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• How do I access files inside a Wubi virtual ext4 Ubuntu partition from within Windows?

  - by aalaap

  I just installed Ubuntu 10.04 using Wubi on a PC that has Windows XP and Windows 7 installed. I was working in it for a while and everything is just fine. However, when I booted back into Windows 7, I couldn't figure out a way to access the files I had created or downloaded into the Ubuntu partition. They're in a virtual disk called root.disk in my C:\ubuntu\disks. Is there a way I can mount this vhd into Windows or at least browse the contents and extract what I need?

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• What do I need to know and how do I backup a recovery partition?

  - by PeanutsMonkey

  I am in the possession of a HP laptop specifically the HP Folio Ultrabook. I need to make an image of the harddrive so that in the event it needs to be restored I can do so with the base operating system which is Windows 7 Professional as well as the HP recovery partition. I also need to backup all data that is on the laptop. Where do I start? What software can I use? Please limit these to freely available software or Linux I need to be able to backup the image to a file server and an external harddrive Is there anything else I need to do or know? The laptop is being used by a user on a domain

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• Is it possible to use software raid in Windows 7 on the boot partition?

  - by DoctaJonez

  I want to use RAID 1 on my workstation configuration at work, and I've been looking at using the build in mirror functionality in Windows 7. When you click on the add mirror option it presents you with the following warning. I've done some Google searching and the consensus seems to be that you cannot boot from a dynamic volume, but some forum posts seem to indicate that people have tried this with success (e.g. here). With Google searches producing contradictory information I thought I'd ask you guys for an authoritative answer. Can I use the inbuilt Windows 7 mirroring for my boot partition? Or as I suspect, will it make it unbootable due to it being converted to a dynamic disk?

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• Good free way to clone a hard drive or a partition and send the image over the network (through FTP, Windows file sharing, "anything")?

  - by Deleted

  What I ideally would like is a free software solution which can: Boot from a CD/DVD/USB-stick and Clone a complete hard drive or a partition and Send the resulting image file over the network through Windows file sharing (SMB, I could use SAMBA on my server to receive the image) or through FTP or through SFTP or through SCP It should work with Linux and Windows file-systems (where specific file system support is necessary) Is there anything good out there like this? I know Wikipedia lists a lot of cloning software. But I'm looking for a personal recommendation which you have used yourself, as I find it more credible (I'll see from the upvotes if the answer is liked by a lot of visitors).

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• UNR Installation: Partitioning Error

  - by Wesley

  Hi all, I have a Samsung N120 netbook (with upgraded 2GB RAM). I'm trying to install Ubuntu Netbook Remix, but when I set my partitions, I get an error. The setup I want right now is: Recovery Partition - 6 GB Windows XP Home Partition - 40 GB General Partition - remaining space UNR Partition - 40 GB I am told that I need to resize a partition and it will take a while. However, when it nearly starts, I get an ERROR!!! dialog that says, "Error informing the kernel about modifications to partition /dev/sda5 - Device or resource busy. This means Linux won't know about any changes you made to /dev/sda5 so you shouldn't mount it or use it in any way before rebooting." I'm not too sure what I should do right now... any ideas? Thanks in advance.

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• Resize underlying partitions in mdadm RAID1

  - by kyork

  I have a home built NAS, and I need to slightly reconfigure some of my drive usage. I have an mdadm RAID1 composed of two 3TB drives. Each drive has one ext3 partition that uses the entire drive. I need to shrink the ext3 partition on both drives, and add a second 8GB or so ext3 partition to one, and swap partition of equal size to the other. I think I have the steps figured out, but wanted some confirmation. Resize the mdadm RAID resize2fs /dev/md0 [size] where size is a little larger than the currently used space on the drive Remove one of the drives from the RAID mdadm /dev/md0 --fail /dev/sda1 Resize the removed drive with parted Add the new partition to the drive with parted Restore the drive to the RAID mdadm -a /dev/md0 /dev/sda1 Repeat 2-5 for the other device Resize the RAID to use the full partition mdadm --grow /dev/md0 -z max Is there anything I've missed, or haven't considered?

