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• database on SSD: data only or the DBM program too?

  - by simone

  I plan on moving the data I use for statistical analysis (100-ish Gb) onto an SSD. The data is either sqlite single-file db's, or postgresql-managed data. The SSD is 240 Gb, 550 MB/s read and 520 MB/s write. Should I reserve that space for the data only, or would it be a good idea to install the operating system (Mac OS X) and the application directory (Adobe Suite, Microsoft Office and the like) on the SSD too? And would it make a substantial speed difference whether I also install the postgresql binaries on the SSD? I have plenty of other space (another 300Gb hard-drive, and a 1Tb one). Don't know the features of the non-SSD drives, though they're our standard equipment on all Macs, and they're definitely OK. Thanks.

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• Input devices stopped working during system upgrade

  - by amorfis

  Hi, I was upgrading Ubuntu on my server (but Ubuntu is in desktop version) when mouse and keyboard stopped working :( So the screen went black (screensaver), and now I can't do anything. I don't know what stage of upgrade it stopped working, probably now it waits for me to answer some question. Keyboard and mouse were connected by KVM, connecting them directly doesn't help. Both are on USB. What I can do, is connecting to the machine by ssh. Can I somehow see and answer questions of update system and somehow finalize process of upgrade?

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• wi-fi connection drops periodically for a few seconds

  - by sergiom

  I've read the similar question on wireless connections dropping, but no answer seems to apply to my case I have configured the wi-fi lan of my router to broadcast sid and use WPA-PSK. Every few minutes my wi-fi connection drops for a few seconds and then restores. When I use two computers and run a ping -n 50000 on both computers, I see that the connection drops at different times but with almost the same rate. the router is a zyxel, one pc runs windws vista and uses a USB wi-fi device from Belkin: F6D4050 the other one runs windows 7 is a Dell PC with an Intel(R) WiFi Link 5100 AGN there are no other wi-fi lans around

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• What's the best solution for file sharing in my case? DAS or NAS?

  - by jakub

  I want to have in my network small, cheap and energy efficient server with will be fully customizable (Gnu/Linux, OpenBSD). What is more I want to have big, redundant storage in my network and access to it via server. I have already small terminal without hard drive (no SATA/PATA, one drive on USB) which works fine. I don't want to buy big server, or to use regular computer for that. It's not cheap. I thought about a small case (ITX?), and cheap computer in this with SATA ports, but I cannot find anything interesting :( I thought about NAS in network and server independently and booting server from NAS, I'm not sure which technologies will be good for that, and I don't know what with performance. Direct connection to NAS through network from workstation is next pro for that. What do you think about DAS? It will be good for that?

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• W3 Total Cache or WP Super Cache?

  - by javipas

  I'm just preparing the setup of a new VPS where I will migrate a WordPress blog with a good traffic (currently, around 40k pageviews a day), and I was thinking about the caching strategy. I've found different ideas and recommendations, but from previous experiences I will setup a Nginx+PHP-FPM+MySQL (LEMP) system on a Linode VPS. I've read also about setting Nginx as a reverse proxy with Apache, and even using Varnish too, but I don't know if all of this can benefit the speed/performance of the blog (that's the only thing that will be installed on the VPS). The question now is... would you recommend W3 Total Cache or WP Super Cache? I've used W3 on some blogs, but I haven't noticed great benefits and don't need all its options, so I think I could give the veteran WP Super Cache a try. Besides, some users have complained about W3 complex configuration and lack of performance (even consumig more CPU) on some cases.

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• MacBook Pro - 72k vs 54k rpm drives - Heat and Noise

  - by webworm

  I am looking at a new 15" MacBook Pro for development purposes. I am planning to run a Virtual Machine for about 50% of my work (Windows 7 x64, IIS, SQL Server, and VS 2010). The upgrade from a 54000 rpm drive to a 72000 rpm is only $45. From what I understand the faster rotational speed of the 72000 rpm drive will help virtual machine performance. However, I am concerned that additional heat and fan noise might be an issue. I will be running mostly on A/C power so decreased battery life is not a major concern for me. Since I would be running with a Core i7 processor which gives off a fair amount of heat already I was wondering if it might be best to stay at 54000 rpm for the hard drive. What do you all think? Thanks!

