Re: [CentOS] Noise Cancellation of Server Noise

2017-01-01 Thread Sorin Srbu
> -Original Message- > From: CentOS [mailto:centos-boun...@centos.org] On Behalf Of John R Pierce > Sent: den 24 december 2016 23:18 > To: centos@centos.org > Subject: Re: [CentOS] Noise Cancellation of Server Noise > > On 12/24/2016 1:57 PM, Digimer wrote: >

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-26 Thread John R Pierce
On 12/26/2016 3:31 AM, geo.inbox.ignored wrote: fine looking box. oem, model? thats a SuperMicro SC846 storage server chassis (36 x 3.5" SAS drives in a 4U) with a dual xeon x5650 motherboard. I just used the picture cuz I had it handy and its typical of a rack mount server, big array of

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-26 Thread H
On December 25, 2016 2:49:25 AM EST, "geo.inbox.ignored" wrote: > > >On 12/24/2016 10:25 PM, John R Pierce wrote: ><> > >> he said 'server rack'.thats a probably 6' tall cabinet filled >with >> servers, each of which has likely dozens of high speed fans. >> >}}

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-26 Thread H
On December 24, 2016 4:50:58 PM EST, John R Pierce wrote: >On 12/24/2016 1:43 PM, H wrote: >> Has anyone come across a device that could cancel out the noise from >servers, ie. the fan noise? I have a server rack near my office and >would like to see if i can decrease the

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-26 Thread Valeri Galtsev
On Mon, December 26, 2016 9:51 am, Valeri Galtsev wrote: > > On Mon, December 26, 2016 12:16 am, geo.inbox.ignored wrote: >> >> >> On 12/25/2016 09:25 PM, Always Learning wrote: >>> On Sun, 2016-12-25 at 13:38 -0600, geo.inbox.ignored wrote: On 12/25/2016 11:53 AM, Mark Woolfson (Notebook)

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-26 Thread Valeri Galtsev
On Mon, December 26, 2016 12:16 am, geo.inbox.ignored wrote: > > > On 12/25/2016 09:25 PM, Always Learning wrote: >> On Sun, 2016-12-25 at 13:38 -0600, geo.inbox.ignored wrote: >>> On 12/25/2016 11:53 AM, Mark Woolfson (Notebook) wrote: If the server decision makers had not gone for a server

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-26 Thread Valeri Galtsev
On Mon, December 26, 2016 12:22 am, geo.inbox.ignored wrote: > > > On 12/25/2016 09:45 PM, Luigi Rosa wrote: > <<>> > >> The other kind of server is sold both in "tower" and rack form factor; I personally do not consider these tower machines put sideways rackmount servers. Such tower machine is

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-26 Thread Valeri Galtsev
On Mon, December 26, 2016 12:31 am, John R Pierce wrote: > On 12/25/2016 10:22 PM, geo.inbox.ignored wrote: >> there is a very easy way to change fix to variable speed. BTDT. > > in a rack server with arrays of fans in hotswap sliders inside the > server that plug directly into the power

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-26 Thread Luigi Rosa
geo.inbox.ignored wrote on 26/12/2016 07:22: not totally true. there is a very easy way to change fix to variable speed. BTDT. 1U and 2U HP/Dell servers use variable speed fans, you hear them at full speed when you power the server on. The problem is that the noise of an "idle" 1U or 2U

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-26 Thread geo.inbox.ignored
On 12/26/2016 12:31 AM, John R Pierce wrote: > On 12/25/2016 10:22 PM, geo.inbox.ignored wrote: >> there is a very easy way to change fix to variable speed. BTDT. > > in a rack server with arrays of fans in hotswap sliders inside the > server that plug directly into the power distribution

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-25 Thread John R Pierce
On 12/25/2016 10:22 PM, geo.inbox.ignored wrote: there is a very easy way to change fix to variable speed. BTDT. in a rack server with arrays of fans in hotswap sliders inside the server that plug directly into the power distribution board? example:

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-25 Thread geo.inbox.ignored
On 12/25/2016 09:45 PM, Luigi Rosa wrote: <<>> > The other kind of server is sold both in "tower" and rack form factor; > they are bigger the airflow is forced by bigger fans that can turn to a > lower speed to exchange the heat. > > If the noise is produced by the rack fans, use, as someone

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-25 Thread geo.inbox.ignored
On 12/25/2016 09:25 PM, Always Learning wrote: > On Sun, 2016-12-25 at 13:38 -0600, geo.inbox.ignored wrote: >> On 12/25/2016 11:53 AM, Mark Woolfson (Notebook) wrote: >>> If the server decision makers had not gone for a server designed >>> by accountants but a server designed by engineers then

