Computer hardware is the collection of physical elements that comprise a computer system.
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1answer
50 views
HP DL360p Gen8 for low latency trading - what to upgrade? [closed]
I'm using HP DL360p Gen8 for low latency trading (but not ultra-low-latency!).
It means that i'm working in frame about "10+ microseconds" and i don't care about "1-5 microsecond" or nanoseconds.
I ...
-1
votes
1answer
41 views
Best Linux Distribution for Scientific Computing? [closed]
I recently bought a new laptop to be used for scientific research when I'm at home. The machine has Intel i7 processor with 8 cores, 4 GB of RAM, and a graphic card from Nvidia (2 GB, Ivy Bridge). The ...
0
votes
0answers
26 views
How can I decide real vs virtual cores if i need intensive calculus? [closed]
Assume that I have a computer called A with a processor that has two cores and has hyperthreading, i.e it has 2 cores with 4 threads (I understand that this can supply to 4 processes simultaneously), ...
2
votes
0answers
37 views
mdadm raid1, drive failure lost 14days worth of data?
I am rather confused. One evening I had a server which had died. I went to reboot it and noticed it was stuck on the "GRUB" boot screen. I then noticed a hard drive had failed. I put a new hard drive ...
16
votes
3answers
636 views
SSD head / cylinder / cluster details
A customer of ours makes industrial robots that run on very old, but stable, hardware and software. The only bottleneck has always been the hard drive in these moving machines. Due to constant ...
2
votes
1answer
37 views
What servers do I need to set up the following simple scenario? [duplicate]
I've founded a start-up recently and am about to add a little structure to it, regarding management, communication and data. I am a software developer and do not know any details about server ...
0
votes
1answer
36 views
Refresh a specific page in ilo 4
I use iLo 4 for my HP dl380 gen 8. I access iLo webpage using internet explorer 10. (Although I would gladly use another browser if anyone can recommend a better one for iLo access).
How can I ...
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votes
1answer
41 views
my ibm x3550 server can't find the hard drives
I recently purchased a used ibm x3550 server with two 2.5" SAS hard drives included. When I boot the server it doesn't recognise them. I get into the bios and I can't see them there. I try to install ...
0
votes
1answer
48 views
debian Read-only file system error
I logged on to my debian box and tried running some commands and I was presented with the following message.
sudo: Can't open /var/lib/sudo/username/0: Read-only file system
After doing some ...
-2
votes
0answers
45 views
Will Temperature fluctuations negativity effect the life span of my computer hardware? [closed]
I have a office currently set up in a greenhouse with a standard off the self computer. Its located in the greenhouse because that is the only space left in my house to put it. (I know its not ideal)
...
0
votes
0answers
21 views
The fastest amd opteron processor for a particular server motherboard [closed]
I have an old server without CPU, I do not know what can be the fastest processor AMD Opteron place?
Image is here http://ubuntuone.com/4jdkm1zrocbT3FLrTY6ETH
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votes
2answers
59 views
What Testing for Secondhand Servers?
I've recently bought a used rackmount 2950 server on Ebay to use for a specific project.
I'm going to be spending a lot of time on this server, so I want to try and identify any major problems before ...
0
votes
2answers
159 views
24 Port Switch versus 4 x 8 Port Switch
While prices for switches in the end-customer sector are decreasing, I found that 24 port switches are much more expensive than multiple 8 port switches with the same speed.
Are there any ...
-2
votes
0answers
23 views
Dell PowerEdge 1850 Fan Speed [closed]
I am looking for some way to adjust the fan speed of my home server. Currently they are extraordinarily loud.
There are no issues with temperature (highest the temp gets is around 60) and the fans ...
0
votes
5answers
175 views
New office cabling: should we use CAT7 or CAT6a? [closed]
We are going to do the cabling in our new office building and we are thinking to lay down 10Gbit cables since we use HP switches that come with 10Gbit ethernet ports. We will also lay down few fiber ...
0
votes
3answers
67 views
Graphing temperature over time for HP iLo 4
Server: HP DL380p Gen 8, running latest iLo 4.
One sensor, Sensor #25 for the HD Controller, tends to run a bit hot when compared to the other sensors. It tends to read 75 C. Caution temp is 100 C. ...
-2
votes
2answers
69 views
Choosing a processor for web server: what is more important, GHz or Cache size? [closed]
I'm choosing a new server that will run linux, nginx and php-fpm based web server. Mostly, all the work server is doing - rendering of Twig php templates.
