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Questions tagged [hardware]

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

159
votes
5answers
30k 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 ...
12
votes
4answers
34k views

Incredibly low disk performance on HP ProLiant DL385 G7

As a test of the Opteron processor family, I bought a HP DL385 G7 6128 with HP Smart Array P410i Controller - no memory. The machine has 20GB ram 2x146GB 15k rpm SAS + 2x250GB SATA2, both in Raid 1 ...
28
votes
4answers
39k 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 ...
22
votes
1answer
19k views

Hosting a ZFS server as a virtual guest

I'm still new to ZFS. I've been using Nexenta but I'm thinking of switching to OpenIndiana or Solaris 11 Express. Right now, I'm at a point of considering virtualizing the ZFS server as a guest within ...
16
votes
2answers
42k 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 ...
40
votes
1answer
37k views

HP ProLiant DL360 G7 hangs at “Power and Thermal Calibration” screen

I have a new HP ProLiant DL360 G7 system that is exhibiting a difficult-to-reproduce issue. The server randomly hangs at the "Power and Thermal Calibration in Progress..." screen during the POST ...
8
votes
13answers
36k views

HP Proliant DL380 G4 - Can this server still perform in 2011?

Can the HP Proliant DL380 G4 series server still perform at high a quality in the 2011 IT world? This may sound like a weird question but we are a very small company whose primary business is NOT IT ...
27
votes
6answers
30k 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 ...
6
votes
4answers
13k views

HP D2700 enclosure and SSDs. Will any SSD work?

I've got an HP D2700 enclosure that I'm looking to shove some 2.5" SSD drives in. Looking at the prices of HP's SSD drives vs something like an Intel 710 and even something less 'enterprisey', there's ...
47
votes
7answers
13k views

Probability of Blade Chassis Failure

In my organisation we are thinking about buying blade servers - instead of rack servers. Of course technology vendors also make them sound very nice. A concern, that I read very often in different ...
141
votes
12answers
24k views

Should servers be turned off at night?

There is a server that is used from 4:30 am in the morning until ~ 22:00. Should it be turned off? I think that it is a server and that it won't have a problem to stay on, but serious professors are ...
58
votes
12answers
7k views

What should I pay attention to when I'm buying a network switch?

Since I'm not a hardware expert, I don't know what features make a network switch a good network switch. What should I pay attention, when I'm comparing the different models from different vendors?
37
votes
13answers
224k views

How to find out details about hardware on the Linux machine?

-i.e - how to get a full list of hardware components in command line (on a machine with no window system) Thank you.
29
votes
2answers
15k views

Why are enterprise SAS disk enclosures seemingly so expensive?

I will begin by stating that I do not believe this is a duplicate of Why is Enterprise Storage so expensive?. My question is specifically about SAS drive enclosures, and justifying their expense. ...
12
votes
4answers
48k views

Controlling HP ProLiant DL380 G6/G7 fan speed

I'm having fan speeds and noise level issues from my most recent batch of HP ProLiant DL380 G7 servers. Most of the systems are nearly silent with low fan speeds (as reported by hplog -f). The ...
24
votes
13answers
3k views

High Failure Rate of Large Drives?

I recently deployed a server with 5x 1TB drives (I won't mention their brand, but it was one of the big two). I was initially warned against getting large capacity drives, as a friend advised me that ...
5
votes
13answers
4k views

What are the Benefits of Server Hardware? [closed]

What are the benefits of using Server Hardware versus just placing server software on top of Desktop Hardware? I've been running a small time webserver for a couple of websites, a blog and a multi-...
14
votes
3answers
14k 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 ...
21
votes
11answers
46k views

Physically Identify the failed hard drive

So, let's say your server had 6 healthy hard drives. A drive fails (will not mount/detect, drops out of raid with errors) or is failing (SMART getting worse, etc). You need to swap out the bad drive....
27
votes
5answers
9k 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 ...
12
votes
9answers
4k views

Should old servers be retired

I have servers which are still running well but are over 5 years old. They are still doing the job perfectly and there will be no advantage to upgrade the servers, should I just let them run forever ...
7
votes
4answers
10k views

What to do with an out-of-warranty Barracuda Spam/Web filter?

I'm working with an organization that would like to start using a old Barracuda Spam Filter 300 unit. I've sold and configured plenty of these, but was surprised to see that this unit's warranty ...
7
votes
3answers
53k views

How to find RAID configuration/level and RPM speed having only remote access to the server?

