operating temperatures had little to no effect on failure rates -- a cool hard drive survived no longer than one running hot.

interesting...

11th March 2007, 14:08

ot they just quoted the google results

but the important thing is this:

In our data sets, the replacement rates of SATA disks are not worse than the replacement rates of SCSI or FC disks. This may indicate that disk-independent factors, such as operating conditions, usage and environmental factors affect replacement rates more than component specific factors.

jmke · 11th March 2007, 14:22

people don't buy SCSI/FC disk for lower replacements, they are already running in RAID 5 at least, with support contracts to swap the disks without cost if one breaks down.

11th March 2007, 21:21

Quote:

Originally Posted by Rutar

ot they just quoted the google results

but the important thing is this:

In our data sets, the replacement rates of SATA disks are not worse than the replacement rates of SCSI or FC disks. This may indicate that disk-independent factors, such as operating conditions, usage and environmental factors affect replacement rates more than component specific factors.

As I recall the Google results differed a good bit in some areas, especially in regards to temperatures.

jmke · 11th March 2007, 21:55

google results indicate lower temps give higher failure...
Massive Google hard drive survey

11th March 2007, 12:37	#1
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 78,560	Study says failure rates 15 times that of what manufacturers indicate A study released this week by Carnegie Mellon University revealed that hard drive manufacturers may be exaggerating their mean-time before failure (MTBF) ratings on hard drives. In fact, researchers at Carnegie indicated that on the average, failure rates were as high as 15 times the rated MTBFs http://www.dailytech.com/article.aspx?newsid=6404 __________________

11th March 2007, 14:22	#4
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 78,560	people don't buy SCSI/FC disk for lower replacements, they are already running in RAID 5 at least, with support contracts to swap the disks without cost if one breaks down. __________________

11th March 2007, 21:55	#6
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 78,560	google results indicate lower temps give higher failure... Massive Google hard drive survey __________________

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11th March 2007, 14:08	#3
Rutar Posts: n/a	ot they just quoted the google results but the important thing is this: In our data sets, the replacement rates of SATA disks are not worse than the replacement rates of SCSI or FC disks. This may indicate that disk-independent factors, such as operating conditions, usage and environmental factors affect replacement rates more than component specific factors.