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• Having problems booting xubuntu after installation

  - by lagaffenewbe

  I'm newbie with ubuntu, I tried to install ubuntu, at the beginning xubuntu work for the first upgrade to xubuntu 12.04, but after the reboot, no winxp media center ether Xubuntu won't start and I have a screen Ctrl+Alt+Del nothing else. I read a little about, maybe the sata enabled on the bios. What is the problem and can it be fixed or do I have to remove xubuntu. Partition is : 100gb xubuntu 220gb winxp I have an external drive 1 tb Thanks for the help.

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• How do I re-install Unity after uninstalling gnome-shell?

  - by Florian

  I am using Ubuntu 14.04. I have big issues with the Unity desktop. I installed then uninstalled gnome-shell (using "apt-get autoremove --purge gnome-shell"). Since then, my desktop has no background and no icons. Plus, and this is the bothering part, unity is very unstable. On startup, there is a huge use of memory, much more than before. Sometimes, I also cannot minimize a window without having the desktop freezing and having to kill the process in question with tty1. I have tried to use : apt-get autoremove --purge ubuntu-desktop apt-get install ubuntu-desktop But it does not change a thing. I tried to update my video drivers but it is still the same. How can I reinstall the unity desktop thoroughly (obviously, something in its install is broken) ? If it is not possible, is it safe that I create a new partition on my disk where I will put my files and reinstall Ubuntu on the old partition (I do have a USB install of Ubuntu 14.04 but not enough space to save my files on it) ?

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• ASUS X401A ubuntu installation

  - by fabian

  I tried to install ubuntu in my laptop ASUSX401A. I removed windows in the partition tablea at the installation. All ok up to here, however when I reboot the HD after finish the installation, the HD was not recognized, in the bios not appeared the HD the only option was the realtek card, then was impossible to enter to ubuntu. After that I tried again to install ubuntu but now I have a error in the input/output when I wanted the enter the table partion. I appreciate any help Fabian

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• Remove partition for failed installation

  - by kapitanluffy

  i tried installing ubuntu alongside windows 7 Installing Ubuntu alongside Windows and i failed so i decided to go with wubi again. after installing it, i noticed a separate hard disk. i investigated and found out that this hard disk is actually for the failed installation. i don't know where to find it inside the windows system. can anyone please teach me how to remove the 'failed' hard disk. here's a screenshot the left side is the current filesystem. the right side on the other hand is the 'failed' harddisk. i verified that it is the failed one because the wubi installation will provide a 'host' folder for the current partition it is currently installed. i tried looking for the 'failed' one using the windows' commandline but i don't know where to look for the 'failed' disk. (i used the cmd coz i don't want root.disk to mysteriously disappear again.) see http://ubuntu-with-wubi.blogspot.com/2011/01/mystery-of-disappearing-rootdisk.html

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• Can't shrink Windows Boot NTFS disk: ERROR(5): Could not map attribute 0x80 in inode, Input/output error

