I think I remember hearing that you have the most disk failures at the beginning of the disks life.
-----Original Message----- From: Clawson, Simon [mailto:simon_clawson@mentorg.com] Sent: Wednesday, November 13, 2002 8:36 AM To: 'toasters@mathworks.com' Subject: Seagate Cheetah 36Gb disk failures
Hi,
I have had to replace two of our 36Gb Seagate Cheetah disks in the last 3 months. This is on a shelf that's just over a year old. Has anyone else noticed these disks fail regularly?
Simon
Simon Clawson TEL:- +44 (0)1635 811409 HDL Designer Series Team Systems Administrator FAX:- +44 (0)1635 810108 Mentor Graphics Ireland Ltd (UK Branch) MOB:- +44 (0)7788 716071 Rivergate London Road Newbury Berkshire RG14 2QB
On Wed, Nov 13, 2002 at 12:06:41PM -0500, Daniel Finn wrote: | I think I remember hearing that you have the most disk failures at the | beginning of the disks life.
Actually, you have all disk failures at the end of the disk's life. :-)
I think you're referring to the so called "bathtub curve" failure rate (named for the shape of the graph), where it's generally observed that the failure rate is high at the start and end of the expected disk life. Here's a hokey ASCII graph:
failure |* *| rate |* *| | * * | | ********************** | 0 |--------------------------- 0 age of unit Age
Luke.
-- Luke Mewburn lukem@wasabisystems.com http://www.wasabisystems.com Luke Mewburn lukem@netbsd.org http://www.netbsd.org Wasabi Systems - NetBSD hackers for hire NetBSD - the world's most portable UNIX-like operating system
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