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• partitioning problems

  - by Remus Rigo

  I had on my laptop a dual system (Ubuntu 11.04 and Windows 7) and someway the partitions messed-up. Windows stopped from booting, I just got a blinking cursor, but Ubuntu worked fine. I tried to fix the windows boot (fixmbr, fixboot, bootsect /nt60 C:/....) but now grub was overwritten and I have no OS. Finally I formatted the hdd (low format), installed Windows, partition hdd with paragon partition manager and now I want to install Ubuntu, but Ubuntu sees an empty hdd, weird, can anyone tell me what can I do? EDIT: I have created: partition 1: 100MB ntfs - windows reserved (drive B) partition 2: 50GB ntfs win 7 (drive C) partition 3: 50GB ext3 linux partition 4: 'the rest' ntfs for data (drive E) (the swap i will create after)

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• Windows 2008 R2: can't extend C drive, mystery partitions

  - by wfaulk

  I have a Windows 2008 R2 server running under VMware ESX 4.0.0. I have reallocated disk space to it in order to extend the C drive, but Disk Management has "Extend Volume" greyed out. DISKPART shows more partitions than Disk Management shows, including one after the volume I'm trying to extend, which would explain why Disk Management isn't allowing the extension. Disk Management shows: System Reserved / 100MB NTFS / Healthy (System) (C:) / 39.39 GB NTFS / Healthy (Boot, Page File, Crash Dump) 10.00 GB / Unallocated DISKPART shows: Partition 1 Dynamic Data 992 KB 31 KB Partition 2 Dynamic Data 100 MB 1024 KB Partition 3 Dynamic Data 39 GB 101 MB Partition 4 Dynamic Data 1024 KB 39 GB My question at this point is: what the heck are partitions 1 and 4, where did they come from, why doesn't Disk Management show them, and, most importantly, can I delete partition 4 in order to extend partition 3?

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• Prevent Win7 boot loader from taking over the WinXP boot loader

  - by Chris

  My setup: 1 physical hard drive (500gb divided equally into 2 partitions) Windows XP Partition (Current OS) Empty Partition where I will be installing Windows 7 My question is how do I prevent the Windows7 boot loader from taking over my WindowsXP boot loader when installing the new OS ? The reason I am asking is because I already have a ghosted backup of my WinXP partition and if I ever need to restore my xp partition using that backup, would it not overwrite the Windows7 boot loader that was placed in the XP partition with the one from the backup, thus making windows 7 unable to boot. Also what would happen if I decided to delete the Windows XP partition altogether somewhere down the road and along with it the Win7 boot loader that was placed there, wouldn't that cause the system not to boot at all.. To avoid these issues, I simply want to make sure that BOTH the Win7 and WinXP boot loaders are available on their respective partitions and they do not interfere with each other in any way. Is this possible? Thx, Chris

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• Network backup for Macs and PCs - formatting question

  - by neilfein

  I'm trying to use a LaCie 2TB drive as an AirPort drive, for backup on a home network. We have one mac and two PC laptops. My plan is to create a Mac partition and a Windows partition. However, Disk Utility won't let me set the windows partition to Windows format; there's no option in the menu for it in the partition tab. Am I doing something wrong? Alternatively, is there a way to partition the drive with one partition that all three machines can see? We have a Mac G5 with 10.4 and two laptops with Windows 7. Thanks!

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• My USB bootable thumb drive, no longer boots on a single particular computer on which it previously worked

