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  • vSphere education - What are the downsides of configuring virtual machines with *too* much RAM?

    - by ewwhite
    VMware memory management seems to be a tricky balancing act. With cluster RAM, Resource Pools, VMware's management techniques (TPS, ballooning, host swapping), in-guest RAM utilization, swapping, reservations, shares and limits, there are a lot of variables. I'm in a situation where clients are using dedicated vSphere cluster resources. However, they are configuring the virtual machines as though they were on physical hardware. In turn, this means a standard VM build may have 4 vCPUs and 16GB or more of RAM. I come from the school of starting small (1 vCPU, minimal RAM), checking real-world use and adjusting up as necessary. Some examples from a "problem" cluster. Resource pool summary - Looks almost 4:1 overcommitted. Note the high amount of ballooned RAM. Resource allocation - The Worst Case Allocation column shows that these VMs would have access to less than 50% of their configured RAM under constrained conditions. The real-time memory utilization graph of the top VM in the listing above. 4 vCPU and 64GB RAM allocated. It averages under 9GB use. Summary of the same VM What are the downsides of overcommitting and overconfiguring resources (specifically RAM) in vSphere environments? Assuming that the VMs can run in less RAM, is it fair to say that there's overhead to configuring virtual machines with more RAM than they need? What is the counter-argument to: "if a VM has 16GB of RAM allocated, but only uses 4GB, what's the problem??"? E.g. do customers need to be educated? What specific metric should be used to meter RAM usage. Tracking the peaks of "Active" versus time?

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  • Screen going black, further investigation reveals healthy ram and hard disk, and several kernel oops logs

    - by Virulan
    Six days ago, I went to go take a shower, and I suspended Ubuntu as usual, to save battery life. I came back, and the screen was black. REISUB and general fiddling around did nothing. Restarted, and still had nothing on the screen. Since then, this has happened several times, and the only fix is to 1) force shut laptop, 2) take out battery, 3) hold power button, 4) put battery back in, 5) boot. I have investigated further into the matter, doing a ram test and a hard disk check. Both turned out fine, but then my attention turned towards the error messages I was receiving upon bootup, the whole "System program problem detected" dealio. I did some digging and found four kernel oops logs in my /var/crash. What I can understand of them points to two things, 1) they are connected to my suspending problems, since there are four them (I have had four suspending crashes), and they both confirm that there was a issue with waking up from suspend, and 2) the crashes might have to do with Python (possibly could be jumping to conclusions), since mentions of Python are peppered throughout the logs. At this point, I am unsure of how to continue, and I have come here for help. Is there any way I can fix this? Should I start by uploading the logs here?

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  • Determining how all memory is used in Windows Server 2008

    - by Mojah
    Hi, I have a Windows Server 2008 system, which has 12GB of RAM. If I list all processes in the Task Manager, and SUM() the memory of each process (Working Set, Memory (Private Working Set), Commit Size, ...), I never reach more than 4-5GB that should be "in use". However, task manager reports this server has 11GB in use via the "Performance" tab. I'm failing in determining where all that used RAM is going. It doesn't seem to be system cache, but I can not be sure. It might be a memory leak in one of the appliances, but I'm struggling to find out which one. The server's memory keeps filing up, and eventually forces us to reboot the device to clear it. I've been reading up on how RAM assignments work on Windows Server: RAM, Virtual Memory, Pagefile and all that stuff: http://support.microsoft.com/kb/2267427 What's the best way to measure? http://www.zdnet.com/blog/bott/windows-7-memory-usage-whats-the-best-way-to-measure/1786 Configure the file system cache in Windows: http://smallvoid.com/article/winnt-system-cache.html But I fear I'm stuck without ideas at the moment.

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  • Weird "missing" CD/DVD driver during Windows Server 2008 installation

    - by Django Reinhardt
    Hi. We have an old PowerEdge 860 that we're trying to install Windows Server 2008 R2 onto. At present the machine doesn't have any OS installed, so we're doing a clean install from a DVD. Pretty simple stuff. The problem is that, although the installation process starts off well (asking for language and locale settings), as soon as we click "Install Now" we're told "A required CD/DVD device driver is missing." The operating system has already booted from our only DVD drive(!). I've seen other people complain about this problem (usually in relation to installing Vista or Windows 7) but I've not found a 100% solution yet. (Our DVD drive is a Hitachi LG GWA-4400N, salvaged from an old laptop. There have never been any drivers released for this device, nor any firmware updates.) The most promising lead I have is from someone claiming that Windows is actually asking for a driver for the ATAPI/IDE Controller here. UPDATE See my answer below... It was most likely a corrupt download. (*shame*) I will update this question when I know for sure.