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• Transferring existing files from ext3 to ZFS (on FreeBSD)

  - by peppergrower

  I use an old machine as a file server, for backups, and as a testbed for development. I currently have Debian installed, but I'm very interested in FreeBSD because of ZFS: I really, really like its file integrity features. Before I switch, however, I wanted to ask: what's the best way to migrate my ~400GB of files from the current filesystem (ext3) to ZFS? My number-one requirement is that the migration be absolutely reliable: I don't want to lose any data. (I'll be backing it up before doing this anyway, but still.) My secondary goal is speed: I'd rather not have this take overnight if it doesn't have to. Recommendations? Is FUSE for FreeBSD stable enough to use? What about FreeBSD's native read support for ext3? NFS, maybe? How have you done this?

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• Linux for a laptop? [closed]

  - by spriteless

  I would like to install Linux on a laptop. So I have emptied the hard drive, and can boot off a CD. So far I have failed to format the hard drive to Linux, to install Linux, and to change it so that I don't have to hit escape when loading in order to boot from CD (or get Linux on the hard drive and boot to it). The old laptop has 640 MB RAM, 600*800 screen, a CD drive and USB mouse and floppy drives. I eventually mean to use it to look at PDFs if possible, or RTFs that I converted from PDFs if not.

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• What's the best external hard drive configuration for a software developer laptop?

  - by Dan

  I've got a Dell laptop that I use as a software developer box at work and find that the drive is usually the bottleneck. I'd like to hook up two 10k RPM drives that are striped for performance. I've looked for drive cases with RAID but there don't seem to be very many choices and I'm worried about compatibility with the drives (preferably SATA 2). Also I don't have a SATA connection on my machine so it'll have to USB 2.0 for now. Am I headed down the right path or am I missing a much simpler configuration?

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• Installing VMware ESXi 4.0 on Dell 1950: Cannot open vmkboot.gz

  - by rlandster

  I am trying to install VMware ESXi 4.0.0 U1 on a Dell 1950 server via a bootable CD-ROM. I keep getting this error right at the start: Cannot open vmkboot.gz I checked that the CD-ROM drive is not to blame by installing Debian Etch using that drive. I tried several different versions of ESXi (3.5, 3.5 Dell edition, 4.0 Dell edition) and they all give me an error at the same place. I also tried installing from a USB "thumb" drive but got the same error. I checked with the VMware HCL (Hardware Compatibility List) and the Dell 1950 is listed as being compatible. Here are some server details: Two 1.6 GHz Xeon 5110 CPUs (ID: 06-0F-B) BIOS version 2.2.6 Any ideas on what might be the issue?

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• Erase all traces of Windows 8

  - by user1032531

  Just bought a new HP pavilion desktop with Windows 8. I wish to totally remove Windows 8 and all data on the hard drive, remove any windows partitions, delete all data, and then install a fresh Linux. Problem is I can seem to get to boot from USB or boot from CD. It appears that Windows 8 added the following two "features": UEFI which substitutes what we have known as the BIOS Secure Boot which prevents anything but the installed operating system How do I completely and totally erase all traces of Windows 8? Is it still possible to reformat the hard drive? I don't want a duel boot, I don't want to go back to Windows 7, I just want anything Windows gone.

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• How to do simple multitasked loop processing over filenames with PowerShell?

  - by Ville Koskinen

  I'm batch transcoding some 50 GB of video files on a USB hard disk which is connected to a wlan router. The drive is mapped as a network drive on my Windows 7 laptop. The speed handicap of the wlan causes some parts of the processing to become unnecessarily slow, so I would like to do the following with PowerShell: List the names of the files on the network drive to be transcoded Copy the first file to a temporary folder on my laptop Simultaneously Transcode the file in the folder Begin copying the next file from the network drive to the temporary folder After transcoding and copy have both ended, Delete the file which has been transcoded from the temporary folder Begin transcoding next file in the temporary folder Loop until all files have been processed How would I be able to do this with PowerShell? The multitasking part is an obstacle for my skill/persistence combination.

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• WIFI: iPhone/iPad getting much slower bandwidth than laptop

  - by Sam

  I just got cable internet installed (Comcast). It claims that my down speed should be 25mbit. Over wifi, I get close to that on my laptop, but only about 8 on average with my iPhone/iPad. I'm using testmy.net in the browser on all devices. I have an ARRIS / Motorola SurfBoard SB6141 DOCSIS 3.0 Cable Modem and a Medialink Wireless N Broadband Router. I read somewhere that disabling WMM and the firewall on the router would help (is this even a safe idea?). I've tried both, and neither seem to make much of a difference, if any at all (sidebar: I've noticed that my download speeds vary wildly with cable internet... on my laptop, I'll get 12 down, then 22 five minutes later. Is this typical for cable internet?).

