Computer hardware is the collection of physical elements that comprise a computer system.

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13
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1answer
4k views

Hardware RAID controller cache battery failure frequency/lifetime?

I'm in an environment that contains many Supermicro servers equipped with Adaptec and LSI MegaRAID hardware RAID controllers. These controllers contain battery-backed cache modules to help boost write ...
-1
votes
1answer
58 views

Mounting ssd. Expectations vs reality about server load

I'v installed SSD on my server and moved tmp folder, mysql data folder and 2 most loaded websites(php) on it. I'v expected that server load will fall a little bit, but it seems that it is on the same ...
7
votes
1answer
7k views

How exactly does a SAS SFF-8087 breakout cable work? + RAID/connection questions

Please let me know if my question does not makes any sense as I am not sure if I am interpreting it correctly from my thoughts due to my lack of technical knowledge on this. If I am using a ...
1
vote
2answers
86 views

Install RAID1 without Second Hard Drive?

HP P410i Raid Card. I am waiting for a second hard drive to arrive. Is it possible to start with 1 hard drive and enable RAID1 without loosing data when the second drive is installed?
2
votes
4answers
9k views

HP ProLiant ML310e Gen8 early system initialization hangs on 90%

just unboxed a brand new HP ProLiant ML310e Gen8 Server. I can reach the iLO webinterface but the Server hangs on the early system initialization on 90 % with the status code 0114. I did not find any ...
-2
votes
1answer
409 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 ...
2
votes
3answers
206 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 ...
19
votes
4answers
2k 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
232 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
233 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 ...
0
votes
1answer
954 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
2k 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 ...
0
votes
2answers
76 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 ...
1
vote
2answers
277 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 ...
1
vote
5answers
4k 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
1k 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. ...
0
votes
2answers
1k 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
256 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
323 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
63 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
249 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
726 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
373 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 ...
5
votes
3answers
956 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 ...
337
votes
7answers
60k 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
1answer
27 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 ...
10
votes
4answers
371 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
534 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 ...
2
votes
2answers
228 views

High number of ethernet errors. Tool for testing the ethernet card?

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 ...
-1
votes
1answer
367 views

Difference between storage and operating temperatures [closed]

What is the difference between Operating temperatue & storage temperature of switch C3560E ?
1
vote
1answer
1k 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
62 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 ...
2
votes
1answer
225 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
137 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
3answers
2k 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
431 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
144 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
999 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
64 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
160 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
55 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
67 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 ...
2
votes
2answers
442 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
1k 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
417 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 ...
2
votes
2answers
101 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 ...
-3
votes
2answers
196 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 ...
0
votes
1answer
617 views

What's the point of Load Balancing between multiple SSID on the single wireless AP device?

I have a Cisco WAP4410N AP device. Since yesterday, it is supposed to serve a network of about 15 (max 20) clients at the same time, but not all clients will be using bandwidth simultaneously, since ...
0
votes
2answers
831 views

install third party ssd in ibm xseries x3650 M4

i am in the process of purchasing a new network server, it's going to host SQL Server and Exchange so i would like to have the best possible IO, the ibm SSD i could afford it's the micron P400e, i ...
-3
votes
1answer
121 views

How much RAM and CPU throughput can handle 20GE in Cloud? [closed]

We're going to build a cloud infrastructure and would like to use the HP DL160 G8 with a 20GE NIC (2x10GE LACP). How much RAM and CPU can handle this NIC? The server will have at least 2x Intel ...