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pci interview questions

Top pci frequently asked interview questions

5 x 3GB drives and 4 x 1500GB drive best raid setup?

I am building a file server my plan is the have the Operating system on one raid partition and the data storage on another partition.

I currently have 5 x 3GB IDE drives that i would like to put the operating system on theses drives are old but that doesnt matter to me at the moment i have a ton of them so for this raid partition i would probably want to be able to pull out dead a drive and rebuild the array.

My file partition is going to consist of 4 x 1.5TB SATA drives I would like the maximum storage with some redundancy.

Any suggestions to which Raid level i should use would be greatly appreciated and if you could also suggest a PCI or PCI-e raid controller to handle theses arrays.

Thanks in Advance,

Zen_Silence


Source: (StackOverflow)

CPU Intel Core i7-4790 PCI support

I am planning to buy Intel Core i7-4790 and use it in combination with Asus Z97-AR motherboard. The motherboard has 2 PCI slots, will these be still working with the CPU?

The specs on Intel web site have details on the PCIe ports for the CPU, but PCI is not mentioned at all, which left me worried.

I have an old Creative X-FI PCI sound card, which I really love and don't want to lose the ability to use it.


Source: (StackOverflow)

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Can I use an onboard and pci vga simultaneously?

I have an old machine I'd like to get running with dual monitors. The pci vga only has only 1 output port. However, I have another output via the onboard video card. Can I leverage both video cards to go dual-monitor? How would I set this up?

EDIT: Appears that this is possible but, given the myriad possible combination of mobos and cards, I'll just need to try it.


Source: (StackOverflow)

How to Tell Which Devices are in a PCI Slot

I am trying to figure out what devices are in my desktop computer's PCI slots. I need an open slot for installing a wireless adapter, and I cannot figure out which ones I can take out, and which ones I can't.

If there is a sound device in one of the slots, I have no problem with removing it, as I do not need my speakers for this computer.

Any help with determining which slots have what is appreciated.

Thanks.


Source: (StackOverflow)

What exactly is a PCI-ISA card?

So I got my brand new laptop in for repair, the second time already. They first replaced the system board and returned it to me... Still not working... Now it's been brought in for a second time and this time they're replacing the PCI-ISA card. All fine to me, but what exactly is a PCI-ISA card?

UPDATE

From the repair status page:

Part Number    Part Description
K000099140     PCI ISA CARD

They were trying to resolve the issue as stated here: Strange WLAN adapter behaviour; sometimes not detected


Source: (StackOverflow)

How to map host PCI device to virtualbox?

In a virtual box it is possible to map host's USB device.

But is it not possible to map host's PCI device to guest system?

How is it possible to connect (map) a PCI device to guest OS?

Our host operating system is Ubuntu 8.04 and guest is Windows NT4.


Source: (StackOverflow)

I have a 3.3 Volt PCI ethernet card working on a 5 Volt PCI slot. How is it possible?

This is the design for PCI slots:

PCI Slot desing: note the holes

As you can see, there are 32/64 bits and 3.3/5 Volts.

For what I know:

  • 32 bits PCI cards can work in 64 bits slots of the same voltage.
  • 64 bits PCI cards can work in 32 bits slots of the same voltage.

I don't have an exact image, but this one I have found on internet is very close to the mine (mine has 4 RJ45, not 2) and shows how some of the PCI contacts can stay outside of the slot, and the card will work OK (maybe at a lower speed):

64 bits card in a 32 bits PCI slot

But I have found something strange in a computer (network server) inside an office: a 64 bits 3.3 Volts ethernet card running (working) on a 32 bits 5 Volts slot.

The card is a Quad Ethernet PCI-X 64 bits:

5740 IBM 03N5444 Quad Port 10/100/1000 Base-TX Ethernet PCI-X Ethernet Adapter

Quad RJ45 card

As shown in the PCI design image (see above), a 3.3 Volt PCI card should never fit in a 5 Volt PCI slot, as long as there is a notch (lock, latch or whatever we call it) so the card will never fit in the wrong slot.
But it seems that Attila the Hun was playing with this computer, because the card fitted in the slot. The trick has been to perform a simple cut, as shown in this image:

Cutting ethernet PCI card

This is the photo of the surgery-affected card (sorry, my camera is not very good) :

Ethernet PCI Card with Cut

Beside the funny thing of that trick, what is really awesome for me is that the card is working. And, according to employees in that office, it could be working perfect: the server is dedicated mostly to network traffic, a balance load of 3 DSL routers to 3 different LANs. Even when LAN traffic is very low on that office, there is a lot of internet traffic some days (maybe more than 100 users), so the 4-RJ45 network card should work in a rather intensive manner, or so I think.

