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

learn more… | top users | synonyms

-4
votes
2answers
106 views

file server hard disks for 20 concurrent users and 2 TB of data. Do i need SAS or SATA disks? [closed]

I plan a new fileserver with 20 concurrent users and 2 TB of online storage. I plan to divide this data volume over 3-4 separate disks. I plan to buy 10k rpm disks. Implementing RAID-1, this would ...
1
vote
1answer
2k views

Can't find fan speed setting on Supermicro X9DRW

I have one Supermicro server with a X9DRW board, BIOS v1.0a, that does not seem to have any way of controlling fan speed. I've looked through the entire BIOS, including the usual location of ...
-1
votes
2answers
213 views

High density disk bay rack chassis - why such a big difference in price?

We're looking for a chassis with 45-60 bays for SAS/SATA disks and we found some 60-bay enclosures at ~ $11000 (see here and here for example - there are others as well). However we found this one ...
2
votes
1answer
3k views

HP ProLiant DL380 G7 servers will not POST

We have just received 2 HP DL380 G7's from our DR site. They have been running fine at the site for some time but we have tried to power them up in our DC and they will not post. We get a very brief ...
1
vote
0answers
156 views

best setup for fast sustained streaming (sequential?) disk writes

i am setting up a high speed/high resolution scientific image acquisition system. i need data write rates of ~1 GB/sec sustained for ~1 hour. i don't have experience with raid, but my plan is to ...
12
votes
3answers
3k views

Force renegotiation of PCI Express link speed? x2 card reverts to x1 width

In an effort to circumvent compatibility and cost barriers to using SSD drives with newer HP ProLiant Gen8 servers, I'm working to validate PCIe-based SSDs on the platform. I've been experimenting ...
10
votes
2answers
419 views

Linux kernel detecting wrong processor frequency

After a cold boot of a 6.0.8 Debian server (HP ProLiant), ntpd played havoc with system time: offset and jitter with respect to the usual and reliable reference time servers growing without limit. ...
4
votes
1answer
92 views

Should APIC be used on VMs?

I'm provisioning some VMware and Virtualbox VMs, both 32 and 64 bit and all my boot commands start with /install/vmlinuz noapic. Searching for information about APIC etc. around the web doesn't give ...
0
votes
1answer
89 views

Fibre card to switch (mini-Gbic)

I have a server with a fibre card in it which I want to connect to my 24 port procurve switch. The 10G 2 port fibre card supports fiber transceivers supporting SR, LR, LRM. The switch has two ports ...
3
votes
1answer
3k views

What is a maximum useful length of SATA/SAS cable

The server in question is DELL PowerEDGE SC1435. I am thinking about buying a LSI 1068e based card with two internal SFF-8087 ports. I intend to use the machine with external multiple hard disk ...
3
votes
2answers
54 views

hba for software raid

In a software raid environment, is HBA failure the same as a hardware RAID controller failure? Do you still have to find the same model HBA to put into a different server in order for the drives to ...
0
votes
1answer
65 views

IBM x360 DVD drive?

My x360 server has only a CD drive in it. I wish to upgrade and install a DVD drive, so it is easier for me to install software without sharing my workstation DVD drive all the time. According to ...
0
votes
2answers
88 views

What amount of physical RAM would a typical “commodity class” server have, as of late 2013? [closed]

I'm trying to spec out servers for my company's infrastructure group to build. They tell me anything more than 2GB is too much, which I find ridiculous considering cheap DRAM is about 15 bucks a dimm ...
-3
votes
1answer
84 views

How to estimate a server specifications for this particular system? [closed]

I'm working in a college project and I'm supposed to specify the server's hardware to hold a system. The system is some kind of social network. And it is supposed to hold around 100 000 users the ...
14
votes
3answers
8k views

What happens when the USB key or SD card I've installed VMware ESXi on fails?

An SD (SDHC) card installed in an HP ProLiant DL380p Gen8 server running VMware ESXi just failed :( I encountered some ominous looking messages on the vCenter console and in the HP ProLiant ILO event ...
0
votes
1answer
3k views

Upgrading a PERC h310 to a PERC H710 mini RAID controller on a Dell R620

I have an ESXi 5.0 Free license host using an internal Datastore (RAID 5, 5 Disk) that was configured with a Dell PERC h310 RAID controller. The disk performance was very poor, so I upgraded to the ...
0
votes
1answer
737 views

How to see all nics in Solaris 8/9

I have a questions regarding how to see all NICS in the solaris 8/9 SPARC boxes. Even if they are active/inactive. dladm show-link command does not work. cat /etc/path_to_inst could but it's hard to ...
4
votes
1answer
423 views

DDR3 10600 memory running at 533mhz

I bought a second-hand HP ProLiant DL160 G6 a year ago with 48GB configured in it. I discovered checking with cpu-z and doublechecked with speccy the memory runs at only 533Mhz. I checked the ...
1
vote
1answer
114 views

A practical way to do healthcheck for a new server?

