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

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3
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1answer
76 views

Investigating a potential CPU failure

On a Ubuntu server that I am using for computations I have recently observed that some CPU extensive programs (GUROBI,CPLEX) often segfault. Being in correspondence with tech support of the ...
1
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0answers
27 views

DIR $file “File Not Found” vs DIR $filedir shows it…not permissions, not USB

I was having this problem before on a USB drive, but now it's happening on my main RAID5-backed hard disk: 2013-10-17 9:37 C:\>dir "C:\Shares\Shared\Reference\Safety Management System\Vid eo ...
0
votes
0answers
117 views

How to find L1, L1i, L1d cache from dmidecode output?

How to find L1 , L1d, L1i cache from dmidecode output ? (NOTE: dmidecode file is from different server for which I do not have access, So I can not run lscpu command to find the same) ...
5
votes
2answers
165 views

New server causing weird noise in headphones and speakers; Is this electromagnetic interference? What's causing it?

I work for a small radio station that recently acquired a refurbished Dell PowerEdge 1950 server. After placing it in the server room along with several other servers and sound processing hardware ...
-1
votes
1answer
60 views

ESXi Virtualization server hardware [closed]

I am currently in the process of selecting hardware for a homelab ESXi server. My requirements are running around 30 virtual machines simultaneously with a GNS3 Cisco backbone running in the ...
1
vote
1answer
86 views

How to use all disk space on preinstalled Linux [closed]

I ordered dedicated server with Linux Debian Wheezy preinstalled with "Paralles Plesk Panel". Provider states I have 2x1TB drives. Yet my avaible disk space is just 100GB. Do I lack a partition? I ...
0
votes
1answer
77 views

DDoS Protection [closed]

Let's say I order a half rack (22U) at any colocation company. They give me a GiGe port and I need DDoS protection. If I use a slot in my rack for Arbor protection, will I be protected up to a certain ...
10
votes
2answers
365 views

What are 19mm high 3.5" hard disks called?

According to Wikipedia a normal 3.5" harddisk is 25.4mm high, but then there exist also a 19mm version, which I need for a HP ProLiant MicroServer. Looking at our resellers webshop I see the ...
0
votes
1answer
44 views

Improving Hard Drive controllers and Software RAID [closed]

I believe the biggest pro of hardware RAID is that, providing your RAID controller is battery backed, you can enable write-back cache. This can also be achieved similarly through software RAID with ...
0
votes
1answer
150 views

Ubuntu 12.04 server and Supermicro AOC-SAS2LP-MV8

I am having some trouble. I have a Supermicro AOC-SAS2LP-MV8 controller card that I am trying to get to work on Ubuntu 12.04 server (x86_64). The card is based on a Marvell 88SE9485. So far lscpi ...
-1
votes
1answer
358 views

Vpd r/w failed This is likely a firmware bug on this device [closed]

Does this mean my RAID 1 device is failing? EDIT: seeing this is a raidcare issue. How can I pull the specs and download/install the driver? netlink: 12 bytes leftover after parsing attributes. ...
1
vote
1answer
160 views

IPMI drivers missing

I am trying to monitor and manage some servers using OpenIPMI in Ubuntu, and for some reason, when I start the OpenIPMI service, it says: Starting ipmi drivers [fail] ...
2
votes
1answer
98 views

How does a NIC send a hardware interrupt? [closed]

Some context. A few weeks ago, a NIC was replaced on a box without much troubleshooting to find a clear resolution to the problem. A senior administrator got into a small tiff with an entry-level ...
19
votes
4answers
822 views

What to look for in a datacentre ethernet switch

This is a Canonical Question about choosing a network switch for a datacentre When shopping for a networking switch that's going to be going into the top of a datacentre rack, what specific ...
1
vote
1answer
51 views

What difference between HP and Intel network adapter, both using an Intel controller?

