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

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11
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3answers
2k 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 ...
-3
votes
0answers
21 views

What is the chance of a bit being miswritten during a file copy? [on hold]

I'm on Windows 7. I'm copying a huge number of very large files. What is the per-bit chance of a file miswrite during copy? I don't have a good intuition for even the order of magnitude here. ...
1
vote
0answers
29 views

IBM X3850 M2 (7233) server hard drives - Novice help needed

We have just bought a used IBM X3850 M2 (7233) server. The plan being to use it for CFD analysis calculations, taking the workload off our workstations. Not being an expert on these matters... Can I ...
1
vote
4answers
935 views

intel server motherboard S5520HC not booting

This server was working fine when we took it out the rack, now it seems lifeless. I have tried all the normal checks, booted off one cpu, changed memory. When you put power to the board, it turns on ...
-1
votes
2answers
51 views

Parallel disk seek with JBOD

I'm looking to build a 80 TB file based storage system. Ideally, I'd like to do this with a large JBOD and one server with a lot of cores. My question is: Will JBOD containers (like Intel's) allow ...
3
votes
3answers
659 views

How many power circuits do I have in a rack?

I'm planning to get some colocation space from someone in my area, and like most companies that offer colocation, ask about power supplies (of course) in the quote form. I'll need a power of 1000W ...
4
votes
6answers
492 views

What are the the potential drawbacks of using non-OEM hard drives in a server?

I'm currently speccing a Hyper-V host for my company and would like to use solid state drives for local storage. The problem is, most oem drives have a hefty premium when compared to retail ...
13
votes
3answers
6k 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 ...
3
votes
1answer
1k 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
votes
1answer
128 views

HP ML310e Gen8 v2 is really noisy [closed]

I have a ML310e Gen8 v2 and a problem on initial setup the server. The problem is with the Fan noise and speed. The server is fully updated with the latest firmware available from HP and the setting ...
0
votes
0answers
44 views

E5-2667V3 or E5-2640V3 for HP BL460c Gen9 and Oracle Linux 6 + Oracle 12c

We are currently designing a new shared environment (2-4 nodes cluster) which will have: HP BL460c Gen9; OEL 6.6; Oracle 12c database on Oracle Grid infrastructure (with ASM). The plan is to have 8-10 ...
4
votes
2answers
76 views

SAS Expander backplane performance drops when more than 8 drives are active?

We are using an LSI 9211-8i raid controller (flashed in IT mode) in a PCI-e 2.0 x8 slot. It's connected to a supermicro SAS 836EL1 backplane with 1 SFF-8087 cable. We have 16 drives installed. When ...
21
votes
6answers
25k views

Does a 500 watt power supply always use 500 watts of electricity? [closed]

Does a 500 watt power supply always pull 500 watts? Or does it depend on the load being placed on the computer? It's a n00b hardware question. I'm trying to figure out how much it costs to run my ...
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 ...
-3
votes
1answer
75 views

“//” button on hp server case [closed]

I was wondering what the button with the symbol "//" does? I couldnt find much from a google search. It is a HP server case, product number SCS299UP.
7
votes
6answers
3k views

What causes hard disk failures?

What causes hard disk failures in general. I would like to know the common causes and how to prevent such incidence.
0
votes
1answer
42 views

Choose hardware for MySQL server with 1-2k rps [duplicate]

I am looking for new DB server. I'd like to know your opinions and recommendations. Current server spec: We use DB server for website with 100-200 req per sec(i plan growth up to 200-250) Today we ...
-1
votes
1answer
36 views

Possible to cascade HP StorageWorks P4300 G2?

From my understanding HP StorageWorks P4300 G2 is intended to be multiplexed over 1Gb ethernet when used as a SAN, where half of them should be in a remote location. If all 4 are next to each other, ...
2
votes
2answers
229 views

Hardware mods: kludging a conversion from U320 SCSI to SAS/SATA

I apologise if this isn't an appropriate question for this forum. I've an elderly server that works well and that I'd therefore prefer not to scrap entirely. But I would like to replace the current ...
1
vote
1answer
58 views

HP ProLiant dl360 G4 with external backup

We are running a HP Proliant DL360 G4 with external HP Storageworks Ultrium 960 tape drive attached at the moment. Unfortunately the tape drive failed over the weekend and we are looking to upgrade ...
-1
votes
1answer
74 views

What should an Ops person know about hardware for an interview? [closed]

It is easy to find typical interview questions for sysadmins and network engineers, but when I search for hardware engineer (hardware operations engineer) I can't even find one site with typical ...
1
vote
5answers
4k views

New office cabling: should we use CAT7 or CAT6a? [closed]

We are going to do the cabling in our new office building and we are thinking to lay down 10Gbit cables since we use HP switches that come with 10Gbit ethernet ports. We will also lay down few fiber ...
3
votes
2answers
706 views

Is there a way to tell the runtime of a RAM module?

I'm planning on buying used RAM which was supposedly only used for a very short time. However, I'm afraid the seller might underestimate. Is there any way I can confirm the time for which the RAM ...
0
votes
0answers
30 views

Additional hard drive not detected in BIOS

So I'm working on a server which has a Tyan S2937 motherboard, and 2 CPUs. I have a drive bay capable of supporting 6 drives, and the motherboard has 6 SATA connectors. I want to setup the system ...
1
vote
0answers
50 views

IBM Power 750 Express SCAN_ERROR_CHRP message

I'm seeing the following error on my IBM Power 750 Express (8233-E8B) server. From errlog, I see: Sep 15 sysplanar0 P PLAT_DUMP_COMPLETE Sep 15 errdemon T ERRLOG_ON Sep 15 sysplanar0 P ...
1
vote
3answers
312 views

How could I recover data from a physically damaged hard drive?

