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

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9answers
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Notebook for Sysadmin

For those of you who still not tired of "XYZ for sysadmin" questions: This subject is bothering me for a long time. I had number of problems selecting notebook for job. For example: Notebook vs ...
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14answers
15k views

Why would wireless routers become less reliable over time?

I've been curious about this for awhile now. I don't know if I'm seeing a real pattern or not, but having worked with many home office/small office wireless routers for a few years now, I've noticed ...
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15answers
9k views

Build a low-power file server

I would like to build a file server for backups. The server needs to be available 24/7 in a mixed Windows/Linux network, but service should not exceed 1 hour per day. Thats why power consumption is my ...
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4answers
1k views

Copy Linux host to new hardware

I need to do host to host migrations from old hardware to new hardware. Specifically, from HP BL460G7 to HP BL460G8. Both the old and new servers have 2 x 600GB 2.5" drives and are configured for ...
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6answers
16k views

How to recover from a drive failure in a RAID 5 configuration?

This morning a drive failed on our database server. The drive array (3 disks) is setup in a RAID 5 configuration. While we wait for a drive replacement we are preparing for a recovery strategy. Users ...
13
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1answer
34k views

What's the bandwidth and form factor for PCIe x1 x4 x8 and x16?

What speed, number of pins (physical size) are PCIe x1 x4 x8 and x16? Normally I would google to find a photo showing the various types of PCI Express cards and their max bandwidth. Now that ...
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7answers
3k views

Understanding NVMe storage and hardware requirements

I'm a bit confused about the recent developments in PCIe-based storage, particularly as it relates to the NVMe specification and its hardware compatibility. While I've worked extensively with SSDs in ...
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16answers
16k views

Computer in cold and damp environment (a shed) [closed]

Background I am hoping to convert a shed in my garden into a home office. The shed has a concrete base and brese block walls. It already has Power and Ethernet and will soon be watertight. However I ...
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8answers
9k views

What hardware makes a good MongoDB Server ? Where to get it?

Suppose you're on dell.com right now and you're buying a server to run your MongoDB database for your small startup. You will have to handle literally tens of thousands of writes and reads per minute ...
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3answers
2k views

What does “low profile” stand for, connected to hardware?

When it comes to hardware I often read something like "Apple Mac computers, and other lower profile ...." For me it sounds like a better word for low end segment hardware but I am not sure about it. ...
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6answers
684 views

Bad disks in ancient server

I have a 1998-era Netware 3.12 server that runs everything on our campus: general ledger, purchasing, payroll, student information, grades, you name it. The server has an Adaptec RAID controller with ...
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5answers
13k 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: ...
12
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3answers
10k views

Quick method to determine SSD drive health?

I have an Intel X-25M drive that was marked "failed" twice in a ZFS storage array, as noted here. However, after removing the drive, it seems to to mount, read and write in other computers (Mac, PC, ...
12
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7answers
2k views

How do I inventory the type and speed of a remote computer?

I'm on a Windows 2003/2008 corporate network with 100 users. I've been tasked with increasing the RAM on all end-user workstations. The problem is we have a mixture of different computers in our ...
12
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3answers
6k 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 ...
12
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2answers
6k views

Alternatives to Dell's mirrored SD card module for booting a small OS from flash?

Dell offers an add-on hardware card for some of their servers that provides a poor man's RAID1 between two SD cards (one card gets all the reads until it dies, writes are mirrored) for booting a ...
11
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4answers
784 views

Why is a 19“ rackable box only 17” wide?

I'm about to buy (for the first time obviously) a bare rackable box to build a server. As I understands things, standard rack size is 19" wide. But some boxes specs (Antec's one to be specific) says ...
11
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9answers
3k 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 ...
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4answers
24k 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 ...
11
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3answers
6k views

Why are Large Form Factor (LFF) disks still fairly prevalent?

Small Form Factor (SFF) / 2.5" disks seem to have become more popular than LFF disks now due to them being preferable over LFF disks in many scenarios (lower power consumption, higher density, etc). ...
11
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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 ...
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2answers
585 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 ...
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2answers
2k views

Using 48v for servers

I'm currently in the middle of a process to specify and design a new server environment for graphics and video rendering. We know we want to use blades, and we're pretty sure of our vendor decisions. ...
11
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2answers
760 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. ...
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10answers
1k views

Is there a reason to change a server's hard drive before it faults?