  - by arcyqwerty

  Ubuntu 12.04 LTS, all updates current as of 7/3/2012 gksudo gparted Shrink /dev/sda2 from 367GB to 307GB GParted 0.11.0 --enable-libparted-dmraid Libparted 2.3 Shrink /dev/sda2 from 367.00 GiB to 307.00 GiB 00:32:57 ( ERROR ) calibrate /dev/sda2 00:00:00 ( SUCCESS ) path: /dev/sda2 start: 20,484,096 end: 790,142,975 size: 769,658,880 (367.00 GiB) check file system on /dev/sda2 for errors and (if possible) fix them 00:00:53 ( SUCCESS ) ntfsresize -P -i -f -v /dev/sda2 ntfsresize v2012.1.15AR.1 (libntfs-3g) Device name : /dev/sda2 NTFS volume version: 3.1 Cluster size : 4096 bytes Current volume size: 394065338880 bytes (394066 MB) Current device size: 394065346560 bytes (394066 MB) Checking for bad sectors ... Checking filesystem consistency ... Accounting clusters ... Space in use : 327950 MB (83.2%) Collecting resizing constraints ... Estimating smallest shrunken size supported ... File feature Last used at By inode $MFT : 389998 MB 0 Multi-Record : 394061 MB 386464 $MFTMirr : 314823 MB 1 Compressed : 394064 MB 1019521 Sparse : 330887 MB 752454 Ordinary : 393297 MB 706060 You might resize at 327949758464 bytes or 327950 MB (freeing 66116 MB). Please make a test run using both the -n and -s options before real resizing! shrink file system 00:32:04 ( ERROR ) run simulation 00:32:04 ( ERROR ) ntfsresize -P --force --force /dev/sda2 -s 329640837119 --no-action ntfsresize v2012.1.15AR.1 (libntfs-3g) Device name : /dev/sda2 NTFS volume version: 3.1 Cluster size : 4096 bytes Current volume size: 394065338880 bytes (394066 MB) Current device size: 394065346560 bytes (394066 MB) New volume size : 329640829440 bytes (329641 MB) Checking filesystem consistency ... Accounting clusters ... Space in use : 327950 MB (83.2%) Collecting resizing constraints ... Needed relocations : 13300525 (54479 MB) Schedule chkdsk for NTFS consistency check at Windows boot time ... Resetting $LogFile ... (this might take a while) Relocating needed data ... Updating $BadClust file ... Updating $Bitmap file ... ERROR(5): Could not map attribute 0x80 in inode 1667593: Input/output error ======================================== Windows has run chkdsk successfully (on boot) several times now

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• Freeing disk space on Ubuntu to use in Windows

  - by Alex

  I have 250Gb drive on a laptop, which has Windows 7 on a 122Gb ntfs partition (which has a "boot" flag on it) and Ubuntu 12.04.1 on a 110Gb extended partition, of which the root ext4 partition is 108Gb and the swap is 1.74Gb. You can see everything in the screenshot below. My question is: I want to diminish the size of the linux root partition and then use that space to increase the windows partition. How do I do that? Also, is it possible to increase the size of the swap partition and not do any damage? If so, how? I'm using GParted, and i'd say i'm pretty confident with it. Screenshot of my partitions

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• Gparted Partition Mount Points Alternate Between 2 Physical Disk Drives

  - by California Ken

  I'm running Ubuntu Server 14.04 on a system with 2 physical disk drives. I am frequently seeing mount errors on startup. When I check the drive partitions using GPARTED, I see that my two "non-system created" data partitions have the wrong disk assignments (i.e. sda1 vs sdb1) or visa-versa. If I hand edit /etc/fstab to match GPARTED, the system will boot error free one time. On the second restart I will get the "serious mount problem" error for the 2 data partitions and when I check GPARTED, the disk assignments have changed again (again, GPARTED and fstab don't match). A listing of my /etc/fstab is: /etc/fstab: static file system information. # Use 'blkid' to print the universally unique identifier for a device; this may be used with UUID= as a more robust way to name devices that works even if disks are added and removed. See fstab(5). # / was on /dev/sdb2 during installation UUID=766a06a4-e5af-484a-adf0-fa1e88da7212 / ext4 errors=remount-ro,user_xattr,acl,barrier=1 0 1 swap was on /dev/sda6 during installation UUID=8c42f835-ead3-43fb-88d8-196f5dfc3aa7 none swap sw 0 0 swap was on /dev/sdb3 during installation UUID=2214deec-ba98-47da-aea7-4e46998f3e57 none swap sw 0 0 /dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0 /dev/sda1 /media/ken/Linux-Data ext3 defaults 0 2 /dev/sda5 /media/ken/Data2 ext4 defaults 0 2 The device designations in the last 2 lines are the ones in question. The fstab entries to NOT change between system restarts but the mount points in the GPARTED display do. Does anyone have a fix for this? Thanks Mr. Young and Mr Gedak, Following is my fstab file and two blkid outputs. The fstab output is correct. The first blkid output was after a reboot and is WRONG! The sda and sdb device partition data is reversed. The 2nd blkid output was after a second reboot (fstab not changed). It shows the sda and adb partition data CORRECTLY. I didn't see any duplicate UUIDs. Does anyone have any idea why the GPARTED and blkid outputs alternate on consecutive reboots? The alternating partition data is real since when the partition assignments are reversed, the boot sequence halts with disk mounting errers (I have to press "s" to skip the mounts). Thanks again. Ken I copied the contents of a text file showing my fstab and 2 blkid outputs. The text file contents show up in the text entry box but does not appear in the main body of the question. Is there a way I can attach the text file or edit this question so that the text is displayed for question viewers?