  - by LiamMeron

  I created a bootable drive, booting CrunchBang, about 2 months ago. About a month ago, I booted into it on another laptop. After shutting down, I have been unable to get it to boot on my own laptop, despite having worked previously. I can still boot into it on my desktop, and can also boot into it on all other computers that I have tried. If I plug it in when I am running Ubuntu, the Home and / folders mount, the only error being that for some reason my PC likes to try and mount the swap partition too, which naturally, gives an error. The BIOS settings are all still setup to boot from USB. When I boot, all I get is a black screen with the white cursor, it will stay there for as long as I leave it. If it is worth anything, I have GRUB loader installed on the drive. The partitions look a little odd, but I am rather unfamiliar with how they are dealt with. The first partition, /, is sdb1 and has the bootable flag. The second partition is an extended system, and is sdb2. The third partition, according to GParted, seems to be nested under the second. This is the swap partition, and it is sdb5 The fourth partition is my home partition and is sdb6 and is also nested under the extended system. The first and fourth partitions are ext4. I don't know if that helps, but the more info, the better accuracy, generally. Thanks. EDIT: I tried reinstalling GRUB on the drive, but that didn't work. However, when I reinstalled GRUB on my laptop, I did it with my USB thumbdrive in. This caused the GRUB updater to find the /boot folder and add the proper details into my laptop's GRUB loader. I could log into CrunchBang from my laptop's GRUB but I was still unable to boot directly to the drive. It looked like my BIOS is unable to find the bootloader. I am unable to install GRUB to a partition I just created, a /boot partition at the start of the drive, GRUB just doesn't allow it. I think I'm going to have to reinstall #! on my drive, which won't be a great loss as I haven't put much time into it.

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• Trying to format drive fails

  - by david

  since I will be doing an internship for which i need to use Windows software, I have decided to ruin my day trying to remove my Ubuntu 12.04, install Win XP SP3 (since the DualBoot theme from ubuntu suggests to first install Windows and then Ubuntu, for problems with the bootloader if you do it the other way around) and then reinstall Ubuntu 12.04 since I would like to keep using it as my primary operating system, using WinXP exclusively for the internship. Other than that, I would like to have a partition for the data, which can be used by both Ubuntu and Windows. So now, I have used the disk utility run from an ubuntu-live cd to format my drive with Master Boot Record (being conscious of the fact that this way I will lose all my data, which I have saved on an external drive before, and that my Ubuntu won't work anymore afterwards), creating partitions for Windows (NTFS), personal data (FAT, since as far as I know both Ubuntu and Windows can deal with this), a Swap partition for Linux, and one partition for Ubuntu (ext4); trying to install Win XP from cd gives me a blue screen, which stops the setup and telling me to remove all recently installed drives and to run CHKDSK. So I thought, that maybe Windows doesn't like pre-partitioned drives for its installation and thus I need to re-format my hard drive in order to have a completely "new" drive, which I can then, during the Windows-installation, partition in order to create the partitions I need. Trying to do this, though, the disk-utility run from the live-CD gives me this warning: Error creating partition table: helper exited with exit code 1: In part_create_partition_table: device_file=/dev/sda, scheme=0 got it got disk committed to disk BLKRRPART ioctl failed for /dev/sda: Device or resource busy I do not understand why it tells me that the hard-drive is busy, because, as stated above, I am doing all this from a live-CD. Thus, my questions are: How can I resolve the error given by the disk utility? Does it make sense to use four partitions in the way mentioned above? And if not so, which partitions should I create? Can I, theoretically, partition my drive from an Ubuntu live-cd in order to create the partitions I want and to install first Windows and then Ubuntu? Thanks for any help, David

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• Won't boot after installing Ubuntu 12.04 sucessfully

  - by Matt

  I installed 12.04 successfully and rebooted (I took out my installation CD), and selected the newly installed Linux partition to boot from rEFIt. Then it just comes up with this error message: Error loading operating system which could not be more vague. Take that back. I guess it could say just "error." I don't even get to the boot prompt which limits what I can do. I cannot boot into rescue mode. I tried boot-repair, but it took more than 24 hours to check the system configuration, so I gave up on that. I'm running a Mac Mini with its main OS being Mac OS X 10.5.8. I have an alternate OS Windows XP installed, which was virtually destroyed by this Linux installation. I sacrificed my working, speedy Windows partition for something that won't even boot up. What was I thinking. My Mac partition is slow as crap. I've tried installing 12.04 many times with two different disks. The first time, I had one partition for Linux, then I had 2 (swap+main), then 3 (swap, main and BIOS), then 4 which is what I have now (swap, main, BIOS, and boot/grub). The only way I could get through the install without GRUB giving up was if I created a separate partition for it. Which was pointless, because it did install successfully, but it still doesn't boot up at all. Could rEFIt be booting off of the BIOS or one of the other partitions? Because if that's the case, there is no alternative, because Mac itself without rEFIt refuses to recognize a Linux ext4 (or 2 or 3) format partition. Apple always has to make everything so difficult. If I'm not mistaken, rEFIt is the only application of its kind for Mac. I can boot off of the CD back to the install/try screen. This is extremely upsetting, can you guys help? Please?

