Mailing List Archive

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

Yeah, we had 1 or 2 36G fail within about 3-6 months.

No big deal, NetApp had replacements on the way within a few hours.

Aaron

-----Original Message-----
From: Daniel Finn [mailto:DFinn@studentadvantage.com]
Sent: Thursday, November 14, 2002 4:07 AM
To: 'Clawson, Simon'; 'toasters@mathworks.com'
Subject: RE: Seagate Cheetah 36Gb disk failures

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

Simon,

We have a lot of SUN machines here. (SF880, 480, 280, SB1000, SB2000).
Sun Support recommended us to upgrade the firmware of all SEAGATE disks fc
of 36GB and 72GB, because an Sun internal technote notice that due to an
electrostatic problem, a disk could lose his label, so crash...

They recommend us to upgrade the firmware of all Seagate fc disks with the
following reference :

ST 373405fc 72GB
ST 336605fc 36GB

May be you could contact Seagate for more informations.

Hope this information could help you to solve your issue.

Regards
Eric VIANO


-----Original Message-----
From: Daniel Finn [mailto:DFinn@studentadvantage.com]
Sent: Wednesday, November 13, 2002 6:07 PM
To: 'Clawson, Simon'; 'toasters@mathworks.com'
Subject: RE: Seagate Cheetah 36Gb disk failures

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