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• I want files in fat32 partition to be shown in My personal folder

  - by fat32

  I have a 25gig partition in ext4 for ubuntu, an NTFS 25gig partition for W7,a logical swap of 2gig, and then a logical 60 gig partition in fat32 which i've read is the correct file system for files as music, pics, videos i want to share with Windows. The problem is that those files are not "asociated" or shown in My personal folder, and it would be great to. I hope I get your answers asap. Thanks

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• Fix corrupt NTFS partition without Windows

  - by Capt.Nemo

  MY NTFS Partition has gotten corrupt somehow (it's a relic from the days when I had Windows installed). I'm putting the debug output of fdisk and blkid here. At the same time, any OS is unable to mount my root partition, which is located next to my NTFS partition. I'm not sure if this has anything to do with it, though. I get the following error while trying to mount my root partition (sda5) mount: wrong fs type, bad option, bad superblock on /dev/sda5, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so ubuntu@ubuntu:~$ dmesg | tail [ 1019.726530] Descriptor sense data with sense descriptors (in hex): [ 1019.726533] 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 [ 1019.726551] 1a 3e ed 92 [ 1019.726558] sd 0:0:0:0: [sda] Add. Sense: Unrecovered read error - auto reallocate failed [ 1019.726568] sd 0:0:0:0: [sda] CDB: Read(10): 28 00 1a 3e ed 40 00 01 00 00 [ 1019.726584] end_request: I/O error, dev sda, sector 440331666 [ 1019.726602] JBD: Failed to read block at offset 462 [ 1019.726609] ata1: EH complete [ 1019.726612] JBD: recovery failed [ 1019.726617] EXT4-fs (sda5): error loading journal When I open gparted (using live CD), I get an exclamation next to my NTFS drive which states Is there a way to run chkdsk without using windows ? My attempt to run fsck results in the following : ubuntu@ubuntu:~$ sudo fsck /dev/sda fsck from util-linux-ng 2.17.2 e2fsck 1.41.14 (22-Dec-2010) fsck.ext2: Superblock invalid, trying backup blocks... fsck.ext2: Bad magic number in super-block while trying to open /dev/sda The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> Update : I was able to fix the NTFS partition running chkdsk off HBCD, but it seems that the superblock problem still remains. *Update 2: * Fixed superblock issue using e2fsck -c /dev/sda5

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• Ubuntu 11.10 running in windows 7 (wubi) AND on a separate partition

  - by Pareen

  I am in a very strange situation and need some help: I installed Ubuntu 11.10 through Wubi a while back so that I can use it alongside Windows 7. I was running out of space on my disk when trying to install applications. Without understanding how Wubi worked, I partitioned my C drive (creating a new 90 GB partition) in Windows, booted from the Ubuntu 11.10 install/live disk, and used the "something else" option to create a ext4 (setting the mount point to root) and swap space partitions (/sda5 and /sda6). After the install, my computer no longer boots with the previous Wubi menu and is now using the Linux grub. The options I have are /sda2, which boots Windows 7; /sda1, which doesn't do anything and reloads the same menu, and the run Linux options. So I now have Ubuntu running on a separate partition, as well as the original Wubi install. I want to delete the seperate partition and go back to running Ubuntu on Wubi...if I remove the partition will I need the Windows 7 disk to restore the boot loader? I dont have the Windows 7 disk on me so what is the best way to clean this up so I get rid of the seperate partition? -------------------------------------------------UPDATE----------------------------------------------------- ============================================================================================================ thank you so much for your response. Actually, it would be fantastic if I could migrate my Wubi install into the new partition because I had downloaded the AOSP on the Wubi install (as well as other files) and would love to preserve them. If i can do that and work on the new partition with the old files than that would be great, and I can worry about wiping out the partition completely later on i.e. when I have the windows disk or something. Can you tell me how to do this migration?? So when I select the /sda2, it loads up my Windows. If i click on the Linux, it loads up the newly install Linux (my files that were on the Wubi install aren't there) fine. If I click on the /sda1 (SYSTEM_DRIVE... this is what the Wubi was using to boot the menu that let me select Windows 7 or Ubuntu)... it fails and just reloads the original menu. Here is the link to my boot info script http://pastebin.com/dMrY0NL3