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• Mounting an encrypted partion Error

  - by indiajoe

  Using the disk utilities in ubuntu 11.04, i had encrypted a partition with a passphrase. Each time i used to click on the partition to mount, it used to ask me the passphrase and get mounted. All was fine, until i installed the 12.04. After the installation, this encrypted partition, disappeared from the menu. fdisk -l /dev/sda Shows the encrypted partition in the list /dev/sda7 298953648 488392064 94719208+ 7 HPFS/NTFS/exFAT I tried the following commands to mount it. But they all gave following errors $ sudo cryptsetup luksDump /dev/sda7 Device /dev/sda7 is not a valid LUKS device. $ ecryptfs-unwrap-passphrase /dev/sda7 Passphrase: # i entered the correct passphrase here... Error: Unwrapping passphrase failed [-5] Info: Check the system log for more information from libecryptfs $ grep ecryptfs /var/log/syslog Oct 31 22:43:51 benny ecryptfs-unwrap-passphrase: Error attempting to open [/dev/sda7] for reading Nov 1 01:28:02 benny ecryptfs-unwrap-passphrase: Error attempting to open [/dev/sda7] for reading Nov 1 01:29:06 benny ecryptfs-unwrap-passphrase: Error attempting to open [/dev/sda7] for reading I don't understand why I am getting the "Device /dev/sda7 is not a valid LUKS device." Could it be due to some corruption in partition table? Is there any way to recover this encrypted partition? Thanks indiajoe

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• How can I make an unmounted / unmountable NTFS disk not show up in the nautilus devices area?

  - by Dennis

  I have an idea that my /etc/fstab is a real mish-mash and I don't remember how it got that way, first of all it looks like this UUID=9EB80807B807DD21 /media/Storage ntfs-3g users 0 0 UUID=a60397fd-964a-45b1-ad35-53c8a4bee010 / ext4 defaults 0 1 UUID=1764825d-b8ba-4620-b3b0-e979b6f4f5c4 swap swap sw 0 0 UUID=255DA1E406E29DBC /media/sda2 ntfs-3g defaults 0 0 UUID=2CCCF161CCF1262C /mnt/sda1 ntfs-3g umask=000 0 0 /dev/fd0 /media/floppy0 vfat noauto 0 0 I started with an old XP install on disk /dev/sda that I don't use anymore but didn't want to delete, so I shrunk the XP partition, added a NTFS partition that would be common to both systems (Labeled it "Common" in XP), then installed Lucid on an extended ext4 partition. On this disk of course the ext4 system partition comes up as /, the go between partition auto-mounts on /media/sda1 but shows up in Nautilus as COMMOM, while the XP system disk does not show up in Nautilus, but I can get to it by navigating to /mnt/sda1. A second hard drive (/dev/sdb) that I stuck in was already formatted NTFS with a bunch of stuff and labeled "Storage". It auto-mounts to /media/Storage but another un-mounted disk also shows up in the Nautilus device area called Storage but it can't be mounted (Here and in the "Places" are the only times it appears) I would primarily like this non-existant (or already mounted depending on how you look at it) disk to not show up, but I wouldn't mind an explanation of why one labeled partition auto-mounts to a /media mount point but shows up by label, one does not show up as mounted at all but mounts to a /mnt mount point and is there for navigation, and one is mounted to a directory of the same name as the label. I would love to have some consistancy / direction on what is proper in this circumstance. No doubt I caused this with the fstab but I really don't remember what my rational was if I edited it manually

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• How to install Ubuntu 12.04.1 in EFI mode with Encrypted LVM?

