[AusNOG] Global switch Level 4 Hard disk's

Sun Jan 19 20:47:15 EST 2014

I was provided a copy of this article from IBM’s Global Technology Services
(see link below), which again outlines the link between acoustic noise and
HDD damage:

http://www.datacenterjournal.com/it/inert-gas-data-center-fire-protection-and-hard-disk-drive-damage/

Kind Regards

Tony de Francesco
Technical Director

P.U.E. Pty Ltd

*From:* AusNOG [mailto:ausnog-bounces at lists.ausnog.net] *On Behalf Of *Joseph
Goldman
*Sent:* Tuesday, 14 January 2014 8:45 AM
*To:* ausnog at lists.ausnog.net
*Subject:* Re: [AusNOG] Global switch Level 4 Hard disk's

I'm guessing here - but I would assume the use of this kind of gas
suppression system is a selling point for Global Switch to the point of it
isn't harmful to your electronics - saving your equipment if it is not in
the direct path of the fire.

Given that 'selling point' has failed, I would imagine it'd come under
Global Switches liability?

This again assuming that GS use this as a selling point over other DC's
(such as Equinix ) that dump the foam and ruin everyone's hardware.

On 14/01/14 08:41, Matt Perkins wrote:

A good question. I would think it would be covered under equipment
breakdown policy. As there was no fire. I would think most people would not
be insured for this sort of thing.  It's a good question for your broker.

Matt

On 14/01/14 6:41 AM, Alex Samad - Yieldbroker wrote:

Question

Who pays for this ? If you were in the suite and lost 20-40 drives, would
insurance cover it and if not do you have any claim on GS if it was done in
error. Or is it a case of you know the risks, buyer beware.

Curious

Alex

*From:* AusNOG [mailto:ausnog-bounces at lists.ausnog.net<ausnog-bounces at lists.ausnog.net>]
*On Behalf Of *James Braunegg
*Sent:* Monday, 13 January 2014 10:19 PM
*To:* John Edwards; ausnog at lists.ausnog.net
*Subject:* Re: [AusNOG] Global switch Level 4 Hard disk's

Dear All

I’d love to know if any Server or Storage Vendors have any meantime to
failure reports based on exposure to different fire suppression systems,
very interesting Read / Topic !!!

Kindest Regards

*James Braunegg**P:*  1300 769 972  |  *M:*  0488 997 207 |  *D:*  (03)
9751 7616

*E:*   james.braunegg at micron21.com  |  *ABN:*  12 109 977 666
*W:*  www.micron21.com/ip-transit   *T:* @micron21

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-----Original Message-----
From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net<ausnog-bounces at lists.ausnog.net>]
On Behalf Of John Edwards
Sent: Monday, January 13, 2014 10:06 PM
To: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Global switch Level 4 Hard disk's

On 13 Jan 2014, at 2:00 pm, Brad Gould <bradley at internode.com.au> wrote:

> Sudden pressure increase or temperature drop with a gas dump?

>

I’m with Brad,

Gas expansion is an endothermic process.

The temperature will drop significantly - more than you could effect with a
block of ice. In a data centre, the air temp will be back to normal in one
cycle, so humans may not notice the difference.

Disks are spinning at 10K rpm, operating at 55 degrees. It’s not surprising
that they would fail with a sudden drop in temperature. 3.5” SATA drives
are going to be hit harder than 2.5” SAS drives, simply because they are
bigger and will contract further.

Pressure increase on a gas drop will be negligible, and most hard drives
are effectively sealed anyway.

Someone hit a hot hard drive performing a transfer with a CO2 fire
extinguisher, and let us know the result :)

John

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