For example, the network adapter HP NC360T PCI card uses the Intel 82571EB controller. So, what exactly is the difference between an Intel "fully" branded card, and a HP branded card having an Intel ...
2
votes
2answers
747 views

Is a hardware watchdog already active at my CentOS server?

I rent a dedicated server (with Intel Haswell CPU and custom hardware) at a lowcost hosting service and use it with CentOS 6.4 / 64 bit Linux (with stock kernel: 2.6.32-358.14.1.el6.x86_64). Every ...
5
votes
3answers
444 views

Hardware checks for Dell R820 Servers through Nagios using SNMP

We use Nagios for monitoring. Is there a way to create hardware checks using SNMP MIB for R820 servers running ESXi5.x on them? Right now we are using this python plugin: current python plugin But ...
1
vote
2answers
54 views

HP p400i - 512MB RAID Controller card

Anyone know if the HP p400i raid controller can support multiple arrays? Say if I wanted a raid 0 with 2x146GB drives, and 3x300GB drives in a raid 5, both on the same card? Also, is it possible to ...
0
votes
1answer
145 views

CentOS dedicated server hangs and discovers new hardware every 3 to 10 hours

I have a dedicated server since March 2013 with CentOS release 6.4 (Final) and CPanel 11.38.1 (build 15) with [Apache/2.2.24 (Unix) PHP/5.2.17]. The server has only one website with traffic about 2000 ...
1
vote
1answer
138 views

Can't sync filesystem without reboot

I'm having an issue with a linux server. Once a week the running mysql instance hangs and there is no way to fully stop it. If I kill it, it remains in zombie status and init does not reap its pid. ...
-4
votes
1answer
240 views

Installing windows on multiple computers at the same time [duplicate]

i need to install windows on a 150 computers for a bank, i've never done anything like this before, so if anyone can help me find a fast efficient way to do so, they are IBM computers all with the ...
2
votes
1answer
455 views

HP DL165G7: NMI error

One of "my" DL165 G7 Proliants has rebooted out of the blue for the second time this month. The reboot was accompanied by these system event log entries in LightsOut: Event Type Date Time ...
1
vote
1answer
55 views

What hardware profile tool exists for RHEL 5.x similar to `lscfg` or `system_profiler`?

I am looking for an equivalent tool or command to dump connected hardware (and optionally software) to a text or XML file for documenting system configuration on RHEL 5.8 specifically. I am used to ...
0
votes
0answers
62 views

FEZ Cobra II Wifi Stability issues and trouble deploying FTP server - Hardware recommendation [on hold]

I didn't know how to put this straight into a question....but here is the scenario....and I was redirected to here from stack overflow I am using a Hardware piece from GHI electronics: its an "FEZ ...
22
votes
4answers
1k views

Do I need to RAID Fusion-io cards?

Can I run reliably with a single Fusion-io card installed in a server, or do I need to deploy two cards in a software RAID setup? Fusion-io isn't very clear (almost misleading) on the topic when ...
7
votes
1answer
321 views

Enabling VMware EVC on Westmere E5645 CPU only accepts “Nehalem” mode

Take the following system, a Supermicro VMware ESXi host with Intel Westmere E5645 CPUs. Part of our deployment process is to set the appropriate Enhanced vMotion Capability (EVC) level for the ...
5
votes
1answer
116 views

Sudden and permanent increase in CPU input voltage, core temperature and fan speed without corresponding increase in load

One of my servers shows strange change in its monitored parameters. Last Sunday evening one of voltage measures ( in0 which I think is Vcore) suddenly increased by 20% from ~1V to ~1.20V on average. ...
0
votes
2answers
417 views

HP ProLiant DL320 G5 No Video Output, No Error LEDs, Swapped Motherboard, Same Issue

I have a HP ProLiant DL320 G5 Server that we have swapped out the motherboard with a working one, tried narrowing down removing different memory sticks, swapped out the onboard battery. I have a ...
2
votes
2answers
791 views

Dell Power Edge 2950 - E211 SBE LOG DISABLE DIMM6

Any idea of what this error E211 SBE LOG DISABLE DIMM6 could mean? Anyone have experienced this? I know that it sound pretty obvious, that is the 6th bank of my memory, and guest what: I have ...
0
votes
0answers
87 views

IBM M1015 in IT mode - Do multiple M1015's force the hard drives to start up in groups?