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  • MacBook Pro 13" Install DVD Wont Start

    - by Belliez
    Hi, Excuse such a basic question... I am a Laptop Fixer and deal with Windows based laptops only but very recently took in a 13" MacBook Pro for a re-install of the OS (easy I thought!) I inserted the Install DVD, held the C button and turn on. I could hear the disk spinning up and after about a min the DVD is ejected. There are a few scratches on the DVD but should be ok as not that deep. However, Windows Vista was installed (it failed to install properly hence the re-install of Mac OS). Should I wipe clean and format the hard disk first? Could this be the reason the DVD is ejected? Any advice would be gratefully accepted? p.s. never held a MacBook Pro before... first impressions, wow... alu casing and massive touch pad... and the magnetic power socket.... so impressed and it doesn't even work!

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  • Remote NX login to Ubuntu, Gnome can't mount CD/DVD drive

    - by T.J. Crowder
    Even though I'm sitting next to it, I log into my Ubuntu 10.04 LTS system via NX Free Edition from another system at the moment (this is temporary, not worth buying a KVM for). Curiously, though, when I do that Gnome's auto-mounting fails for CD/DVD media (I haven't tried other kinds) with a "Not Authorized" error. For instance here's what happens when I put the Ubuntu 10.04 LTS installation CD in: This does not happen if I log into it locally (not via NX) with the same user account. When using NX, I can mount the media if I go to mount directly: tjc@midnight:~$ sudo mkdir /media/dvd tjc@midnight:~$ sudo mount -r -t iso9660 /dev/sr0 /media/dvd tjc@midnight:~$ ls /media/dvd autorun.inf casper dists install isolinux md5sum.txt pics pool preseed README.diskdefines ubuntu wubi.exe ...which, along with the "not authorized" error, suggests some kind of permissions problem to me (doh). What I find odd is that the same user is involved in both cases (local and via NX). I'm new to Ubuntu on the desktop (used it and other distros on servers for years), so I'm afraid I don't know how this auto-mounting is happening. I think it's handled by the gvfs package and its daemon, but that's about as far as I got (and perhaps I've taken a left turn even getting that far). Although I can work around it with mount, does anyone know how I might get auto-mounting to work?

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  • Unable to boot with Windows 2008 DVD / USB Key

    - by r0ca
    Hi everyone, I am trying to install Windows 2008 server on a HP Proliant DL180 G5. There is no built-in DVD reader so I need to use my LaCie USB one. When I put the CD in and boot from the USB DVD on the server, I get the error message: Boot Failed! Please insert boot media in selected boot device. So I tried with another Windows bootable CD and still no luck. What I've done then, I copied the installation DVD on my 16go USB key. Again, impossible to boot from the USB Key. I have 2 147go SAS 15k HDD on my server. They are not showing in the Bios. I was wondering if this is a reason why nothing will boot on it. I am trying to find a way to deploy Windows 2008 server on my HP server as soon as possible. If you guys have ideas, feel free to let me know :) Best regards, David. System Information: HP Proliant DL180 G5 Quad-Core 2.5 4GO Ram 2x 147GO SAS 15k P.S. This is my first installation ever on SAS/SCSI HDD. Thanks a bunch! Edit: Well, my bad! I purchased a new USB DVD and now I can install Windows 2008 server. Thanks a bunch for your help!

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  • Computer will not boot - disk read error - cannot boot from HD or DVD

    - by Grant Palin
    This is a 3 year-old system: HP a1640n. There have been no issues with it in the past. I added a video card 2 years ago, and more memory 1 year ago, both without issues. There haven't been any recent hardware changes. I did install Win7 in Oct., but there were no issues with that either. I used the computer fine two nights ago, and turned it off. Yesterday, I tried to turn it on, and got the error: "A Disk Read Error Occurred. Press CTRL ALT DEL to restart" So I restart, see the initial start screen (HP) and enter the BIOS. The hard drive and dvd drive appear to be listed, but the names are gibberish text. I tried putting a Windows disk in the dvd drive, and continued with the boot, but the disk did not get recognized. Even though the BIOS was set to check for optical media before the hard drive. Back to the error screen. If the computer would boot from a cd or dvd, I would just figure the hard drive needed replacing. But both being problematic worries me. Is this a matter of replacing both the hard drive and dvd drive, or might it be an indication of a bigger problem? Thanks for any advice.