Current server has the fallowing processor, ...
3
votes
1answer
104 views
How to use a switch as a network tap?
I would like to tcpdump all traffic that my router does when it makes a firmware update.
So I have taken a HP ProCurve 1800-8G switch and mirrored port 7 to port 8.
I have connected:
Internet ...
2
votes
2answers
105 views
RAID 10 — how do you know a drive is going or is bad?
I have some servers with a datacenter all the servers have RAID 10 setup. How do I know when one of the drives is going bad or is bad and needs to be replaced?
EDIT: These servers are unmnaaged and ...
-1
votes
1answer
50 views
Is this a sign of a bad drive? [closed]
smartctl --attributes --log=selftest /dev/sda
smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-379.22.1.lve1.2.17.el6.x86_64] (local build)
Copyright (C) 2002-12 by Bruce Allen, ...
3
votes
2answers
107 views
What are cables/boxes called for listening in on a RJ45 cable?
I would like to capture the traffic from a router, so I assume there must exist a cable or hardware box with 3 RJ45 socks, where two of them are IN and OUT, and the third is for capturing device (a ...
-2
votes
1answer
90 views
HP proliant microserver won't boot
I was installing an ethernet driver for VPN on an HP Microserver (on PCI 1).
Then, suddenly the server shut down while I was installing it.
When I tried to boot it back up it only shows the health ...
1
vote
1answer
73 views
Hardware Virtualization Technology Enabling Issue
I have purchased an Intel i7 3770 and an Asus P8Z77-M Pro; for some Windows Server 2012 testing.
In the BIOS I have enabled the "Intel Virtualization Technology", and have several Hyper-V based ...
3
votes
3answers
100 views
Are OTP/OATH (RFC 4226) Hardware Tokens Re-seedable?
We set up a two-factor authentication system that uses Google Authenticator to use OTP via mobile phone apps. Some of our users however don't have smart phones so we want to be able to use hardware ...
255
votes
7answers
52k views
Something is burning in the server room; how can I quickly identify what it is?
The other day, we notice a terrible burning smell coming out of the server room. Long story short, it ended up being one of the battery modules that was burning up in the UPS unit, but it took a good ...
0
votes
0answers
26 views
Computer/Server Freezes randomly [duplicate]
I have previously posted a question here that talked about my Ubuntu server freezing up.
Well I have been experimenting with all different kinds of distros of linux and it happens to all of them so ...
0
votes
1answer
24 views
hosting machine capability [duplicate]
I'm curios what's the traffic a dual-socket CPU server machine can handle?
Just hypothetical, does anybody have a clue what are the keystones?
Is it more about hardware or connection or anything else ...
8
votes
3answers
244 views
How Serviceable are Tape Drives?
I'm contemplating an auto-loading tape drive as part of a backup strategy. This would be my first experience with tape backup. The cost-effectiveness of tape drives seems to depend on the assumption ...
0
votes
2answers
68 views
IBM DS3512 Connection to IBM HS22 BladeCenter
I have a BladeCenter HS22 with 14 bladeservers. Attached to the BladeCenter I have a DS3512 storage array. I'm trying to access the DS3512 to configure it but can't manage to do it.
I have connected ...
1
vote
2answers
152 views
High number of ethernet errors. Tool for testing the ethernet card? [closed]
have an Asus Sabertooth X79.
I often get corrupted files. I checked the RAM, but memtest finds no errors. To avoid the possibility of disk errors, I tried copying files to tmpfs.
If I copy from the ...
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votes
1answer
64 views
Difference between storage and operating temperatures [closed]
What is the difference between Operating temperatue & storage temperature of switch C3560E ?
1
vote
0answers
116 views
Removing raid metadata from drives
Normally when I have a drive which contains raid metadata e.g. from fakeraid or a hardware raid card I can get rid of it with:
dmraid -r -E /dev/sdX
Or if that doesnt work, doing a simple dd ...
2
votes
1answer
50 views
May a low DRAM router be a bottleneck for a LAN?
I need to install a LAN that is a hybrid between a star LAN and a cascade LAN. There are two levels (I mean that the maximum number of link to go from the central switch to the most external switch is ...