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• Installing on a mac without a CD burner or USB boot

  - by Rafael

  I am new to Ubuntu, i installed it in an old PC and now it works GREAT!!! My Macbook pro has a glitch and refuses to run Mac OS X, so i installed Windows, and i really want Ubuntu since Windows is not for me. Here's the problem(s) my drive only READS DVDs, if i put a blank in it, it will ignore it and my mac has the updated EFI, so no booting from a USB connected device! I also tried Wubi, but then i cant make it a FULL partition and get rid of windows!!! Thank you!

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• mount another drive to the same directory

  - by Ken Autotron

  I recently purchased a server that was advertised as 2TB (2 1TB drives) in size, when I use it it reports only one of the drives, I would like to be able to use both as if one drive. here is the specs... sudo lshw -C disk *-disk description: ATA Disk product: TOSHIBA DT01ACA1 vendor: Toshiba physical id: 0.0.0 bus info: scsi@1:0.0.0 logical name: /dev/sda version: MS2O serial: 13EJ81XPS size: 931GiB (1TB) capabilities: partitioned partitioned:dos configuration: ansiversion=5 signature=0005b3dd *-disk description: ATA Disk product: TOSHIBA DT01ACA1 vendor: Toshiba physical id: 0.0.0 bus info: scsi@4:0.0.0 logical name: /dev/sdb version: MS2O serial: 13OX3TKPS size: 931GiB (1TB) capabilities: partitioned partitioned:dos configuration: ansiversion=5 signature=00030e86 and fdisk -l Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00030e86 Device Boot Start End Blocks Id System /dev/sdb1 * 4096 41947135 20971520 fd Linux raid autodetect /dev/sdb2 41947136 1952468991 955260928 fd Linux raid autodetect /dev/sdb3 1952468992 1953519615 525312 82 Linux swap / Solaris Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x0005b3dd Device Boot Start End Blocks Id System /dev/sda1 * 4096 41947135 20971520 fd Linux raid autodetect /dev/sda2 41947136 1952468991 955260928 fd Linux raid autodetect /dev/sda3 1952468992 1953519615 525312 82 Linux swap / Solaris Disk /dev/md2: 978.2 GB, 978187124736 bytes 2 heads, 4 sectors/track, 238815216 cylinders, total 1910521728 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/md2 doesn't contain a valid partition table Disk /dev/md1: 21.5 GB, 21474770944 bytes 2 heads, 4 sectors/track, 5242864 cylinders, total 41942912 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/md1 doesn't contain a valid partition table is it possible to mount both drives to say /Home/ so I would have 2TB of usable space?

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• Should I reorder partitions regarding performance

  - by Marcel

  I have in principal 3 big partitions on my Netbook. One Windows, one for shared files, one for Ubuntu. I recently find out (using hdparm) the the hardisk seems to have much better perfomance on the first 2/3 (~ 60MB/s) than on the last 1/3 (~ 40MB/s). I am thinking to delete the second partition and create new partitions for "swap" and / directly after Windows. Does this effort make sense? I also wanna upgrade to 10.4/10.10 but keep the option to go back to the old system, so maybe I install ubuntu completely in a/this new partition?