Having only remote access (no physical access), to a server (that is SSH), how do I (or may be is it possible): find out whether it is RAID configured or not? If it is RAID configured, whether it is ...
3
votes
1answer
20k 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 ...
3
votes
4answers
14k 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 ...
46
votes
5answers
183k views

DIMMs: Single vs. Double vs. Quad Rank

What difference does the 'Rank' of DIMMs make to server memory? For example, when looking at server configurations I see the following being offered for the same server: 2GB (1x2GB) Single Rank PC3-...
32
votes
9answers
23k views

Reliability of ssd drives

The main advantage of SSD drives is better performance. I am interested in their reliability. Are SSD drives more reliable then normal hard drives? Some people say they must be because they have no ...
10
votes
4answers
45k views

How do I get my HP servers to email me when a drive fails?

Ideally, with as simple of install as possible and without requiring rebooting the servers. Mostly for DL380 G5's if it helps. Thanks.
27
votes
8answers
9k views

Consumer (or prosumer) SSD's vs. fast HDD in a server environment

What are the pro's and con's of consumer SSDs vs. fast 10-15k spinning drives in a server environment? We cannot use enterprise SSDs in our case as they are prohibitively expensive. Here's some notes ...
9
votes
11answers
3k views

GUI tools to administer Linux Box

What GUI tools do you advise to improve the usability of Linux for those accustomed to doing system administration the windows-way? Users new to Linux often get confused when they need to configure ...
31
votes
7answers
5k 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 ...
22
votes
5answers
5k 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 ...
7
votes
6answers
18k views

MegaRAID JBOD substitute

It seems that certain MegaRAID chips don't support JBOD (unfortunately). I've read online that to make these controllers act as a pass-through, I should configure the disks in RAID0. What RAID0 ...
4
votes
6answers
7k views

What are the cons to using a PC/cheap PCs as servers vs hardware designed to be used for servers?

What is it with server hardware that actually makes it more suited for server hosting vs. say a collection of cheap PCs or a good PC?
16
votes
3answers
123k views

What is the difference between RDIMM vs UDIMM

I don't quite understand the differences between the two besides the obvious price differences. What does each offer over the other?
6
votes
5answers
33k views

ProLiant DL380 G7 won't boot, solid amber power LED

I have a problem with an HP ProLiant DL380 G7 that leaves me without much in the way of troubleshooting approaches. This server will not boot. It was stored in a datacenter, and I went to retrieve it ...
451
votes
7answers
72k 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 ...
29
votes
7answers
19k views

What are the performance differences between Raid 0,1,5,6,10

I have heard/read different performance stories on the various raid flavors. I am curious what the agreed upon best answer is.
35
votes
2answers
6k views

HP plan to restrict access to ProLiant server firmware - consequences?

I've been a longtime advocate for HP ProLiant servers in my system environments. The platform has been the basis of my infrastructure designs across several industries for the past 12 years. The ...
32
votes
3answers
43k views

What is the command to flash a NIC link light?

I remember using a command line tool to flash a NIC's link light to identify it. I can't remember for the life of me what it was.
72
votes
17answers
15k views

Does orientation affect hard drive lifespan?

Are there any studies or evidence which show that mounting a hard drive horizontally is better than vertically for the lifespan of the device? Or upside down, or any direction for that matter.
20
votes
7answers
8k 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 ...
15
votes
7answers
77k views

What is an edge server / router / device?

What is an edge server? We see some references to them, but we never see a definition.
11
votes
6answers
9k views

Hyper-V and Drobo Pro

I'm considering getting a fully loaded Drobo Pro and using it to store VHDs that would run our on a pair of Hyper-V host machines. The host machines would connect to the Drobo Pro via iScsi. Anyone ...
7
votes
6answers
13k views

How to best migrate a server to new hardware

I'm getting ready to migrate a server from old hardware to new hardware. I'm thinking of doing a P2P migration rather than actually rebuilding, reinstalling and migrating databases. The servers are ...
7
votes
3answers
42k views

Moving a RAID array from one machine to another

I'm not too familiar with RAID arrays, but I plan on making a RAID 5 array for a fileserver. However, once I get the RAID running for a while, I have plans to move it to another machine (with ...
1
vote
4answers
2k views

what cpu will work with hyper v

how do i verify if a cpu has the necessary requirements to run hyper v ?
7
votes
13answers
1k views

what to do with old hardware

What do you do with your old / unused hardware? Cables, Hard drives, motherboards, and others peripherals you have around? Stuff that is broken or just too obsolete to use.
4
votes
7answers
61k views

HP Compaq 8200 Elite SFF won't boot from USB drive

Can't get an HP 8200 Elite Small Form Factor to boot from USB. It's done so in the past & the USB boot drive works in a different machine (HP 8440p laptop). Have tried upgrading BIOS (from 2.09 ...
19
votes
1answer
1k views

How to correctly move a server inside a rack up and down

Maybe a bit stupid question, but Sometimes (rarely but it happens) I need to move a server in a rack 1-2U up or down. What do you think, which of the ways is the most correct and useful and why? ...