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• Navigation keys on numeric keypad randomly stop working

  - by Tom Hughes

  Shortly after a restart, the arrow and navigation (Home, End...) keys on my numeric keypad will randomly stop working, and -- regardless of the state of the NumLock -- return only numbers. I notice this the most in browser applications (like this edit box) but the same effect is true on the command line and in desktop applications like Word. I swapped keyboards and now use a Microsoft keyboard (both are USB keyboards) but the same behavior persists. I also tried a clean boot to clean out startup programs but this made no difference. The separate arrow keys and navigation keys between the QWERTY keys and the numeric keypad work fine, but my strong preference (dating back to DOS and MS Flight Simulator) is to use the navigation keys in the numeric keypad.

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• Do I really need Microsoft Updates?

  - by Tony Wong

  When I install a fresh copy of XP home (bought it from the store.. not a copy) my pc rocks like lightening speed. But when I start installing all the updates, patches & less .NET 4.0 client (As the .NET 4.0 Client seems to bring machine to slow crawl). The pc starts to slow down.. like there is more resources to watch or something in the background is happening. So could I not get away with a awesome virus protector & awesome firewall set-up and avoid all the patches? The machine I have is a quad 4, 4gb ram and 2.3 GHZ process. Tons of room and the machine can run several apps at one time.. but when the updates happen.. its s-l-o-w!

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• Could a too low voltage during long periods damage my computer fan?

  - by Sopalajo de Arrierez

  Computer fans use to run at 12Volt, but most as for today they allow 9Volt or even less to slow down the fan speed (RPM, Revolutions Per Minute). In cases of too low voltage, the fan stops, but I can see it "trying to start again". For example: my Tacens 9dB fan stops at about 10 Volts, but to start it again, 10.5Volt is not enough, and the engine tries to move the fan (I can see a small movement as an "attempt" to move) each 1-5 seconds, but it does not succees, so the fan keeps at 0 RPM. Maybe that "attempt" to move could damage the internal engine of the fan when it last for hours or days?

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• Electricity in VAIO laptop ports while plugged in

  - by SRbH

  I have VAIO E series (SVE) laptop. While charger plugged in, touching VGA/HDMI/USB port metal casing gives me burning sensation. So, i checked it with voltmeter and i found that while plugged in there is presences of DC +1.0 V. Same case with my friend's VAIO E Series (VPCEH). Service center says this is normal. But i do not believe them as it is not the case with Dell Inspiron. Please let me know if you are facing same problem with VAIO and is it hazardous to devices which i connect to these ports (like HDD, LED, etc)?

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• Understanding the Linux boot process, subsystem initialization, & udev rules?

  - by quack quixote

  I'm creating UDEV rules for automounting external drives on a headless server, much in the same way as Gnome-VFS does automounting during a user session. I'm concerned with the rule's behavior at boot-time. There's a good chance one of these drives will be connected during a boot, and I'd prefer any connected drives get mounted in the right place. The drives might be either USB or Firewire, and they are mounted from a shell script fired off by UDEV on detecting an "add". Here are my questions: When UDEV runs the mount for these devices at boot, will the system be ready to mount it? Or will the script get triggered too early? If it's too early, what's a good way for a script to tell that the system isn't ready yet (so sleep a while before checking again)? The UDEV rule matches ACTION=="add". Does this event even fire at system boot?

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• Using a KVM with a Sun Ultra 45

  - by Kit Peters

  I have a friend with two machines: a Mac and a Sun Ultra45. He wants to use a single monitor (connected via DVI) and USB keyboard / mouse with both machines. Try as I might, the Sun box will not bring up a console if the KVM is connected. However, if I connect a monitor, keyboard, and mouse directly to the Sun box, it will bring up a console that I can then (IIRC) connect to the KVM. Is there any way I can make the Sun box always bring up a console, regardless of whether it "sees" a monitor, keyboard, and mouse?

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• Supermicro SmartOS setup issue with HDDs

  - by Andrew B.