I don't know for how long this server has been working with this Frankenstein network card (you know what happens in modern enterprises: everybody is a temporal worker :-P, so they can not tell me), but months at least, maybe more.

So, I have two questions:

  • How is this possible? Why a 3.3 Volt PCI Card running on a 5 Volt PCI slot has not crashed?
  • What could be expected to happen in a future? Strange network behaviors as long as Quad RJ45 circuitry gets melted? Damages to the full system (motherboard, RAM, CPU... etc)? Or... is it possible that nothing will happen?

The motherboard is an HP P5LP-LE (Leonite).

EDIT: I have access to this sort of "network overclocked" machine, and I think I can perform any test that would be needed, like intensive LAN traffic, replace LAN cards to compare, or obtaining info with any program. It runs Windows XP and Ubuntu Linux Server v14.04 LTS. During the nights (when there will be nobody in the offices) I could probably even install some more operating system.

EDIT-2: Here is the detail of the cut. It seems clear to me that it is handmade:

Cut - Front

and the rear side:

Cut - Rear


Source: (StackOverflow)

What are PCI and PCI Express slots used for?

I'm comparing different Micro-ATX motherboards for a home server build and I was wondering what I would use PCI and PCI Express slots for?

Are these used for hard-drives, GPUs, RAID controllers, RAM et cetera?

What kind of PCI slot should I aim for and how many are usually needed?


Source: (StackOverflow)

Recommend a wireless PCI card for Windows 7

I have a crummy RT2500-based 11g card which does work in Windows 7 with the Vista driver (3.2.0.0) but it dies about every two hours or so. Googling around has led me to conclude that Ralink drivers are basically borked, and that I need something else for a stable connection.

Can anyone recommend a suitable wireless adapter? It needs to be:

  1. 802.11g - draft-N nice but not at all essential.
  2. PCI - I already have far more USB devices than can possibly be good for me.
  3. Very reliable.

Money isn't an object within reason.


Source: (StackOverflow)

Can I find out if PCI-e slot is 1.0, 2.0 or 3.0 in linux terminal?

I'm going to purchase a GPU which is for PCI-e 3.0. But since I don't know what PCI-e slot it is in my computer I need to find it out somehow. Is it possible to find it from the terminal in linux?


Source: (StackOverflow)

How is a 1GPBS 64-bit ethernet card different from a 32-bit one?

Given two ethernet cards as follows

When both ethernet cards share the same 1GBPS rating, how are the additional 32-bits relevant? EDIT: Attached link to a few I located on ebay


Source: (StackOverflow)

What type are the screw needed to fix PCI boards?

I miss screws to fix a PCI board in my PC, however I can't find out what type of screw it is. Any hints?

Charles


Source: (StackOverflow)

PCI vs. PCIe wireless network card

I currently have a PCI 802.11n wireless network card (TP-LINK TL-WN951N 300M). Would a PCIe network card improve 1. download speed and/or 2. range (i.e. the bars that windows shows when talking about wireless connectivity in the bottom right corner of the screen)?


Source: (StackOverflow)

Bandwidth of PCI SATA card VS built-in SATA

I have an older HP DL 380 G4 server that I want to utilize as a NAS. Currently it has 6 Hot Swap drives coming in at a measly 36.4 GB each – not exactly a ton of space.

It does have a PCI slot though so I thought installing a SATA card and running an external SATA drive may remedy my space problems.

What I really want to know is how the bandwidth of this setup stacks up to say a built-in SATA controller. Am I losing bandwidth by using the PCI card for SATA capabilities?


Source: (StackOverflow)

Linux: Reading a specific device register

In order to control my backlight, I need to do the following:

sudo setpci -s 00:02.1 F4.B=x

This could be read as:

For the PCI device with the ID 00:02.1, set the register F4 (byte only) to x.

To figure out a value I want for x, I'd like to read its current value (in a script I'm writing). How do I do this?

Early work:

This seems to be the domain of lspci. I tried

sudo lspci -x -s 00:02.1

but this doesn't give enough range (doesn't reach register/address F4). I can do it with the -xxx command line, however. This gives me a dump at which I can see the byte at F4, which I verified I can manipulate with the setpci command. However, the manual says:

  -xxx   Show hexadecimal dump of the whole PCI configuration space. It is  available  only  to  root  as  several  PCI
         devices  crash when you try to read some parts of the config space (this behavior probably doesn't violate the
         PCI standard, but it's at least very stupid). However, such devices are rare, so you needn't worry much.

So I'd rather not put that in a program that runs automatically as root. Any way to just read the value for register F4? A getpci program? A setpci flag? Some special lspci flag I missed?

(Environment is Ubuntu Netbook Remix 9.04 (karmic) (32-bit) on a Samsung N140 netbook)


Source: (StackOverflow)