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• Error in Using Gparted to add Unallocated space

  - by Ba7a7chy

  I'm trying to Add Unallocated space to my Ubuntu partition which is inside an extended partition. i get this error: GParted 0.12.1 --enable-libparted-dmraid Libparted 2.3 Move /dev/sda3 to the left and grow it from 93.31 GiB to 219.75 GiB 00:00:00 ( ERROR ) calibrate /dev/sda3 00:00:00 ( SUCCESS ) path: /dev/sda3 start: 292,704,254 end: 488,394,751 size: 195,690,498 (93.31 GiB) move partition to the left and grow it from 93.31 GiB to 219.75 GiB 00:00:00 ( ERROR ) old start: 292,704,254 old end: 488,394,751 old size: 195,690,498 (93.31 GiB) requested start: 27,545,600 requested end: 488,392,703 requested size: 460,847,104 (219.75 GiB) libparted messages ( INFO ) Unable to satisfy all constraints on the partition. Can't have overlapping partitions. ========================================

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• How to partition USB drive for Ubuntu installation?

  - by Heather

  I am not a computer savvy and need to know how to partition my USB drive without messing up my laptop. I already have the boot order set up properly and the USB drive already has the ISO image downloaded onto it. I am ready for install but just do not know how to partition. I am installing Ubuntu 12.4 LTS onto a USB. Can someone help me? I need an easy walk through please. What I need to know is from the screen shots above do I use the swap drive and if so how do i partition that drive to be my drive? I am stuck up to this part on the installation process. Yes please make a list of the steps for me.

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• Can't access my accelerated hard disk from msdos after installing linux on ssd cache

  - by Chibueze Opata

  I mistakenly installed Ubuntu on my ssd (forgot my PC actually came with one), when it detected a ~31GiB disk that it wanted to install to, I was a bit confused since I had brought out 30Gb in my primary disk for it, but I clicked continue. After installation, I tried to boot back into my Windows and it brought out some Intel Raid Disk Utility stuff saying I should disable acceleration on a disk something couldn't be found, I canceled it but whatever I tried, recovery tools, setups etc, I couldn't just access the drive which was apparently using the SSD as cache. Since then I've been stuck. I tried setting the 'raid' flag to the disk from 'gParted', still I couldn't. I tried the diskraid utility from windows recover disk, it said it couldn't detect any raid, diskpart sees the partition but doesn't see the volume, when I remove the raid flag, it sees the volume as one of raw type, and I can't access anything. I can however mount the drive from terminal in Ubuntu and access my files, but I don't have any backup media at the moment so I can do a factory re-install. Please how do I go about solving the issue, precisely I would like to know how to boot into the drive again. Thanks!

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• How to make a disk image and restore from it later?

  - by Torben Gundtofte-Bruun

  I'm a new Linux user. I've reinstalled my Wubi from scratch at least ten times the last few weeks because while getting the system up and running (drivers, resolution, etc.) I've broken something (X, grub, unknowns) and I can't get it back to work. Especially for a newbie like me, it's easier (and much faster) to just reinstall the whole shebang than try to troubleshoot several layers of failed "fixing" attempts. Coming from Windows, I expect that there is some "disk image" utility that I can run to make a snapshot of my Linux install (and of the boot partition!!) before I meddle with stuff. Then, after I've foobar'ed my machine, I would somehow restore my machine back to that working snapshot. What's the Linux equivalent of Windows disk imagers like Acronis True Image or Norton Ghost? Note: I found a similar question here.

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• Efficient solution for multiplayer space partioning?

  - by DevilWithin

  This question is a little tricky, but I will try to make it clear, Lets say I am building an online game, not in a mmo scale, but gladly supporting as many players as possible, in a authoritative server approach, and I want really big worlds with lots of AI simulated enemies. I am aware of a few strategies to save server's CPU by subdividing the space and not processing what doesn't need processing. I 've already split the world by regions, that will require loading times and small transitions, which i think is important to mantain the quality of gameplay when playing locally (alone or even with a couple of friends) because the players won't normally be in more than one or two regions. But even a region can become pretty big, and have a lot of NPC simulating at a time, how do I handle this without screwing the player's experience? Approaches like one server per region and alike are not in the table. I am mainly looking for data structures to hold hordes of enemies, and even peaceful NPC. To finalize the question, please note that vehicles exist, therefore its considerably fast to travel within a region, influencing the "when" to cull areas. Sorry for the confusing question, thanks

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• Recover partition after GParted resizing interrupted by unexpected shutdown

  - by user84207

  As I was resizing my partitions using GParted, my laptop battery ran out, and the process was interrupted. Now, I am unable to mount the partition which I was trying to resize. I get the following error when I click to mount the partition on nautilus: Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sda3, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so How can I go about recovering my data? Is there a safe way to attempt to force-mount the partition in question? Any help towards recovering my data is sincerely appreciated.

