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• Beeping Hard Disk - Seagate 250GB Momentus 5400.6

  - by Pez Cuckow

  I have been trying to repair a laptop that simply beeps instead of booting. After taking it apart I have now realised that it is the hard disk beeping. I know that sound strange but I guarantee that is what it is! (Currently powered on it's own with a Sata Mains lead). The beeping is slightly faster than one per second there is a link to a recording below: http://www.pezcuckow.com/files/BeepingHardDisk.m4a This recording was made resting the mic on the hard disk while it was sat on a table on it's own, there are no speakers anywhere near, the sound is coming from the hard disk. Does anyone know what this beep means? Is the hard drive just dead, or is it fixable and the data recoverable? Many thanks,

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• New host, high load?

  - by dotancohen

  A few minutes ago I signed up at a new webhost. I have yet to move my sites over. Upon initial SSH connection, I checked the load and memory usage, they do seem rather higher than I would like: # uptime 12:06:51 up 71 days, 23:23, 1 user, load average: 9.02, 9.49, 9.45 # free total used free shared buffers cached Mem: 33014800 31927192 1087608 0 2384812 17729816 -/+ buffers/cache: 11812564 21202236 Swap: 16787916 8584 16779332 Is that a bit to packed? I'm only paying about $5 USD per month, so I don't expect <0.1 loads, but ~10 is worrisome. Is it not? Also, there is no /etc/issue file so I tried other methods to guess the OS: # uname -a Linux box358.bluehost.com 2.6.32-20120131.55.1.bh6.x86_64 #1 SMP Tue Jan 31 15:43:27 EST 2012 x86_64 x86_64 x86_64 GNU/Linux # which yum /usr/bin/yum # which apt-get # That looks like CentOS / RHEL 6.2 possibly?

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• Limit disk I/O one program creates?

  - by Posipiet

  Hardware: one virtualization server. Dual Nehalem, 24GB RAM, 2 TB mirrored HD. Software: Debian, KVM, virt-manager on the server with several virtual machines that use Linux too. 2 TB Disk is a big LVM, each VM gets a logical volume and makes its own partitions in that. Problem: One of the programs that runs on one of the VMs creates huge disk load. This never was an issue, because the program never ran on such a powerful hardware. Now the CPUs are fast, and lots of I/O is the result. We cant do much against that at the moment, because the tool is a black box. On the other hand, the speedy computation is welcome. The program creates about 5 GB of temp files which get overwritten during the next iteration. Question: How can we limit the disk I/O for the process?

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• How to detect which edges of a rectange touch when they collide in iOS

  - by Mike King

  I'm creating a basic "game" in iOS 4.1. The premise is simple, there is a green rectangle ("disk") that moves/bounces around the screen, and red rectangle ("bump") that is stationary. The user can move the red "bump" by touching another coordinate on the screen, but that's irrelevant to this question. Each rectangle is a UIImageView (I will replace them with some kind of image/icon once I get the mechanics down). I've gotten as far as detecting when the rectangles collide, and I'm able to reverse the direction of the green "disk" on the Y axis if they do. This works well when the green "disk" approaches the red "bump" from top or bottom, it bounces off in the other direction. But when it approaches from the side, the bounce is incorrect; I need to reverse the X direction instead. Here's the timer I setup: - (void)viewDidLoad { xSpeed = 3; ySpeed = -3; gameTimer = [NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(mainGameLoop:) userInfo:nil repeats:YES]; [super viewDidLoad]; } Here's the main game loop: - (void) mainGameLoop:(NSTimer *)theTimer { disk.center = CGPointMake(disk.center.x + xSpeed, disk.center.y + ySpeed); // make sure the disk does not travel off the edges of the screen // magic number values based on size of disk's frame // startAnimating causes the image to "pulse" if (disk.center.x < 55 || disk.center.x > 265) { xSpeed = xSpeed * -1; [disk startAnimating]; } if (disk.center.y < 55 || disk.center.y > 360) { ySpeed = ySpeed * -1; [disk startAnimating]; } // check to see if the disk collides with the bump if (CGRectIntersectsRect(disk.frame, bump.frame)) { NSLog(@"Collision detected..."); if (! [disk isAnimating]) { ySpeed = ySpeed * -1; [disk startAnimating]; } } } So my question is: how can I detect whether I need to flip the X speed or the Y speed? ie: how can I calculate which edge of the bump was collided with?

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• GLP for Pillar Axiom 600 Storage System Implementation Specialist

  - by uwes

  Now availabe at OPN Competency Center. The guided learning path provides you with an overview of the Pillar Axiom 600 storage system, and the technical details that you need to become a Pillar Axiom 600 Storage System Certified Implementation Specialist.  Learn more, go to: Pillar Axiom 600 Storage System Implementation Specialist.