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  • Unable to mount iso as dvd drive in VMware Fusion 6

    - by John O
    I have a newer iMac without an optical drive and some DVDs that I needed to run software off of. This software will have you juggle discs to read data off of them, and the data can't simply be copied to the machine's drive. I used a windows machine to make ISOs of these DVDs. And the first disc, the installer, it will mount in VMware and let you install the software. It then asks for the other discs, and these won't mount as ISOs. If I mount them as drive images, they'll show up on the iMac's and I have access to all the files. But if I try to mount them as the dvd drive through Fusion, nothing happens. For that matter, I'm unable to attempt it a second time, as Fusion believes that the there is already an iso mounted as the dvd, while nothing has happened as far as the guest OS is concerned. drutil eject will allow me to eject the ghost/non-existent dvd, at which point I can make a second (equally futile) attempt. Does anyone have an explanation for this behavior? How can the ISO be valid enough to mount as a drive image, but not valid enough for Fusion to mount it as if it were a dvd?

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  • Should you disable page file with SSD?

    - by Pyrolistical
    I've been reading http://serverfault.com/questions/23621/any-benefit-or-detriment-from-removing-a-pagefile-on-an-8gb-ram-machine, and it has a lot of great information. But assuming you have more than enough ram, I think page file should be disabled on SSD to extend the life time. I know you would lose the core dump on crash, but not many people need that information. From my understand without a page file as you reach the limit of your ram that might trigger thrashing on disk. But for SSDs there is no concept of thrashing, reads are fast. What do you guys think?

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  • Is there a cross-platform CD/DVD burning library or command-line app?

    - by Computer Linguist
    I'm looking for a cross-platform CD & DVD burning library. I'm not too particular about the language or framework a long as there are minimal dependencies and they are easily installable cross-platform, or already exist. A command-line application would also work.. Looking to target WinXP, Vista, Win7, OS X Leopard & Snow Leopard, & most linux distros. I know I can write an .iso cross platform, but I'm looking for a way to burn those .ISOs to disk on a variety of platforms without having to code seperately for each one. It's for burning MP3 disks and standard audio CDs... All suggestions appreciated.

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  • Slow Resume After suspend having chrome running with many tabs

    - by tUrGoNn
    I usually use chrome and Firefox for browsing. I also open many tabs (around 40 in both some times). The problem I have occurs when I resume the PC after having suspended it: It takes from 2 to 5 minutes sometimes to just get back normally. Does this have to do with memory usage not properly resuming? Is it a bug in Chrome/Firefox or Ubuntu itself? Note that I just upgraded from 10.10 to 11.10 and I was having the problem on both releases, which makes me guess that it has to do with Ubuntu not resuming well if some memory-heavy apps were running before the suspend occured.

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  • mongodb eating 48G in 1min

    - by ledy
    In mongodb i work with this collection: Size 55.93g Data Size 39.82g Storage Size 41.08g Extents 53 Indexes 4 Index Size 9.64g It takes few seconds of mongdb being up with this single collection and all 48GB RAM on the dedicated server are gone. That's worse because there is also a mysqld+nginx/fcgi on this machine which should be allowed to use at least 24GB together. I.e. remaining 24GB, enough for the mongod! However, it does not share in a fair way. Everybody says that the memory for mongod is managed by OS and releases unneccessary space for other processes if they demand RAM. On my machine it is not releasing RAM. What's wrong? free total used free shared buffers cached` Mem: 49559136 49403908 155228 0 57284 47247564 -/+ buffers/cache: 2099060 47460076 Swap: 8008392 164 8008228

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  • HP dv9000 Vista laptop won't boot from CD/DVD drive

    - by scottedwards2000
    My HP dv9000 Vista laptop recently got the BSOD with error 0x0000c1f5. The only way to fix this error is to be able to boot from CD/DVD and use some repair software I have. The problem is that the laptop REFUSES to boot from any CD/DVD I try. I've changed the boot order so the CD/DVD is first, and I can hear the drive spin up a bit upon power-up, but after a second, it spins down and then the laptop tries to boot from hard drive. Any ideas? (I've tried lots of CDs so it's not the media itself) Thanks much!

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  • Have a legitimate Windows 7 license and the Windows 7 key but don't have the DVD

    - by sonicboom
    I just booted up my 'old' PC that's been lying around for the last two years. I have Windows 7 on it and I'm looking to format the drive and do a fresh install of W7. I have the key for Windows 7 in a text file. However I don't have the Windows 7 DVD or image. So is there any way of burning off a Windows 7 DVD considering that its the operating system I'm currently using? If not...well I have a W7 key, will this key work with any W7 DVD or is it particular to the W7 image that came with the key?

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  • Windows 7 installation asks for DVD drivers

    - by koen
    I have installed Windows XP on my machine (Company CQ5020NL). Before I was able to do that, I set the SATA controller to IDE in the bios. Now I want to install Windows 7 upgrade. The DVD boots into the installation setup, but when I click "Install now" and am asked to load "A required CD/DVD drive device". When I click "Browse" I can browse the installation dvd and the drive I want to install to. I have tried all the SATA options in the bios already. I have no idea what to do... can anybody help me out?