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• GParted doesn't see any partition

  - by Diego

  What I am trying to do couldn't be more logical I think. I have a 40gb drive with two partitions, Xp and Ubuntu. I have dual boot, everything boots and works perfectly. I have about 9gb free in the Windows partition When I run Gparted I only see 40gb unallocated space, booting from Gparted Live CD. What the hell is going on ? I've read everywhere this is a common problem, however it has no sense something like this remains unsolved by gparted developers, considering what I am trying to do is the very basic step anybody wanting to migrate from Windows to Linux would od Something like this honestly doesn't give anything else than frustration Could anybody on this forum be so kind to explain whats' going on ? Thanks

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• UEFI Dual-Boot - Ubuntu 12.04.3 + Windows 8.1 (One GPT HDD)

  - by swafbrother

  UEFI Dual-Boot - Ubuntu 12.04.3 + Windows 8.1 (One GPT HDD) Hello, I'm having trouble setting up a dual-boot (Ubuntu 12.04 LTS and Windows 8.1) in my ASUS K55VM laptop's hard drive disk (500 GB). I was mostly following tutorials for doing this, but at some point something has gone wrong. Up to now, I have followed these steps: I formatted my HDD into GPT. I clean-installed Windows 8.1. I didn't prevent Windows from choosing the partitions to use and it created these partitions: A Recovery partition (sda1). An EFI System Partition (sda2). A Microsoft Reserved Partition (sda3). A Windows Data Partition or C drive (sda4). I reduced the Windows Data Partition via Windows' Disk Management. I made a bootable USB Stick with Ubuntu 12.04 LTS from ISO, using Universal USB Installer. I created these partitions for Ubuntu: A Boot partition, mounted at /boot (sda5). A Root partition, mounted at / (sda6). A Swap partition (sda7). In Device for boot loader installation I chose: /dev/sda. Then, when I rebooted, it went straight into Ubuntu. So I installed Boot-Repair, and clicked on Recommended Repair. It automatically did its job without asking for anything. I rebooted and Grub showed up, with a lot of options. At this point I had a decent dual-boot setup; Ubuntu and both Windows entries worked fine: Ubuntu. Windows Boot UEFI Loader. Windows UEFI bkpbootmgfw.efi. I executed this command: sudo grub-install --force /dev/sda5. Then I tried to make Windows 8.1's Boot Manager the main boot manager, so that I could choose which OS to boot into from a menu. I downloaded EasyBCD on Windows. It showed 2 Ubuntu entries and 1 Windows entry. I went into BCD Deployment tab and clicked on Write MBR. At this point, I went into BIOS and made Windows Boot Manager the first boot option. When I rebooted, I got a black screen with the message efidisk read error, and then (I guess) it switched to the next boot option, which is Ubuntu, resulting in Grub showing up. From Grub, Ubuntu entry is working and so are both Windows entries. If I choose Ubuntu, it normally boots into Ubuntu. But if I choose Windows, it goes into Windows' boot manager. In Windows' boot manager, a menu shows up: Ubuntu. Ubuntu. Windows 8.1. If I choose Windows, it boots into Windows without any problem. If I choose Ubuntu, it boots into Grub (back to step 14). Here's my BootInfo Summary: http://paste.ubuntu.com/6698171/ Windows Boot Manager is clearly not working as expected; I can't directly boot into it and I can't boot into it from BIOS either (efidisk read error again). If I want to boot into Windows I need to boot into Grub first, which is the opposite of what I wanted. I need help at this point. What is the best thing I can do? Is there a more reliable and/or simpler way of acomplishing a satisfying dual-boot for this situation? Can someone provide a way for going back to step 8, where I had a more efficient dual-boot setup? If only I could undo what I did with Easy BCD and skip Windows' Boot Menu... Can someone provide a way to fix this mess? Thanks in advance and sorry for the length of this, I wanted to be exhaustive.