  - by g0lem

  I'm trying to properly install Ubuntu 12.04.1 LTS 64-bit PC (AMD64) with the alternate install CD ".iso" on a lenovo Thinkpad X220. Default Hard Disk (with a pre-installed version of Windows 7) has been replaced with a brand new SSD. The UEFI BIOS of the lenovo Thinkpad X220 is set to "UEFI Boot only" & "USB UEFI BIOS Support" is enabled (I'm using an external USB DVD reader to perform Ubuntu installation). The BIOS is a Phoenix SecureCore Tiano, BIOS version is 8DET56WW (1.26). The attempts below are made with the UEFI BIOS settings described above. Here's what I've tried so far: Boot on a live GParted CD Create a GPT partition table Create a FAT32 partition for UEFI System, set the partition to "EF00" type ("boot" flag) Leave remaining space unformated Boot on Ubuntu 12.04.1 LTS 64-bit PC (AMD64) with alternate CD: Perform the install with network updates enabled Use manual partitioning FAT32 partition created with GParted is used as "EFI System partition" Remaining space is set to be used as "Physical volume for LVM" Then "Configure encrypted volumes" using the previous "Physical volume for LVM" as the encrypted container, passphrase is setup. "Configure the Logical Volume Manager" creating a volume Group using the encrypted container /dev/mapper/sda2_crypt Creation of the Logical Volumes "Create logical volume", choosing the previously created volume Group Assign a mount point and file system to the Logical volumes : LV-root for / LV-var for /var LV-usr for /usr LV-usr-local for /usr/local LV-swap for swap LV-home for /home NOTE: /tmp would be in RAM only using TMPFS Bootloader step: neither my ESP partition (/dev/sda1, /dev/sda or MBR) seems to be the right place for GRUB, I get the following message (X suffix is for demonstration only): unable to install grub in /dev/sdaX Executing 'grub-install /dev/sdaX' failed This is a fatal error. Finish installation without the Bootloader & Reboot The system doesn't start, there's no EFI/GRUB menu at startup. What are the steps to perform a clean and working installation of Ubuntu 12.04.1 Precise Pangolin, 64bit version in U(EFI) mode using the encrypted LUKS + LVM scheme described above?

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• What Does Installing Ubuntu "Alongside" Windows Entail?

  - by Soft Skeleton

  I recently posted a question about an error I was receiving trying to access Ubuntu from the boot menu. I am using Windows 7 and Ubuntu 12.x (I THINK because I haven't accessed it in over a year due to being unable to run an important program for one of my classes on Ubuntu). On another laptop, I partitioned the hard drive and installed Windows and Ubuntu on the partitions. On this laptop, I simply installed Ubuntu from Windows, picking the option "alongside Windows", and didn't partition my hard drive manually. I was under the impression "alongside" entailed that Ubuntu would partition my hard drive, and that if I were to return my Windows partition to factory settings it would not affect the Ubuntu partition. However, given my current problem, I am wondering if I was mistaken in this assumption? When installing Ubuntu from Windows, selecting "alongside" Windows as the option from the Ubuntu installer, does that simply install Ubuntu within the Windows partition and thus returning it to factory settings would wipe out anything I had on the Ubuntu OS as well? Ubuntu is still in the boot menu as an option, but when I try to access it it says the drive is "corrupt" and wubi is mentioned in the error. I additionally tried to download a program ran from Windows to investigate partitions and there were no sign of my Ubuntu partition viewable from Windows. Is it possible Windows just can't see it? Any insight, corrections or answers is appreciated.