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• Using physical disk with VMware Workstation

  - by chx

  I am using VMware Workstation 9.0 under Windows 7 and trying to load my Linux from Physicaldisk0. And it boots, grub sees the two partitions on the disk (I checked in command line) and the kernel and the initrd loads and then it stops saying "device not found"and drops me into an emergency shell. Indeed there is absolutely nothing in /dev not the /sda device it expects not /hda nothing that looks like a disk. Edit: I can boot the Linux disk just fine if I boot it from BIOS and not as a VM. Edit2: The question is, how can I make this setup work?

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• How difficult is it to change from Embedded programming to a high level programming [on hold]

  - by anudeep shetty

  I have a background in Computer Science. I worked on Embedded programming on Linux file systems, after I finished my Bachelor's degree, for over a year. After that I pursued my masters where most of my course choices involved working on web, java and databases. Now I have an offer to work with a company that is offering a job to work on the OS level. The company is pretty good but I am feeling that my Masters has gone to waste. I wanted to know is it common that a Computer Science major works on low-level coding and is there a possibility that I can work in this company for some years and then move onto an opportunity where I can work on high-level coding? Also is working on low-level programming a safe choice in terms of job opportunities?

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• Virtual PC lost parent disk for differential vhd

  - by SeeR

  2 years ago I had that brilliant idea to create base Windows XP disk which all of my VM with XP will use. Of course it ended that I had only one VM with XP :-). Today I needed to make some free space on my HDD so I found one not used VM named "Windows XP" which had only 5GB. I deleted it as fast as possible :-) and of course I used shift to not use "Recycle bin". Now when I want to run my XP VM I have following error: "One of the parent hard disks of ... is missing." It's not a problem for me as soon as I can restore files from this differential vhd that I have right now. So: I have differential disk with files I need I don't have parent disk My question is: How can I restore files from this differential hvd?

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• Technical Integration Roadmap for OBI11g and Oracle Hyperion EPM System

  - by Mike.Hallett(at)Oracle-BI&EPM

  There is an excellent technical whitepaper on the integration roadmap for Oracle business intelligence enterprise edition and the Oracle Hyperion enterprise performance management system  (download at this link).  This document lists the integration points among all current releases of Oracle BI EE with EPM System releases: with live links to other relevant documentation also provided. You may also be interested in the overall Hyperion EPM System Documentation Resources which can be found from the Doc Portal. And, there are two new tools for EPM @ MyOracleSupport  {this needs your oracle logon} : Cumulative Feature Overview Tool This new tool offers a simple way to determine the features developed between releases to assist you in your upgrade implementations. The tool helps you to plan your upgrades by providing concise descriptions of new and enhanced solutions and functionality that are added between your current and target releases. With the Cumulative Feature Overview Tool, you can quickly and easily find information about new features for each EPM System product. Defects Fixed Finder Tool This new tool provides an efficient way to review the defects fixed in patch set updates, patch set exceptions, and patch sets for major releases, starting with Release 11.1.1. The tool helps you plan patch implementations by providing concise descriptions of defects fixed after your current release. The Defects Fixed Finder enables you to easily find information about defects fixed for each EPM System product.

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• Is it a waste of time to free resources before I exit a process?

  - by Martin

  Let's consider a fictional program that builds a linked list in the heap, and at the end of the program there is a loop that frees all the nodes, and then exits. For this case let's say the linked list is just 500K of memory, and no special space managing is required. Is that a wast of time, because the OS will do that anyway? Will there be a different behavior later? Is that different according to the OS version? I'm mainly interested in UNIX based systems, but any information will be appreciated. I had today my first lesson in OS course and I'm wondering about that now.

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• Web Based Project Management System

  We are very well aware about the software development life cycle and project management system. But many of the developers assume that it is available only as desktop application. But now a days there are many online web based project management tools are available in market. In this article I am providing information about what is web based project management system, the available open source web based PMS and the benefits of using web based project management system for business owners.

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• mount old ATA disk to USB adapter

  - by 213441265152351

  I am trying to recover data from an old Linux that was installed in a computer on an ATA hard drive. I found a ScanLogic USB-IDE, an ATA adapter to USB 1.0 similar to the one in the picture: and after switching it on, I plugged it into a laptop with Ubuntu 12.04. I am used to the drives being automatically mounted, but this one doesn't show up in /media. After doing a dmesg, all I got is this: [215298.671924] usb 2-1.1: new full-speed USB device number 5 using ehci_hcd [215298.767330] scsi19 : usb-storage 2-1.1:1.0 [215299.841701] usb 2-1.1: reset full-speed USB device number 5 using ehci_hcd [215300.017258] usb 2-1.1: reset full-speed USB device number 5 using ehci_hcd [215300.197050] usb 2-1.1: reset full-speed USB device number 5 using ehci_hcd [215300.372730] usb 2-1.1: reset full-speed USB device number 5 using ehci_hcd I tried plugging in the adapter to the three different USB ports in my laptop (one of them USB 3.0), but got no luck with any of them. Any ideas?