0
votes
0answers
68 views
Possible to run Xeon Phi along side with Xeon E7? [closed]
We are trying to build some powerful workstations. We have both Xeon Phi and Xeon E7 CPUs at our hand, but I haven't been able to find a motherboard that claims to support these two CPUs ...
1
vote
1answer
75 views
How to improve poor SQL Server performance
We have a virtualized environment using VMware vSphere 5.0 U1 which hosts our Microsoft SQL Server and have very poor performance. the host server is a HP DL360 G5 with xeon X5450's, and the disk ...
2
votes
1answer
51 views
How to bind stackable switches
Let's say that I have a non modular switch, and that in future I might need to expand my LAN, connecting it to more switches. If I take stackable switches, physically how do I bind them? May I take a ...
1
vote
2answers
105 views
Clear the fault LED on an IBM x3650 M4 after accidental disk insertion and removal?
The server had a disk added, and then the operator realized they put the disk in the wrong server, so they pulled it out again. No harm done, the server is running and the disk was never actually ...
0
votes
0answers
142 views
Windows Server 2008 R2 Standard welcome screen hangs
Windows Server 2008 R2 appears to be hanging while loading the OS.
The server gets to the welcome screen and appears to be loading, but this process for 20-30 mins before the OS loads. The screen ...
-1
votes
2answers
41 views
The device, \Device\Harddisk4\DR37, has a bad block
I've received the error below and wondering if it's something I should be worried about? I've checked the RAID controller and all are functioning without errors.
Log Name: System
Source: ...
1
vote
2answers
163 views
route packets through hardware loopback interface, not lo
My embedded Linux board has 3 interfaces:
eth0 - For all outbound traffic
eth1 - A hardware loopback (traffic leaves board, but comes immediately back in the same port)
lo - Standard loopback ...
-1
votes
1answer
37 views
S.M.A.R.T does not want to run
How do I run S.M.A.R.T on a server with 2 hard drives in RAID1?
I tried:
smartctl -i -d /dev/sda
smartctl -i -d /dev/sdb
smartctl -i -d /dev/md1
but get this error:
smartctl 5.40 2010-07-12 r3124 ...
0
votes
1answer
82 views
Hard drives fail, filesystem goes into read-only mode
2 days ago I got a warning message that:
A DegradedArray event had been detected on md device /dev/md1.
I contacted my data center and asked them to change the hard drive. They told me that ...
-1
votes
2answers
43 views
server busy threshold? [closed]
i have a server with 512MB RAM running mysql and apache service. I have joomla site inside my server.
I want to ask,
is there a brief threshold limit of RAM when the server will be stated
as busy? ...
0
votes
2answers
44 views
Manage multiple hardware and OS
I'm new at windows management, before I've worked only with Apple Macs.
Now I am at a company that has almost 100 computers with different boards, brands, different hard drives, etc.. in different ...
1
vote
2answers
105 views
Not able to achive 6Gbps speed using MegaRAID SAS 9260-4i
This might sounds stupid, but my hardware skills are not very strong.
I have a 2U box with MegaRAID SAS 9260-4i - RAID 5 (3 x 3TB SATA III 6Gbps )
using mega raid cli tool here is the drive info.
...
3
votes
1answer
174 views
DL380 G4 dead after erasing NVRAM
Got a used HP ProLiant DL380 G4 server. It was at least able to start from an Ubuntu live CD a few days ago. When I connected the iLO-port to a router with DHCP server iLO 1.62 was accessibly using ...
0
votes
1answer
109 views
How to retrieve memory type (rdimm or udimm)?
i've some DELL servers, some have registered dimm memory, others have unbuffered dimm. Do you know any way to programaticaly get this info ? wmi class win32_physicalmemory doesnt seem to help on this ...
0
votes
0answers
283 views
Poweredge 2950 BIOS Halt, PCIe
I have a Dell Poweredge 2950 2U Server, and after opening the case to replace a dead RAID card battery I receive the following BIOS error message:
PCIe Degraded Link Width Error Embedded I/O Bridge ...
2
votes
2answers
88 views
What is this thing?
We just moved into a new office. The previous tenants went out of business, and left behind anything they couldn't sell off in a hurry.
One of the objects left behind was this thing:
It looks ...
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votes
2answers
102 views
How do power consumption and size-of-smallest-feature matter when buying a processor? [closed]
Background: I am shopping for processors to build a server on Newegg.
The first bullet point on each processor displays the size of the chip in nm and its wattage. Why?
I am looking at the number ...