  I'm trying to setup SmartOS on my new Supermicro server (SYS-6027R-N3RF4+). I have 8 HDDs + 2 SSDs installed in the hot-swappable drive bays. I have not configured the Intel RAID controller on the machine (it shows no RAID configured, and lists all 8 HDDs). When I boot SmartOS from my USB key for the first time and get to the initial zpool creation I only see 2 disks listed. How can I tell which two drives are being referenced? How can I get SmartOS to recognize all 8+2 drives? Is there a BIOS setting I need to adjust?

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• What contributes to smooth online video streaming?

  - by Wesley

  I had a general question about streaming videos online; in particular, on YouTube. What really is required to smoothly stream videos at 360p or 480p? Then for that HD goodness, what really allows a computer to smoothly stream 720p and 1080p? I'm not too sure whether it's to do with the CPU (speed, # cores, cache size), GPU (chipset, VRAM, memory type) or even HDD (IDE vs SATA). What contributes to the ability to stream regular videos and, furthermore, high-definition videos online?

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• How to build a small network/server at home, basics

  - by Moe

  I'm one class away from my BA IT, I took several classes in general IT. Out of all the books I found just two to be really beneficial. I'm trying to get the hands on experience so my question is.... I want to build a small network in my home, wireless and also wired; printer, laptop, desktop, server (I have 4 1TB external drives of movies/music I want to be available to all computers) Where would I start from building a server with my hard drives, good modem, router, switch port, firewall internet speed/connection etc. This is my first project I want to try.

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• Backup software for Windows Server 2008 R2 Enterprise with 4 virtual machines (Exchange, SQL, AD, SharePoint)

  - by MadBoy

  What are the options for backup software for: HOST - Windows Server 2008 R2 Enterprise with HyperV VIRTUAL - Windows Server 2008 R2 Enterprise with Exchange 2010 VIRTUAL - Windows Server 2008 R2 Enterprise with SQL Express / SharePoint VIRTUAL - Windows Server 2008 R2 Enterprise with Terminal Services (10 users working on it) VIRTUAL - Windows Server 2008 R2 Enterprise with AD/DNS What I'm looking at is possibility of having an offsite backup thru FTP, maybe copy to usb/esata/lan drives for easy taking backup data outside of company. What I've been looking at: - Symantec Exec Backup 2010 System Recovery has an offsite backup but I would need 5 licenses and it doesn't have granular recovery. - Symantec Exec Backup 2010 seems OK but a bit expensive - Microsoft DPM 2010 requires full SQL Standard and for each machine I would need 4 Enterprise licenses. But does it allow Offsite backup without need for additional license and server outside of company (for doing DPM backup of DPM). What other options? This is 10 people company and so the costs matter but also convenience and security. Offsite backup is requirement.

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• Windows XP Disc: corrupt or not corrupt?

  - by Wesley

  Hi all, I just finished one of my builds and am trying to install Windows XP onto it. Here are the specs beforehand... Intel Pentium 4 Northwood 2.4 GHz (512KB L2, 533MHz FSB) QDI Superb 4 Motherboard 2x 1GB PC3200 DDR RAM Seagate 80GB IDE HDD Bestec 250W PSU 16MB NVIDIA TNT2 Pro Samsung DVD-ROM USB 2.0 PCI Card Generic PCI Modem The issue right now is that when I'm running through the Windows Setup from my XP Pro SP3 disc, partway through the setup says that a random file on the disc is corrupt and the computer needs to be restarted. Every time I tried booting it up, a different file was noted as corrupt. However, I tested the same disc on another computer and the Windows XP disc ran to the end of the setup screen without error. I tried this on another computer and the same thing. What could possibly be happening on this one build to cause it errors during the Windows Setup? Thanks in advance.

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• How can I make an actual compact cassette "tape" mix-tape from iTunes?

  - by MikeN

  I want to make an actual compact cassette mix-tape as a gift for someone. I use iTunes to manage all of my music. So a few questions: If I gather a bunch of songs on a playlist for sides A/B of the tape, how can I ensure that the volume for all songs is the same as it plays on the tape? I was thinking of finding an old compact casette recorder and putting the single line sterio output of my Mac to the casette's microphone input. Is that a good way to record onto the actual tape? How long is each side of a compact tape? Is there a default speed the tape plays at? Let's say I want to mesh some songs together so that they will completely fill up one side of a tape (cut off 10 seconds off the end of one song or the beginning of another song), what's the best way to do that?

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