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• Hard Disk Spins Down as long as Battery is in Laptop

  - by Brock Dute

  Hi, I just figured out today that as long as the battery is in my laptop, it doesn't matter if it's fully charged while plugged in, Ubuntu always spins down my hard drive. I noticed this because there was a huge difference in speed when I removed the batteries. My settings for power management is basically: on AC power, don't spin down harddrive, dont suspend or anything on battery power, basically save as much power as possible I assumed that if I plug in my laptop, it'll use the On AC Power settings no matter what but apparently, this isn't so. Is there a way to "fix" this?

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• Rail's FileStore with Linux Disk Caching or RAMdisk?

  - by Yo Ludke

  I have a Ruby on Rails application that stores it's catched files on the filesystem (Rails file-system cache). I was thinking about changing to memcached Store, but a short test shows it isn't a big difference in speed. From linuxatemyram.com I learned a bit about file caching. On the current machine there would be around 40..45GB RAM left which isn't needed for the application and which can be used to linux-disk-cache this rails file cache store. The disk is a RAID10 system with almost 120MB disk perfomance. How can I tell Linux to use free RAM more deliberately and not to be shy about using it? Do think it's necessary to adjust a sysyctl/.. value here, or would I have performance advantages to put the File Store root diretory on a ramdisk? (Loosing the cache during a reboot wouldn't be a problem)

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• Unwanted Chinese language got set in system settings

  - by Registered User

  I was discussing on the Ubuntu users list how to type in in Hindi (Indic language) in Libre Office and about a package installation problem. I have made some changes in system settings, following suggestions by some users. However, this morning when I did a reboot I am unable to see English as my default language. My system is showing some Chinese characters which I do not understand. All I wanted was to use Libre Office for a particular document in Hindi. What happened is that even Gmail is opening in Chinese. The system settings folder and others are also opening in Chinese. I am unable to use the system now. I have uploaded the snapshots here: please have a look. Upon a reboot, I was asked to rename all folders. Gmail opening in Chinese This is how menu on my system looks: half English and half Chinese Notice that in the third snapshot the calendar and menu are appearing in Chinese. I want the original US English menus and folder names back. I just wanted to type a document with Lohit Hindi font in Libre Office. I use Ubuntu 11.10. I do not use Unity, only Gnome desktop. I installed gnome-session-fallback a long time back and have been using that ever since. How do I get back to all English submenus and English folder names? I have a US English Keyboard and I use only US English. This thing which is now somehow set is unwanted.

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• Interview: "Oracle and Sun, Engineering from Applications to Disk"

  John Fowler, executive vice president of systems at Oracle, talks about Oracle's acquisition of Sun and what it means for customers.

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• Looking for a disk manager that has options for setting allocation sizes in paritions

  - by mango

  I'm looking for a GUI program that is compatible with Ubuntu 13.10 - Server X86-64 that has all the features of Gparted but also allows for setting custom allocation sizes when creating a partition. Eg: Ability to create a 4gb Fat32 parition with 32 kilobyte allocation size. Please don't suggest a terminal only application, no matter how awesome it might be, because that's not what I asked. Wow, I come off like a right up prick when I write, eh?

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• Code base migration - old versioning system to modern

  - by JohnP

  Our current code base is contained in a versioning system that is old and outdated (Visual Sourcesafe 5.0, mid 1990's), and contains a mix of packages that are no longer used, ones that are being used but no longer updated, and newer code. It is also a mix of 4 languages, and includes libraries for some of our systems (Such as Dialogic, Sun Tzu {clipper}) implementations. This breaks down into the following categories: Legacy code - No longer used (Systems that have been retired or replaced, etc) Legacy code - In current use (No intentions for upgrades or minor bug fixes, only major fixes if needed) Current code - In current use, and will be used for future versions/development Support libraries - For both legacy and current code (Some of the legacy libraries are no longer available as well) We would like to migrate this to a newer versioning system as we will be adding more developers, and expanding the reach to include remote programmers. When migrating, how do you structure it? Do you just perform a dump of all the data and then import it into the new system, or do you segregate according to type before you bring it into the new system? Do you set up a separate area for libraries, or keep them with the relevant packages? Do you separate by language, system, both? A general outline and methodology is fine, it doesn't need to be broken down to individual program level.

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• Programs keep waiting for external disk to spin up - how to ignore disk?

  - by Andrew J. Brehm

  Like many Mac users I have an external Firewire disk hooked up to my Mac to be used by Time Machine. This works very well, backup-wise. The problem is that very often when I use a Mac application and try to open a file, the file selection dialogue window hangs until the external disk has spun up. I never ever want to open a file on the external disk. Sometimes this happens even when I just want to save a file I already saved (i.e. type something and press meta-s). Is there anything I can do about this?