What hardware do I use to recover data from a physically damaged hard drive?
10
votes
4answers
14k 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 ...
0
votes
1answer
35 views

CPU clarification in vCenter

So i'm running a lab on a Dell PE R410 2 X 4C 2.26Ghz, this evening I saw that vCenter is showing that the processor is @ 2.27Ghz. It's not that big of a deal but was curious as to why there is that ...
0
votes
0answers
46 views

Allow Non-Administrators to Install Specific Devices - Classes

I'm automating driver installation with the use of a central driver store. An important part of this approach is to add the Class GUID's of the devices/drivers to the GPO (Allow Non-Administrators to ...
0
votes
2answers
150 views

HP DL360 vs DL160 Gen9 [closed]

What is the advantages of HP DL360p Gen9 comparing to HP DL160 Gen9? I need server for HFT trading, requirements are: Solarflare or Mellanox network card latency speed one Xeon E5-2690 v3 processor ...
0
votes
0answers
18 views

Is it possible to disassemble an APC Netshelter SX enclosure?

I need to move an APC Netshelter SX 48U from one room to another, but the new room is lower than the current one and I cannot install it without disassembling it. According to APC, these enclosures ...
-5
votes
2answers
83 views

Theoretical hardware recommendation for low-latency infrastructure [closed]

I do algorithmic trading as a hobby, and I'm about to step up my game in terms of latency. I have two questions regarding appropriate hardware and database software. Question 1. Before I will ...
1
vote
1answer
140 views

HP DL380 Gen8 doesn't turn on

We have a HP DL380 Gen8 in one of our data center and it is connected to a UPS, I checked the ILO and know that due to unstable electric powe,r the server has been shutdown with the following error: ...
3
votes
6answers
11k views

What is the recommended temperature range for a hard drive?

What is the best temp to keep harddrives running in? I have harddrives that keep failing due to the temp being to high.
3
votes
2answers
387 views

Upgrading RAID controller to 4kn - do I have to reinitialize the array to use 4kn?

I have an enterprise-grade workstation with an Adaptec 6405E RAID controller in it. According to Adaptec, this RAID controller does not, and will never be able to, natively support 4K disk sectors. If ...
1
vote
2answers
910 views

SMS Gateway Hardware/Software

What would be the best hardware and software to set up a Linux-based SMS gateway using a Sprint texting plan?
6
votes
5answers
2k views

SW SSD Raid 1 over HW RAID 10

A provider(data center) recommended I go with 1TB SSDs in a software RAID 1 over HW RAID 10 with mechanical drives. Their quote: Typically SSDs are most reliable than RAID cards and since you ...
1
vote
2answers
71 views

Can I take a mirrored raid drive and use it in another machine

I have about a dozen low end servers of varying makes and models and most have mirrored raid. I'm a bit confused about whether after a disaster (that hasn't harmed the drives) can I can take a drive ...
0
votes
6answers
3k views

How to troubleshoot a black screen (no video) on boot?

On a related question to this one, now I have a file server whose power supply and fans spin up, but gets no video and no beep codes. I have tried two different video cards in the system, and neither ...
5
votes
2answers
416 views

Which STONITH hardware for power fencing?

I'd like to setup a two node high availability cluster using corosync/pacemaker/drbd. For that, of course, I need fencing. As far as I understand, all IPMI/iLO/... solutions do the job, but only as ...
0
votes
1answer
78 views

Windows server 2012 R2 drivers for Fujitsu CELSIUS R930 Power

I'm trying to install Windows Server 2012 R2 on a Fujitsu CELSIUS R930 Power workstation and have problems finding the right drivers. Fujitsu "tech support" won't help me - they don't support server ...
1
vote
1answer
46 views

lvm and hardware raid: hardware raid 5 and raid 1 in single volume group?

I have a system with pre configured hardware RAID. It has 2 disks in a RAID1 configuration. It has a further 6 disks in a RAID5 configuration. The 6 disk RAID5 is split (by the hardware) to look like ...
0
votes
1answer
60 views

Put NIC under heavy load [closed]

I think I've got a faulty NIC so I want to put it under heavy but controlled load to see if and when it dies. How can I generate such a load? The NIC is in a Hyper-V host with Windows and Linux ...
9
votes
5answers
10k views

Should I be concerned about a high SMART Hardware_ECC_Recovered value?

I got such a message in /var/log/messages: Jun 25 06:29:27 server.ru smartd[4477]: Device: /dev/sda, SMART Usage Attribute: 195 Hardware_ECC_Recovered changed from 46 to 47 #smartctl -a /dev/sda: ...
1
vote
4answers
173 views

Hardware Solution to connect to multiple ISPs for one WAN

I'm looking for a piece of hardware to connect to different types of ISPs, normal DSL, cable DSL and USB egde sturfstick to offer one Internet connection with a higher cumulated bandwidth. I'm pretty ...
15
votes
4answers
55k 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 ...
1
vote
1answer
570 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] ...
0
votes
2answers
1k views

Uncorrectable Machine Check Exception on HP DL360 G7

i have about every hour in IML (hplog) from HP DL360 G7 record: CRITICAL: CPU - Uncorrectable Machine Check Exception (Board 0, Processor 1, APIC ID 0x00000003, Bank 0x00000005, Status ...
0
votes
2answers
82 views

1 x Raid card and 6 sata drive over 1 SFF-8087 port [closed]

I have a question regarding LSI00328 LSI MegaRAID SAS 9271-4i Can I connect 6x sata drives to -4i card or I need -8i version
1
vote
1answer
256 views

HP ProLiant DL380 G6 with 2 x Intel x5650 CPUs

I have an old HP DL380 G6 server, I am trying to upgrade the processor. I added 2x X5650. but each time I powered the server on, the fans stat working loudly and keep like that. the server never never ...