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• HP ENVY TouchSmart 15t-j000 Quad Edition + custom mSata Plextor M5M 64GB SSD

  - by Akash Ramani

  The ssd did not come along with the laptop, so i bought one myself and physically installed it. I've booted into Ubuntu from a USB drive and my goal is to install / and /home in the SSD. (because most of the actual media exists on the HDD) The only problem is i'm unable to detect the SSD while configuring the partitions. I know the SSD is not the problem because it recognizes in a different laptop. I've followed the instructions shown in https://help.ubuntu.com/community/UEFI but that still doesn't help in identifying the SSD partition. Any help would be appreciated. (p.s: I'm wondering if i have to prepare the SSD through windows or something like that)

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• scritp to create automatically ext4 and swap in unallocated diskspace

  - by user285589

  i've to install a number of machines. Some machines have windows 7 installed. Some machines not. The machines have 0 or 2 or 3 partitions. Every machine has enough free diskspace (20 to 250 GB) I installed an "golden client" and build an tar archiv of this client. Now, every client boots up a small linux via pxe, and run a script. This script should create a ext4 and a swap partition using the whole free space. After this, mount the ext4-partition, copy tar, chroot, and so on. The problem still is: I can create partitions using fdisk. But how can i figure out the partion number of the new partition. Do i have to mount /dev/sda3 or /dev/sda1? Someone an idea? Further question: How can i figure out, if the is unallocated space, and how much it is? Thanks

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• Ubuntu confuses my partitions

  - by Diego

  I have 3 relevant partitions split between 2 disks, sda2: Windows 1 partition sda3: Ubuntu partition sdb1: Data partition I was using pysdm to add a label to my partitions and somehow I seem to have screwed up my installation. Now, every time I access the Data partition mounted in /media/Data I see the files in my Windows partition, and viceversa. I've tried unmounting and remounting correctly to no avail, it seems that wherever I mount sda2, if I access that folder I get the files in sdb1, and viceversa. Anyone know what may have happened and how to solve this? Update: This is the result of blkid: /dev/sda1: LABEL="System Reserved" UUID="C62603F02603E073" TYPE="ntfs" /dev/sda2: LABEL="Windows" UUID="00A6D498A6D49010" TYPE="ntfs" /dev/sda5: UUID="033cac3b-6f77-4f09-a629-495dc866866a" TYPE="ext4" /dev/sdb1: LABEL="Data" UUID="BCD83AE3D83A9B98" TYPE="ntfs" These are the contents of my ftsab file: UUID=033cac3b-6f77-4f09-a629-495dc866866a / ext4 errors=remount-ro,user_xattr 0 1 /dev/sda1 /media/Boot_old ntfs defaults 0 0 /dev/sda2 /media/Windows ntfs defaults 0 0 /dev/sdb1 /media/Data ntfs nls=iso8859-1,ro,users,umask=000 0 0

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• What is the kd tree intersection logic?

  - by bobobobo

  I'm trying to figure out how to implement a KD tree. On page 322 of "Real time collision detection" by Ericson The text section is included below in case Google book preview doesn't let you see it the time you click the link text section Relevant section: The basic idea behind intersecting a ray or directed line segment with a k-d tree is straightforward. The line is intersected against the node's splitting plane, and the t value of intersection is computed. If t is within the interval of the line, 0 <= t <= tmax, the line straddles the plane and both children of the tree are recursively descended. If not, only the side containing the segment origin is recursively visited. So here's what I have: (open image in new tab if you can't see the lettering) The logical tree Here the orange ray is going thru the 3d scene. The x's represent intersection with a plane. From the LEFT, the ray hits: The front face of the scene's enclosing cube, The (1) splitting plane The (2.2) splitting plane The right side of the scene's enclosing cube But here's what would happen, naively following Ericson's basic description above: Test against splitting plane (1). Ray hits splitting plane (1), so left and right children of splitting plane (1) are included in next test. Test against splitting plane (2.1). Ray actually hits that plane, (way off to the right) so both children are included in next level of tests. (This is counter-intuitive - shouldn't only the bottom node be included in subsequent tests) Can some one describe what happens when the orange ray goes through the scene correctly?

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