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  • Fix Video timelines

    - by Josh
    So, I have been going through and riping all of my DVD's and it seems that the way to get the highest quality out of these is to have DVD Shrink de-encrypt, rip, and decompress, the DVD's. After that I usually end up with a high quality (high size) set of .vob files in a classic DVD structure. Then I use a python script that I wrote to automate the process of finding the title sequence and then combining all of the title sequences' .vob files together into one file(similar to the "copy /b" command in windows), and then changing the extension to .mpg (a more widely supported format then .vob). This allows me to get a high quality rip in about 40 min. The problem comes in playing the files. I need all of the ripped dvd's to play on my media computer using windows media center but windows media center (and vlc for that matter) all think that the video files are anywhere from 5 min. to 0 min. which is not a problem (the video will still play all the way through) but if you want to pause it, when it is unpaused the video will start all the way over (Also fast forward and rewind don't work). I suspect that it is something wrong with the way the timeline is encoded in the video file, various forums on the internet recommended using virtualdub to fix the errors. But when I try to open the file virtual dub says that the file is not in mpeg-1 encoding and may be in mpeg-2. Is there any way to fix this? PS: I am aware that there was a similar question but it hasn't had any activity for 2 months and is dealing more with wmv files.

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  • Utility to optimally distribute files onto multiple DVDs?

    - by Alex R
    I have a bunch of media files which I want to record to DVD, but since each DVD only fits 4.5GB, I have to find the optimal way to organize the files to use the minimum number of DVDs (otherwise the empty space left in each DVD can easily add up). Are there any tools to help with this? Many years ago there was a DOS utility to do this with floppy disks.

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  • CentOS ISO DVD self-disc-check failing

    - by Jakobud
    I downloaded a CentOS 5.4 DVD ISO from one of the official mirrors. The MD5 sum is correct for the iso file that was downloaded. I burned the ISO onto a DVD+R using ImgBurn. I got no errors during the burning process and it says it finished burning successfully. When booting a server using this DVD to install CentOS on it, the first thing I did was run the self-disc-check (where it checks the files to make sure its genuine, etc). It failed. Didn't really say why. Am I doing something wrong here? Or is there someplace I can see why its failing? If the MD5 is correct and I don't get any burning errors, how can it be failing its own self-check mechanism?

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  • HP dv9000 Vista laptop won't boot from CD/DVD drive

    - by ScottEdwards2000
    My HP dv9000 Vista laptop recently got the BSOD with error 0x0000c1f5. The only way to fix this error is to be able to boot from CD/DVD and use some repair software I have. The problem is that the laptop REFUSES to boot from any CD/DVD I try. I've changed the boot order so the CD/DVD is first, and I can hear the drive spin up a bit upon power-up, but after a second, it spins down and then the laptop tries to boot from hard drive. Any ideas? (I've tried lots of CDs so it's not the media itself) Thanks much!

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  • how to reinstall Asus notebook using Recovery DVD?

    - by Radek
    a friend of mine asked to reinstall his Asus notebook. He didn't want Vista anymore so I installed XP. Re-partitioned the hdd (no more recovery partition). Everything went fine except I cannot make LAN card work. I created a question for that. And I talked to Asus help desk but it didn't help so we decided to go back to Vista. I have the original Recovery DVD for his notebook. With files like ASUS.SWM and ASUS2.SWM. But I do not know how to use this DVD to reinstall his notebook. Did I mention that his DVD drive mostly doesn't work?

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  • How to burn a 8.5GB ISO?

    - by Vilx-
    I have an ISO image of a DVD which is 8.5GB in size. I find this strange, because that is about 500MB more than a standard DL DVD can hold. I tried overburning with Nero, but it failed. Is it possible to somehow burn such an image? Are there some special DVD blanks that allow you to write more? Or is this ISO simply made by some tool without any regards of whether it can be burned or not?

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  • Have optical drive connectors changed in the last year?

    - by Zippityboomba
    In early 2010 my motherboard freaked out, and I was able to drop in a new board and connect my two DVD drives that were initially bought in 2005. Tonight my new components arrived to build my next system, and I figured I'd just reuse the old DVD drives. Surprise, the long flat connector cable has no mate on the new motherboard. Reckon I'll just pick up a new DVD drive for $25, but what gives? Thanks!

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  • Driver proboems for SH-S203N Samsung DVD drive

    - by dircowander
    My father jsut bought me a dvd burner Samsung SH-S202N OEM and installed it into my computer. The drive seems to be able to burn media fine. But when it comes to reading dvd's, audio cd's, it just skips. It can read them it is just skipping so badly to the point where the dvd's are unwatchable and cd's skip rather bad. I am looking for the latest firmware or driver for the Samsung SH-S202N OEM. Any advice? Thanks in advance. :)

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