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• Dual Boot menu with Ubuntu and Windows 8 not showing up

  - by user180630

  I know a lot of posts have been written, and I had read most of them when I encountered the problem. None of them solved the problem. I have successfully installed Ubuntu 12.04 on top of Windows 8. Now my PC simply boots into Windows 8. If I press 'Esc' at start of BIOS, and then F9,the GRUB shows up and Ubuntu is listed at the top of the several options to boot from. I did run Boot-Repair once I logged into Ubuntu explicitly from GRUB as mentioned above. I did all said by Stormvirux in this link but was still unsuccessful. The debug info is listed here. Something which confuses me is the message which Boot-Repair stated after it did its job. You can now reboot your computer. Please do not forget to make your BIOS boot on sda (8004MB) disk! The boot files of [The OS now in use - Ubuntu 12.04.2 LTS] are far from the start of the disk. Your BIOS may not detect them. You may want to retry after creating a /boot partition (EXT4, 200MB, start of the disk). This can be performed via tools such as gParted. Then select this partition via the [Separate /boot partition:] option of [Boot Repair]. (https://help.ubuntu.com/community/BootPartition) I don't know why it says it is far from the start of the disk as I see it first in the GRUB menu which comes up at startup. One more input, when I try to place the GRUB in sda, Boot-Repair does not progress giving me the following error: GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate /boot/efi partition:] option. I had to select Separate /boot/efi partition: sdb2

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• Help with dual booting Windows 8.1 Professional and Ubuntu 13.10

  - by user1292548

  I recently installed a clean version of Windows 8.1 Professional on my Lenovo Y500 (with Samsung 256GB 840 Pro SSD). I have Windows all set up and running normally. I am trying to dual boot Windows 8.1 and Ubuntu 13.10, but the installation procedure don't allow me to either "Install alongside..." or shows my SSD partitions correctly when I chose the "Something Else" option. I have created a 25GB partition of free space in the Windows disk manager, but on the installation screen on Ubuntu, it shows the whole drive as a free space. I have tried installing with a burned .ISO disk and a bootable USB, the results are the same for both. Windows Disk Management screen: http://imageshack.us/a/img855/9504/59zu.jpg The Ubuntu installation screen: http://imageshack.us/a/img62/2712/9g6i.jpg I've ran into this problem before when trying to dual boot Ubuntu and Windows 7 Professional a month ago. But I gave up and never resolved the issue. --EDIT-- I tried what Eero Aaltonen suggested, and this is my result: ubuntu@ubuntu:~$ sudo parted /dev/sda print Warning: /dev/sda contains GPT signatures, indicating that it has a GPT table. However, it does not have a valid fake msdos partition table, as it should. Perhaps it was corrupted -- possibly by a program that doesn't understand GPT partition tables. Or perhaps you deleted the GPT table, and are now using an msdos partition table. Is this a GPT partition table? Yes/No? yes Model: ATA Samsung SSD 840 (scsi) Disk /dev/sda: 256GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags ubuntu@ubuntu:~$

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• Ubuntu 12.04 - syslog showing "SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled"

  - by Tom G

  I have been seeing these random logs in syslog on our production system. There is no XFS setup. Fstab only shows local partitions, only EXT3 . There is nothing in crontabs either. The only file system related package I have installed is 'nfs-kernel-server' Kernel version is 3.2.0-31-generic . kernel: [601730.795990] SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled kernel: [601730.798710] SGI XFS Quota Management subsystem kernel: [601730.828493] JFS: nTxBlock = 8192, nTxLock = 65536 kernel: [601730.897024] NTFS driver 2.1.30 [Flags: R/O MODULE]. kernel: [601730.964412] QNX4 filesystem 0.2.3 registered. kernel: [601731.035679] Btrfs loaded os-prober: debug: running /usr/lib/os-probes/mounted/10freedos on mounted /dev/vda1 10freedos: debug: /dev/vda1 is not a FAT partition: exiting os-prober: debug: running /usr/lib/os-probes/mounted/10qnx on mounted /dev/vda1 10qnx: debug: /dev/vda1 is not a QNX4 partition: exiting os-prober: debug: running /usr/lib/os-probes/mounted/20macosx on mounted /dev/vda1 macosx-prober: debug: /dev/vda1 is not an HFS+ partition: exiting os-prober: debug: running /usr/lib/os-probes/mounted/20microsoft on mounted /dev/vda1 20microsoft: debug: /dev/vda1 is not a MS partition: exiting os-prober: debug: running /usr/lib/os-probes/mounted/30utility on mounted /dev/vda1 30utility: debug: /dev/vda1 is not a FAT partition: exiting os-prober: debug: running /usr/lib/os-probes/mounted/40lsb on mounted /dev/vda1 debug: running /usr/lib/os-probes/mounted/70hurd on mounted /dev/vda1 debug: running /usr/lib/os-probes/mounted/80minix on mounted /dev/vda1 debug: running /usr/lib/os-probes/mounted/83haiku on mounted /dev/vda1 83haiku: debug: /dev/vda1 is not a BeFS partition: exiting os-prober: debug: running /usr/lib/os-probes/mounted/90bsd-distro on mounted /dev/vda1 83haikuos-prober: debug: running /usr/lib/os-probes/mounted/90linux-distro on mounted /dev/vda1 os-prober: debug: running /usr/lib/os-probes/mounted/90solaris on mounted /dev/vda1 os-prober: debug: /dev/vda2: is active swap Why would this randomly show up? This also spawns multiple "jfsCommit" processes.

