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

learn more… | top users | synonyms

7
votes
6answers
775 views

Rack layout for future growth

We're getting ready to move to a new colo facility and I'm designing the rack layout. While we have a full rack, we only have 12U worth of hardware right now: 1x 1U switch 7x 1U servers 1x 2U server ...
-3
votes
0answers
26 views

DNS Server Hardware Specifications for 100,000 or 200,000 Queries Per Second (QPS) [duplicate]

I hope everyone is fine. I am planning a load testing on DNS Server. I want a single client to send upto 200,000 QPS. The thing is that now I am going to buy/utilise the Hardware that will run the ...
1
vote
3answers
30 views

Is it possible to find a computer's physical location in a room?

I'm currently working on our network monitoring system (NMS) project, and I want to know if there's a way for me to pinpoint where each PC is currently at. Say, for example, we have a room with 40 ...
18
votes
3answers
2k views

What is this wiring panel and what are these Ethernet “ports?”

In my office's building there is a stone-age LAN rack with some Ethernet ports I've never seen before. I need to find the name of this ports, if they have one, and then buy some cables or adapters. ...
1
vote
1answer
33 views

Is it safe to use PoE injector for routers that do not support PoE

We bought an Asus router n66U to be installed in a tourist bus along with a server. The bus has a inverter to supply a 220V AC. However, there can be abrupt power fluctuations specially during ...
2
votes
5answers
190 views

Are web servers/services more prone to fail outside of working hours?

I've just had a server outage at 4.59AM on Sunday morning, and looking through our uptime records going back to 2006 all except for 4 outages out of 20 occured between 11PM and 6AM. (Only looking at ...
3
votes
6answers
559 views

Build two servers or buy one from manufacturer?

I'm replacing three 7 year old servers with one new one. We are a small k-12 independent school, running AD, exchange, a database, and 3 3rd party apps. From my research it looks like I can build 2 ...
18
votes
7answers
4k views

Do you continue to use your end-of-life server/network equipment?

So you spend lots of money on nice servers, storage arrays, or network equipment and it works wonderfully for you for years. But after 3-6 years your vendor no longer offers maintenance for the ...
0
votes
1answer
990 views

Belkin Flip KVM keyboard skip problems

I have just bought a Belkin Flip 2 port KVM. Functionally it is almost there except I have a keyboard sticking problem. So if I type the word 'Hello' it will often (about 25% of the time) output ...
12
votes
13answers
874 views

Hard drive fail - How to regain confidence on the drive or make some use of it

After a hard drive fail (lots of corrupted sectors) I reformat it, but the drive give me no confidence to use it in production. Is there a tool to stress test so I know I can use it? In which ways ...
1
vote
2answers
378 views

What factors affect the noise level of a server?

I have a Dell PowerEdge 1950 rackmount server. It hosts an important SQL database, and in the past month or so, it has become very loud, which is irritating and distracting me. I ran some basic ...
5
votes
7answers
1k views

How do I lubricate a noisy fan?

I have a case fan that can be quite noisy. I can take the fan out of the case, peel back the sticker on the center to expose access to the bearings, and lubricate the fan. Thus far, I've been using a ...
3
votes
5answers
799 views

What to do With Power PC Mac Systems

I have a customer - a small business where IT is a cost center, not a profit driver - with six high-end PowerPC machines (dual-CPU Power Mac G5, 2G RAM, the works...). These machines will shortly be ...
2
votes
2answers
733 views

Hardware to remotely reset a server which doesn't have a built in IPMI module?

I work for a hosting company, where we offer colocation services. Since we offer colocation for client hardware which we don't own, a lot of the client devices don't have an IPMI module to allow ...
4
votes
1answer
783 views

Save the Dell PowerEdge blue indicators

I'm staring at several racks of Dell Poweredge servers, which have behaved very well for us, but... The blue power indicators (LCD backlight on newer machines) fade out over time. I think I could ...
0
votes
0answers
8 views

Belkin Enterprise KVM - Displays 88

I just picked up a used Belkin OmniView Enterprise (F1DE216C), and it powers on, but both displays show 88 instead of the expected bank ID. There isn't any output on the attached console screen, ...
2
votes
4answers
280 views

What features of a HP DL server make it so much more performant than commodity hardware?