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-25 Thread Luigi Rosa
H wrote on 24/12/2016 22:43: Has anyone come across a device that could cancel out the noise from servers, ie. the fan noise? I have a server rack near my office and would like to see if i can decrease the noise level. It would seem to me that the steady drone of the fans could be cancelled

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-25 Thread Always Learning
On Sun, 2016-12-25 at 13:38 -0600, geo.inbox.ignored wrote: > On 12/25/2016 11:53 AM, Mark Woolfson (Notebook) wrote: > > If the server decision makers had not gone for a server designed > > by accountants but a server designed by engineers then you would > > not have this problem. > maybe

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-25 Thread SternData
Google "server room active noise cancellation" On 12/24/2016 03:43 PM, H wrote: > Has anyone come across a device that could cancel out the noise from servers, > ie. the fan noise? I have a server rack near my office and would like to see > if i can decrease the noise level. It would seem to

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-25 Thread geo.inbox.ignored
On 12/25/2016 11:53 AM, Mark Woolfson (Notebook) wrote: > If the server decision makers had not gone for a server designed > by accountants but a server designed by engineers then you would > not have this problem. > }} maybe accountants in U.K., not is U.S.A.. accountants in U.S.A. only

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-25 Thread Mark Woolfson (Notebook)
: geo.inbox.ignored Sent: Sunday, December 25, 2016 7:49 AM To: centos@centos.org Subject: Re: [CentOS] Noise Cancellation of Server Noise On 12/24/2016 10:25 PM, John R Pierce wrote: <> he said 'server rack'.thats a probably 6' tall cabinet filled with servers, each of which has

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-24 Thread geo.inbox.ignored
On 12/24/2016 10:25 PM, John R Pierce wrote: <> > he said 'server rack'.thats a probably 6' tall cabinet filled with > servers, each of which has likely dozens of high speed fans. > }} true. i was thinking 'old school' slide drawer racks. because i doubt that 'it' or 'heads of authority'

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-24 Thread John R Pierce
On 12/24/2016 5:24 PM, geo.inbox.ignored wrote: temperature regulated fan speed can reduce noise. use of a baffle box with styrofoam or thin foam rubber lining. -+-+ fan \/ | | /\ | | --+-+--- ^ ^ baffles spacing between

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-24 Thread geo.inbox.ignored
On 12/24/2016 03:43 PM, H wrote: > Has anyone come across a device that could cancel out the noise > from servers, ie. the fan noise? I have a server rack near my > office and would like to see if i can decrease the noise level. > It would seem to me that the steady drone of the fans could be >

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-24 Thread Dave Stevens
Quoting Digimer : On 24/12/16 04:43 PM, H wrote: Has anyone come across a device that could cancel out the noise from servers, ie. the fan noise? I have a server rack near my office and would like to see if i can decrease the noise level. It would seem to me that the

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-24 Thread Digimer
On 24/12/16 05:18 PM, John R Pierce wrote: > On 12/24/2016 1:57 PM, Digimer wrote: >> There are rack chassis designed to reduce noise. An example are the APC >> NetShelter CS line. >> >> http://www.apc.com/shop/ca/en/categories/racks-and-accessories/racks-and-enclosures/netshelter-cx/_/N-1ks6cn2

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-24 Thread John R Pierce
On 12/24/2016 1:57 PM, Digimer wrote: There are rack chassis designed to reduce noise. An example are the APC NetShelter CS line. http://www.apc.com/shop/ca/en/categories/racks-and-accessories/racks-and-enclosures/netshelter-cx/_/N-1ks6cn2 wow, $9100 for the 38U rack.thats pricey... and

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-24 Thread Digimer
On 24/12/16 04:43 PM, H wrote: > Has anyone come across a device that could cancel out the noise from servers, > ie. the fan noise? I have a server rack near my office and would like to see > if i can decrease the noise level. It would seem to me that the steady drone > of the fans could be

Re: [CentOS] Noise Cancellation of Server Noise

2016-12-24 Thread John R Pierce
On 12/24/2016 1:43 PM, H wrote: Has anyone come across a device that could cancel out the noise from servers, ie. the fan noise? I have a server rack near my office and would like to see if i can decrease the noise level. It would seem to me that the steady drone of the fans could be

[CentOS] Noise Cancellation of Server Noise

2016-12-24 Thread H
Has anyone come across a device that could cancel out the noise from servers, ie. the fan noise? I have a server rack near my office and would like to see if i can decrease the noise level. It would seem to me that the steady drone of the fans could be cancelled out to a large extent.