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• System doesn't boot when ubuntu is installed on an SSD

  - by Caetano Nichnich Nunes

  I've recently discovered Ubuntu and decided to give it a try. I am using a Samsung Series 5 p530u3c-ad1 which comes with a 24gb SSD and a ~500gb HDD, My intention is to set the system files to the ssd and the rest to the HDD. The system works fine if I do a direct install using only the HDD, but if I try using the SSD for the system files the computer doesn't boot-up, I do not know if the SSD is being recognized by the computer, I think so because I could install Ubuntu on it, but it doesn't appear on the boot order or the boot menu. I read some posts and tried using boot-repair which pointed me not to forget to set my system to boot from my SSD, unfortunately I cannot because of the issues mentioned above. Thanks for your time.

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• PowerShell create new Azure VM from uploaded disk (not image)

  - by MikeBaz

  I have a VHD in Azure storage. That VHD is configured as an OS disk through a command like the following: Add-AzureDisk -DiskName $newCode -MediaLocation "http://$script:accountName.blob.core.windows.net/$newCode/$sourceVhdName.vhd" ` -Label $newCode -OS "Windows" I would like to create a new VM pointing at that disk. From what I can tell if I was doing this with an image I would do something like: New-AzureVMConfig -Name $newCode -InstanceSize $instanceSize ` -MediaLocation "http://$script:accountName.blob.core.windows.net/$newCode/$sourceVhdName.vhd" -ImageName $newCode ` | Add-AzureProvisioningConfig -Windows -Password $adminPassword ` | New-AzureVM -ServiceName $newCode However this is wrong for me because I don't have an image - I have a configured VHD that is not sysprepped and can't be. How can I create the VM in PowerShell to point at the existing disk like I can through the portal?

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• High disk time on sql-server

  - by Patrik

  Hi We have a dedicated sql-server 2008 r2 enterprise edition. The setup is: D: (data files) - stored on local ssd disks (not the same disks as log files) (raid 10) E: (log files) - stored on local ssd disks (not the same disks as data files) (raid 1) F: (transaction log backup) - stored remote on a SAN Today we moved our log files to new disks (from F: to E:). From a shared volume ( F:(SAN)) to dedicated local disks (E:). What then happend was that the "disk time", "avg. transfer time" and "avg disk write queue length" increased on the volume where we have the data files (D:) (not on the volume where the log files are located). The data volume and log volume does not share disks, however they share the same controller card. "Disk idle time" is low for all volumes. One thought is ofcourse that the controller card might be overloaded. But, we need more ideas on where the problem might be.

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• Location of development solutions on disk - Common or upto the individual

  - by dreza

  In our team meeting today a senior member brought up the proposal that we should be having a common location/structure for our development solutions. A couple of his points were: Making it common meant when talking about projects and emailing stuff everyone is on the same wavelength and knows where to look. If there is ever the need to hard code a location path then it will work across all developers pc's. He had a more few points to back up his suggestion but I unfortunately got distracted during the discussion and so didn't hear all of them. I have no issue with the idea and can see it's merits but I was wondering if it is common or even recommended that all developers place their code in the same folder structure. Or do developers like to have the flexibility of location solutions where-ever they want? We currently use SVN for our version control. In this case his recommendation was to place all code in: c:\Work\Development\<Customer>\<project>\Code\<solution>\ the code I guess actual path is irrelevant for this question but added for completeness.

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• Safe BIOS upgrade run from external USB-HDD and not native OS

  - by ecoologic

  I have a Toshiba M200 laptop which came with Windows Vista. After buying it, I replaced the OS with XP and recently I swapped the internal hard disk with a bigger one where I only have Ubuntu. So now I can boot XP from the external USB hard disk. There's a BIOS update available (2.3 against my 1.8) which I'd like to install and there's also a version for XP. Is it "reasonably" safe to install this upgrade for Windows XP (despite the original OS was Vista, the laptop model is the right one) from my external USB hard disk with Win XP?

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• What are best practices for testing programs with stochastic behavior?

  - by John Doucette

  Doing R&D work, I often find myself writing programs that have some large degree of randomness in their behavior. For example, when I work in Genetic Programming, I often write programs that generate and execute arbitrary random source code. A problem with testing such code is that bugs are often intermittent and can be very hard to reproduce. This goes beyond just setting a random seed to the same value and starting execution over. For instance, code might read a message from the kernal ring buffer, and then make conditional jumps on the message contents. Naturally, the ring buffer's state will have changed when one later attempts to reproduce the issue. Even though this behavior is a feature it can trigger other code in unexpected ways, and thus often reveals bugs that unit tests (or human testers) don't find. Are there established best practices for testing systems of this sort? If so, some references would be very helpful. If not, any other suggestions are welcome!

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