I've used HP DL machines at work. I found them to be blazingly fast, but very expensive - up to $15k, I am curious though, although the spec we typically used (e.g. dual AMD Opteron 2.6GHz, 8 or 16GB ...
1
vote
1answer
840 views

HP Server attention light is blinking?

We have an older HP Server RP2470 running HP UX. I've been assigned to perform some hard drive clean up and OS Maintenance on the server before we move it into production. Everything is going just ...
21
votes
6answers
837 views

How to prepare computers for donation

We are decommissioning around 40 Dell desktops. We would like to donate them but drives need to be wiped. What's the best approach to wipe them all as efficiently as possible? Is it standard practice ...
1
vote
1answer
53 views

SD card for iDRAC 6 Enterprise - Dell vFlash or “normal” SD card?

I have got the built-in iDRAC 6 Express working on our Dell R610's, but I am about to get some iDRAC 6 Enterprise cards, which can be gotten fairly cheaply on eBay (around 20 USD at the time of ...
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 ...
7
votes
1answer
93 views

Automated hardware testing of HP servers?

As part of provisioning servers we run HP's Insight Diagnostics to test the hardware. This is a manual process. Is there a way automate the running of Insight Diagnostics? There is the hpdiags ...
0
votes
2answers
74 views

my dell power edge 2900 power off after 1- 1.5 hours automatically

My Dell PowerEdge 2900, running Windows Server 2012 powers off after 1 - 1.5 hours automatically. Is a fan speed fault on the front panel is, but that should not stop the server. I swapped a ...
-1
votes
0answers
17 views

Minimum hardware requirements for live video streaming service [duplicate]

I am planning to build a live video streaming service where I will have no more than 10 RTP stream sources to be encoded in Linux using ffmpeg to mp4 and ogg, then streamed to a network of no more ...
3
votes
3answers
338 views

How do manufacturers figure huge MTBFs?

I've been looking into purchasing some switches for a new office fitout, and I notice that Netgear give their MTBF as 45 years (!). How do they figure this out? Is this number meaningless? I assume ...
3
votes
4answers
4k views

How to make my HP server boot faster?

I have an HP ProLiant DL370 G6 server that I am using as a workstation. It takes 60 seconds during reboot and cold boot before screens post with a discrete Radeon HD6xxx GPU. What can I do to make ...
0
votes
0answers
19 views

Power multiple 5V/12V devices off a single transformer? [migrated]

I have these devices in my cabinet (Q-Panel) that have these power requirements: 21V 1.2Amp 5V 500mA 12V 1.5A 12V 1.5A 48V 1.25A Obviously I can't do much about #1 and #5. I want to be able to ...
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 ...
121
votes
6answers
13k views

Are SSD drives as reliable as mechanical drives (2013)?

SSD drives have been around for several years now. But the issue of reliability still comes up. I guess this is a follow up from this question posted 4 years ago, and last updated in 2011. It's now ...
1
vote
1answer
17 views

Finding out which cciss disk is what /dev/sdX disk (smartmontools & cciss raid controller)

I have a HP server, which has a hardware RAID array (that mostly isn't being used for raiding, the disks are just passed through to the Linux OS). I have 6 SSD disks. 2 are riad mirrored together by ...
1
vote
1answer
33 views

is it possible to move hard disks in raid 5 to pc without raid controller for accessing the information Temporarily?

I want to rebuild my array (RAID 5) for expansion. In the current configuration, I have 3x320GB hard disks giving me about 600 GB usable. I want to replace these hard disks with 3x1TB hard disks ...
2
votes
2answers
93 views

Fan Speeds on SuperMicro System via IPMI

I have a SuperMicro 4027GR-TRT server that I am running multiple GPUs in. I would like to set the cases fan speed higher that what they are right now using IPMI, although I am not sure how to do it. ...
3
votes
1answer
61 views

cannot remove faulty device from LVM2 raid1 mirror

One of the three disks went off in my LVM raid1 logical volume. (It was a bad experiment actually). The volume is a pure LVM raid1 one (no, not an LVM mirror), without any mdadm / fakeraid. The ...
2
votes
0answers
38 views

BUG message on xenserver 6.5 - bad memory?