Just a quick question: is there a reason to change a server's hard drive after x years before it faults (it eventually will at some point) or should I just leave it until it faults? I have little ...
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4answers
11k views

What effects do magnets have on HDDs and SSDs? [closed]

What do magnets do to hard disk drives and solid state drives upon contact?
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4answers
13k 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 ...
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2answers
21k 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 ...
10
votes
1answer
987 views

What is the term for this piece of hardware?

This is a silly question but what is the "official" term for what is carrying this hard drive? I need to know if I can purchase it separately from the hard drive.
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6answers
2k views

Laptop waking from sleep

I have a laptop which has "recently" turned into the proverbial baby, and refuses to sleep through the night, or for that matter, through some days. I'm a little lost when it comes to trying to debug ...
10
votes
4answers
478 views

How Serviceable are Tape Drives?

I'm contemplating an auto-loading tape drive as part of a backup strategy. This would be my first experience with tape backup. The cost-effectiveness of tape drives seems to depend on the assumption ...
10
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4answers
5k views

Hard drive read errors that… stop?

My story starts out quite simply. I have a light-duty server, running Arch Linux, which stores most of its data on a RAID-1 composed of two SATA drives. It was working without any problems for about ...
10
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1answer
341 views

Standard Bolt Pattern for Racks in Datacenters

Is there a "standard" way of bolting racks down that is interchangeable between vendors? At our datacenter we've standardized on a Damac rack for our builds. Because we're building in volume, the ...
10
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1answer
6k views

Recommendations for Elastic Search hardware [closed]

Are there any good guides for hardware level to support ElasticSearch? Are recommendations for Lucene or Solr a good place to start? We're looking at rolling out a deployment starting with 27 ...
10
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2answers
762 views

How can I tell if the server supports hot-swapping drives?

I recently purchased a used server (the type that fits into a rack, rather than a free-standing machine). One nice feature, is rather than having to open up the cover and unscrew the harddrives, this ...
9
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13answers
25k views

Whats the average lifespan of a server?

i'd really like to know what the lifespan of a server is, or could be. Is there something like lifespan in the world of PCs at all? Lets assume it runs 24/7, how many hours/days/years/etc could it be ...
9
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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 ...
9
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4answers
3k views

DIY Hadoop Cluster - Heat & Dust issues?

Following are links of my DIY 6-Node Hadoop Cluster using i3 Machines, What is the best possible way to protect my design from dust & provide better heat transfer? What should I use to cover ...
9
votes
5answers
4k views

Rack layout recommendations

We have a 24U rack in our lab and I'm going to completely redesign it during the next weeks due to the scheduled big hardware upgrade. I have a couple of the questions about the layout of the server ...
9
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3answers
640 views

General Advice about an archive solution. ~15tb and growing.

I need a better storage and archive system for my small business's files. Specifically the files are completed video projects. Beyond time and cost limitations what is holding me back is I don't ...
9
votes
4answers
12k views

High load on a nagios server — How many service checks for a nagios server is too many?

I have a nagios server running Ubuntu with a 2.0 GHz Intel Processor, a RAID10 array, and 400 MB of RAM. It monitors a total of 42 services across 8 hosts, most of which are checked using the ...
9
votes
1answer
2k views

Proper method for connecting multiple non-stackable network switches?

I deal with many clients in warehousing and industrial applications who have IT staff or local consultants. Many of these sites are still using a 10/100 Megabit switching backbone... I've managed to ...
9
votes
2answers
2k views

Is post-sudden-power-loss filesystem corruption on an SSD drive's ext3 partition “expected behavior”?

My company makes an embedded Debian Linux device that boots from an ext3 partition on an internal SSD drive. Because the device is an embedded "black box", it is usually shut down the rude way, by ...
9
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4answers
23k 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 ...
9
votes
2answers
9k views

Is my Cisco switch port bad?

I've been chasing a packet-loss and network stability issue for a handful of end-users on an internal network for the past few days... These issues surfaced last week, however the location was struck ...
9
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2answers
70k 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?
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5answers
1k views

Hot spare host vs cold spare host?

We have several hosts where we have an identical hot spare host, which is patched and updated so it is very close to have to same software and config. In case of failure the network cable is switched ...
8
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7answers
59k 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.
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4answers
2k views

The importance of ECC memory

Are ECC memory modules important to have on a non-critical server? I was thinking about getting myself a toy dedicated server for lots of random, non-critical stuff. Sporadic reboots are no big ...
8
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10answers
21k views

Where to purchase a server capable of 512GB of RAM? [closed]

Where can I purchase a single server capable of 512 GB, yes GB, of RAM? The most I've seen is 256 GB (32 DIMM x 8 GB per stick)