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• Impact of Server Failure on Coherence Request Processing

  - by jpurdy

  Requests against a given cache server may be temporarily blocked for several seconds following the failure of other cluster members. This may cause issues for applications that can not tolerate multi-second response times even during failover processing (ignoring for the moment that in practice there are a variety of issues that make such absolute guarantees challenging even when there are no server failures). In general, Coherence is designed around the principle that failures in one member should not affect the rest of the cluster if at all possible. However, it's obvious that if that failed member was managing a piece of state that another member depends on, the second member will need to wait until a new member assumes responsibility for managing that state. This transfer of responsibility is (as of Coherence 3.7) performed by the primary service thread for each cache service. The finest possible granularity for transferring responsibility is a single partition. So the question becomes how to minimize the time spent processing each partition. Here are some optimizations that may reduce this period: Reduce the size of each partition (by increasing the partition count) Increase the number of JVMs across the cluster (increasing the total number of primary service threads) Increase the number of CPUs across the cluster (making sure that each JVM has a CPU core when needed) Re-evaluate the set of configured indexes (as these will need to be rebuilt when a partition moves) Make sure that the backing map is as fast as possible (in most cases this means running on-heap) Make sure that the cluster is running on hardware with fast CPU cores (since the partition processing is single-threaded) As always, proper testing is required to make sure that configuration changes have the desired effect (and also to quantify that effect).

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• Windows Recovery from Grub messed up my computer?

  - by Hudson Worden

  Ok so I'm a noob when it comes to Operating Systems and I think I really messed up this time. So I have a laptop that dual boots Windows 7 and Linux Mint 11. I was trying to boot into Windows 7 but it would just have a black screen with a blinking cursor. So I turned off my computer and tried again. Still a black screen with a cursor. So I thought "well it must be broken somehow and I remembered seeing something like 'Windows Recovery' from the boot menu so I should try it." So when I turned on my computer a third time I selected 'Windows Recovery' (Something like that I can't remember exactly what it was called). After I had selected that I got a white Windows window that said in big red letters "ERROR". I turned off my computer again a turned it back on expecting the Grub menu to reappear. I was wrong. Instead I am greeted with error: no such partition grub rescue. Then I put in a live CD for ubuntu 11.04 and tried looking at my partitions using the disk manager. Looking at my partitions I notice that there isn't a Linux partition anymore and in its place is a unallocated space partition yet the Linux Swap partition is still there. My windows partition is still fine and I can access the files in it. If you understand what has happened, is there anyway I can get my files back? I don't care about reinstalling the OS again. I just want those files that are in the Linux Mint partition.

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• Reason why Windows can't be installed on Ubuntu , Any Help though?