I am currently trying to do healthcheck for a new server in data center as a first QA before using by any application side. "What is the practical way and tools to check that the server is fine to ...
0
votes
1answer
604 views

Server Sizing Methodology [duplicate]

Our development environment consist of JBoss 5.0.1 DB Server, SQL Server 2008, Oracle IDM. Hardware is Win 2008 32 bit, 4GB RAM. We have reached stage where our environment can not handle application ...
2
votes
0answers
180 views

Hardware Clock (RTC) Stuck / Will Not Increment

After we rebooted one of our servers (RHEL), we noticed that it would hang when entering GRUB. The problem was the countdown in GRUB (Booting in 5... 4......) was not counting down, and was stuck at ...
3
votes
1answer
105 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
vote
0answers
54 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
1answer
355 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) ...
2
votes
1answer
69 views

Netra X4270: How do I enable the locator LED from command line (without iLOM)?

Title says it all really - I have a bunch of servers in our lab that I want to set the locator LED on (so they can be identified and serviced). However the iLOM IP addresses are not accessible (the ...
13
votes
5answers
4k views

ZFS best practices with hardware RAID

If one happens to have some server-grade hardware at ones disposal, is it ever advisable to run ZFS on top of a hardware-based RAID1 or some such? Should one turn off the hardware-based RAID, and run ...
5
votes
2answers
186 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
69 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
291 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
117 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 ...
0
votes
1answer
49 views

10 Screen, Two Separate PC day trading setup - Questions [closed]

Currently i have 6 monitors on one PC (4 are data streaming, 1 for trade execution, 1 for web browsing) I would like 10 monitors, however, to reduce lag id like one PC to deal with data streaming, ...
11
votes
2answers
425 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
57 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 ...
1
vote
1answer
960 views

BBWC Parts for Proliant DL380 G5 / HP Smart Array P400

I have a Proliant DL380 G5 server with HP Smart Array P400 controller, the performance of the disk I/O is bad lately and I found out that during my research that I can improve it by enabling the write ...
0
votes
1answer
474 views

How to fix Supermicro AOC-SAS2LP-MV8 on Ubuntu 12.04 when attached drive doesn't show?

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 and lshw see the card but the ...
-5
votes
1answer
937 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
671 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
152 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 ...
0
votes
3answers
427 views

Sever configuration for 100 users [duplicate]

I have an issue related to what server to approximate for the following scenario (a real situation): I have a server where will be stored some videos that can be accessed through a web application ...
21
votes
4answers
1k 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 ...
4
votes
1answer
200 views

What's the difference between a Cisco 7613 Router and a Cisco 7613 Chassis?

I see both names referred to in the manufacturer's literature. Is one part of the other? Are they both the same thing? My reason for asking is that I'm trying to standardize an organization's ...
1
vote
1answer
59 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 ...
0
votes
1answer
396 views

IBM x3200 M3 - RAM compatibility

I've got my hands on a IBM x3200 M3 server. ESXi 5.1 is installed on it and more RAM would be much needed since there's only 2 GB installed for the moment. Does anyone know how it's working with RAM ...
1
vote
1answer
186 views

What hard drives does a HP Proliant BL20p G3 Blade Server take?

Full name: HP Proliant BL20p G3 Blade Server 380634-B21 I'm currently a student and got a Proliant with no hard drives for £19.99. Could anyone point me to the right hard drives to get for it, I'm ...
3
votes
2answers
3k 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 ...
0
votes
3answers
313 views

How to pull hardware and software health monitoring information out of ESXi hosts in to my company's webpage?

I know the vSphere Client when connected to a host or vCenter provides the health monitoring parameters of the installed servers. But I want this information on my company's website. So the back ...
3
votes
3answers
144 views

Hardware to send a restart signal to a desktop motherboard

Have a cluster of desktop computers that are used to process data. Sometimes they crash and it would be nice of we could send a signal to the motherboards on them to restart the machine if we stop ...
1
vote
1answer
141 views

Demystifying HP VC-FC 4Gb Module on c7000 Chassis

has anyone used the HP VC-FC 4Gb Modules before in a c7000? If so could you help me understand the "Connect To" column? It shows a WWPN, but when looking at our FC switch it is connected to I don't ...
5
votes
3answers
788 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 ...
3
votes
1answer
180 views

What determines what resolutions a laptop is willing to output over VGA?

I'm responsible for several conference rooms and have setup 1080p projectors and I provide both HDMI and VGA connectivity. HDMI for DisplayPort and Mini-DisplayPort, and VGA as a fallback, universal ...