Once you flash an M1015 into IT mode you can choose to flash or not flash the BIOS. Flashing the BIOS causes slower boot times as the cards will give you time during the BIOS Post to enter a keyboard ...
0
votes
1answer
160 views

Dropping Packets Randomly

I have a SuperMicro Server based on the X9DR3-LN4F+ motherboard from SuperMicro. Original intentions for the system were quite different from what it has ended up serving, but that happens. It is ...
0
votes
1answer
84 views

Which hardware I need for building up a backup server, which is able to store 100TB+? [closed]

we are managing a pool of 40 PCs with an attached storage of up to 3 TB each. Every weekend we copy this data to 3 other PCs with several RAID5-systems inside to have some kind of backup. We chose 3 ...
3
votes
3answers
238 views

How to understand the LSI HBA connector specs?

When reading the specifications for the LSi SAS 9206-16e HBA, it says Storage Connectivity; Data Transfer Rates * 16 ports; 6Gb/s SAS 2.1 compliant SAS Bandwidth * Half Duplex 2400MB/s, x4, ...
0
votes
2answers
131 views

How do I re-enable the IPMI temperature sensors?

I've never had a problem reading temperature sensors with ipmitool on my server, but recently the temperature readings started showing up as disabled: # ipmitool sdr list Temp | disabled ...
22
votes
7answers
1k views

Is it necessary to burn-in RAM for server-class hardware?

Considering the fact that many server-class systems are equipped with ECC RAM, is it necessary or useful to burn-in the memory DIMMs prior to their deployment? I've encountered an environment where ...
2
votes
2answers
697 views

Can I put in laptop 2.5" SATA drives into an HP ProLiant DL380 G5?

I have an HP DL380 G5 server and I was wondering if can I put in standard notebook 2.5" SATA drives? In the front where the drives go, the SATA connections dont seem to fit.
2
votes
0answers
209 views

What might cause DIR $file to report “File not found” when DIR $dir shows the same file just fine?

I can DIR a file and it doesn't exist, but DIRing its directory, or a file in the same directory as it, works fine. Is this a hardware or software problem? If it's hardware, is it the drive or ...
0
votes
0answers
93 views

Performance drop after hours of runtime - how to detecting bottleneck

I am running a local database server for 1 client machine. My DB server runs redis (version 2.6.13) and mysql (5.5.31-30.3-log Percona Server (GPL), Release 30.3). I have 1 Client machine that runs a ...
0
votes
1answer
52 views

Screw size for Dell PowerConnect rack ears?

Does anyone know what the Screw size is (Thread and length) that Dell use on their PowerConnect Switches, to connect the ears to the switch? In particular the 6224 and 8224?
1
vote
1answer
140 views

Dell PowerEdge 850 PSU FAN always on [duplicate]

I have a Dell PE 850 wich is used unfrequently. I've noticed that the PSU fan is always running as soon as I plug the power cord in. So I have several questions regarding this behaviour: 1.) Is it ...
4
votes
3answers
574 views

RAID - buy spare disks at same time as originals?

When using RAID1, is it best practice to buy spare disks at the same time as the original disks to ensure you have the identical type in case they become unavailable in future?
-4
votes
1answer
153 views

What kind of hardware does Microsoft use to build Azure? [closed]

I'm curious about Azure virtual machines and Web/Worker role hardware. What kind of hardware (CPU, Disk, network cards, chipsets, etc..) does Microsoft use to run Azure on? Is there public information ...
13
votes
1answer
1k 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
51 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 ...
6
votes
1answer
3k 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
83 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
5k 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
242 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
179 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
1k 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 ...