  - by Terzuz

  Well I got my Windows Vista .iso file , I put it on my USB Drive , Extracted , Then I restarted and went to "Boot Device Options" Clicked "Generic USB" (What I labeled when I formatted) Then it stood on a black screen for 15 minutes , Then just went to Ubuntu , Now I found out exactly what happened Why Windows WONT work on Ubuntu is a simple reason Not if you save it in NFTS Format or MSDOS (Both Windows Formats) , Not if you use anything special , This even applies to the Ubuntu downloader , One specific reason that I just noticed , Since WINE (Windows Application Loader) can't run while you click the USB , You can't open the Setup.exe file needed to install the Operating System , That means you can not install it at all if it is a .exe installer file , Then what can we do? Only other way is to make a partition with GParted , Put a partition , then install WINE , Then run your Windows Setup.exe file , Then Wine will load it up! Why not to open Setup.exe before you make a partition - Simple , It WONT WORK! I have tried , It says you need __ Amount of space and can be put on any partition , Yeah , Any partition NOT BEING USED Here is where I need your help! - I want to make a partition but they all show as locked when I open GParted , So How am I supposed to open them up? Get a hammer and tell HP my laptop didn't want to open its partitions? Nope , I need some help on how to unlock the partitions or what to do , Thank you in advance PS- If I could , I would put a bounty to this but I do not have enough reputation!

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• Grub2 cannot detect Windows 8

  - by MetaChrome

  At installation it did not detect Windows. I mounted the Windows partition and have run os-prober with no results returning. I am able to boot Windows or Ubuntu by specifying the partition in UEFI boot order. The bios does not appear to allow booting with legacy. SecureBoot is on. This is with Ubuntu 12.04 LTS on a Inspiron 15. Here is the gdisk: 1 2048 1026047 500.0 MiB EF00 EFI system partition 2 1026048 1107967 40.0 MiB FFFF Basic data partition 3 1107968 1370111 128.0 MiB 0C01 Microsoft reserved part 4 1370112 2394111 500.0 MiB 2700 Basic data partition 5 2394112 544743423 258.6 GiB 0700 Basic data partition 6 606183424 625140399 9.0 GiB 2700 Microsoft recovery part 7 544743424 545230847 238.0 MiB 0700 (/boot) 8 545230848 556949503 5.6 GiB 8200 (swap) 9 556949504 606181375 23.5 GiB 0700 (/) When installing ubuntu, I believe I specified that the bootloader be installed on /dev/sda. I added the following to /etc/grub.d/40_custom but booting ubuntu did not offer a grub menu: menuentry "Windows 8" { set root = "(hd0,4)" chainloader +1 } When booting I think I see "EFI Disk error" flash very quickly before Ubuntu starts booting.

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• how to recover lost partitions data

  - by TheJoester

  I have a 2TB SATA drive that was being used as file storage on my UBUNTU computer. I was re-imaging my windows box so I used that drive to back up some files to it. I did this by taking the drive from my windows PC and putting it in my UBUNTU PC, mounted it and copied the files over. After the windows refresh I thought it would be easier to take the 2 TB drive and dock it in the external dock my Windows case has built in. Anyway it would recognize in BIOS but windows would not see it (because it was EXT3 or EXT4) so when I went into the disk manager it advised me the drive needed to be initialized. Me not thinking I initialized it as a GUID Partition table. Now it sees it as a blank drive, even in UBUNTU. I have done nothing else to write or change the drive. I was wondering if there is a qay to repair the old partitioning and get access to my files back? many thanks! EDIT: I followed the instructions in the link @kniwor sent me. I used the command sudo gpart -W /dev/sda /dev/sda and here was the result: Guessed primary partition table: Primary partition(1) type: 007(0x07)(OS/2 HPFS, NTFS, QNX or Advanced UNIX) size: 0mb #s(1) s(2861671176-2861671176) chs: (1023/254/63)-(1023/254/63)d (178130/202/1)-(178130/202/1)r Primary partition(2) type: 007(0x07)(OS/2 HPFS, NTFS, QNX or Advanced UNIX) size: 0mb #s(1) s(3484550160-3484550160) chs: (1023/254/63)-(1023/254/63)d (216903/55/1)-(216903/55/1)r Primary partition(3) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Primary partition(4) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Not sure it found what I wanted. suggestions?

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