Several times a day I receive the following error in /var/log/messages. The server hangs and requires a reboot to respond again: Feb 1 13:44:54 xenserver-abfuqvrs kernel: [35023.166776] BUG: unable ...
-3
votes
1answer
77 views

How many hours of SMART power on hours use should a new hard drive have?

Purchased a new HGST hard drive. Using smartctl on OS X the new drive shows 71 hours of power on hours Does this make sense or is this a sign of a refurbished drive? I can't imagine why the ...
0
votes
1answer
49 views

Ubuntu 14.04 Cloud Server - Disks gone Read Only

Disks on our cloud server with our web host went read-only this morning for no apparent reason. Following that a reboot to try and rectify the issue resulted in a non-bootable system. Our Web Host ...
0
votes
1answer
54 views

Does the SAS Expander / Backplane matter?

If I am buying some used servers with 24-25x SAS that I hope to someday upgrade from 6Gb/s to 12Gb/s RAID, do I need to be concerned at all with the backplane that the drives are plugging into not ...
3
votes
2answers
4k views

VMware ESXi and ZFS hardware & configuration recommendations [closed]

I want to finally spend a little money upgrading my company's virtualization infrastructure, but I've been looking at hardware for a couple of weeks now and I'm not quite sure what's appropriate for ...
2
votes
4answers
203 views

Are magnetic-tipped screwdrivers okay around servers?

Specifically, I am asking about screwdrivers with removable tips (something like this), but I think the answer would apply to any magnetic-tipped screwdriver. Will the magnetic field damage anything ...
0
votes
1answer
324 views

Rack Mount for a 3Com 4210 switch

Does anyone know where I can get a rack mount kit for a 3Com 4210 9 port switch. Needs to fit into a 19" rack
7
votes
8answers
4k views

Any reason to use a rack-mountable server if I lack a rack to mount it on?

I'm somewhat new to server hardware, and was wondering if there was any reason to purchase a 19-inch-rack-mountable server as opposed to a standalone (tower) system, or any difference between the two ...
2
votes
3answers
181 views

Reusing existing equipment

One of my clients has a small office in a major city that used to be main office for the company.Due to the organizational changes main office was moved to a different country but all equipment and ...
6
votes
10answers
257 views

Should you replace a whole department's PCs or half?

Our department are replacing the PCs that are over 3 years old. However, despite the age of the PCs, they're all similarly spec'd, so a 3 year old PC is still the same similar spec as a 1 year old ...
1
vote
8answers
234 views

Purchase servers for my start up, or build them ourselves?

I'm working on a web startup that would involve us hosting and streaming a lot of large files, such as video files, and I'm just wondering if it'd be better, cheaper, etc. to purchase the dedicated ...
6
votes
9answers
2k views

Off-brand laptop batteries?

I tend to err on the side of paying too much for quality stuff, but $180 for a standard replacement battery for a Dell laptop makes the $80 knockoffs look pretty tempting. I wouldn't consider it ...
3
votes
5answers
258 views

What is the most cost-effective way to buy a Windows 2008 server?

I'm a programmer, so I have no real experience with buying servers. In order to make a solution work, my customer needs the most cost effective server. I used to work for an IT support company, so I ...
26
votes
5answers
3k 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 ...
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 ...
2
votes
3answers
130 views

What are the differences between consumer grade SSDs and the much more expensive enterprise SSDs?

I am in need of a terabyte or so of storage space for Lucene indices on a testing server. I'm having a hard time differentiating between disks like the Samsung 840 evo for about $450 vs SSDs with ...
-2
votes
1answer
31 views

Dell R410 and X5690 wont boot

I have an R410 that we opened up to upgrade from 2 x E5520 to 2 x X5690. However after the upgrade network didnt work and we could not even get a monitor output. We tried swapping CPU positions and ...