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• Booting ubuntu from usb hdd: GRUB menu not shown

  - by emanemos

  Hello, could anyone help me to boot ubuntu-9.04 from usb hard disk? This disk contains /boot primary partition. During ubuntu installation I used "Advanced" button and asked to install GRUB to the /boot partition. Later I checked whether GRUB files are really present in this partition. They are. However, I get stuck while trying to boot. The boot menu ("ubuntu generic version", "ubuntu recovery mode", etc...) is not shown. Instead I am thrown to GRUB minimal bash-like version. I feel at a loss and have no idea why I am pointed to this minimal version. Can anybody prompt me what to do?

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• slow disk writes between host and guest

  - by Jure1873

  I've got a ubuntu (server kernel) on a amd x4, 4gb ram, 2x seagate sata 1 tb disks for testing virtual machines and the write performance is very slow. The two disks are in a software raid1 array, one small boot ext3 partition, 10gb system partition and the rest is a xfs partition (about 980) gb for data (virtual machines). If I'm copying files from the virtual machine to the host with rsync or scp the copy frequently stalls or goes at about 1mb/s. What's wrong? I've tried disabling barriers on xfs, increased logbufs, allocsize, but it seems nothing helps. The strange thing is that await (for example during copying) for sda is usually under 100, while for sdb is around 400. Any ideas on what could be wrong / what could I do to improve this setup?

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• Completely formatting a USB flash drive

  - by efcjoe

  I have a Verbatim Store 'n' Go drive which by default comes with software in a partition which password protects the drive. I want to erase this partition, as it only works on Windows (I'm having to look at it now through a virtual machine on my Mac). I've tried using KillDisk to totally wipe the whole thing, but it doesn't seem to work, and this password-protecting partition always remains intact. Is there any program which will completely wipe a flash drive, no questions asked? Or is there a way to do it through the Verbatim software? I have the password and everything, I just can't find a way to fully format it. Cheers.

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• Reverse lookup of inode/file from offset in raw device on linux and ext3/4?

  - by lilinjn

  In linux, given an offset into a raw disk device, is it possible to map back to an partition + inode? For example, suppose I know that string "xyz" is contained at byte offset 1000000 on /dev/sda: (e.g. xxd -l 100 -s 1000000 /dev/sda shows a dump that begins with "xyz") 1) How do I figure out which partition (if any) offset 1000000 is located in?(I imagine this is easy, but am including it for completeness) 2) Assuming the offset is located in a partition, how do I go about finding which inode it belongs to (or determine that it is part of free space) ? Presumably this is filesystem specific, in which case does any one know how to do this for ext4 and ext3?

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• Possible to recover older, previously deleted files with R-studio?

  - by SteveO

  The files and directories on one of my ntfs partition were wiped out last time. I used R-studio to scan the partition, and it did find many files, actually more than the capacity of the partition. This is because R-studio found files that were deleted even earlier. So I wonder if it is possible to specify those files and directories deleted last time instead of those deleted earlier for recovery? R-studio has a free demo version, for which scanning is free,but recovery isn't. It is downloadable from http://www.data-recovery-software.net/Data_Recovery_Download.shtml Its manual is here http://www.r-tt.com/downloads/Recovery_Manual.pdf. I have tried my best to search for answers in the manual, but failed to find one. Their technical support is not as good as their software, and helpless usually in my opinion. Thanks!

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• How could all of my hard drives fail at once?

  - by Taylor

  I have an Ubuntu 13.04 server. Today I found the box had crashed. I restarted it, and now every single hard drive's partition table is missing. (1 SSD for /boot, /, and 3 2TB drives for RAID). I have the SSD connected to a laptop VIA USB-SATA cable, and sure enough, the partition table is missing. This tells me that the Motherboard / SATA controller / software actually broke the drives, not that they just can't be read correctly. Something similar happened to only the SSD a few months ago, and I was forced to just re-partition it. How the heck could his have happened? Bad Motherboard or SATA controller?

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• Seagate 1TB 'EXPANSION' external hard drive, showing as BAD

  - by Dave Plews

  Hello! I have bough an external Seagate 1TB drive, which my XP system can see and will write files to, however when I use Partition Magic it describes the whole partition as BAD, and it is shown in yellow. All the options are greyed out. When I use Drive Image XML to try and copy drive to drive (I want a comlplete copy of my C drive including OS), I get an error message saying it can't lock the drive. The external drive is brand new and uses NTFS. Any ideas? Seagate 'support' haven't bothered getting back to me. Incidentally, I have another external drive (320GB), which uses FAT32 and Partition Magic sees that fine. I am doing a full format of the Seagate at the moment, to see if this helps. Thanks in advance!

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• Windows + Jolicloud crash!

  - by SystmHck

  My girlfriend's Acer Aspire One netbook just crashed running Windows XP. It crashes at the boot process, displays the blue screen for a second and then reboots. I also installed Jolicloud through Jolicloud Express but I am not able to boot it either. I suspect it's a virus... When running a Ubuntu live session from a pendrive it seems like the Acer partition is corrupted. In a partition program it says to run chkdsk in Windows to fix it. I have used Ubuntu for a while but I am not an expert so I wanted to ask: How do I restore my NTFS damaged partition?

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• Corrupted files, hard drive test?

  - by all-R

  Hi guys, I'm currently on a macbook with a 1TB external hard drive connected trough a USB hub wich is connected on my macbook. The problem is, my disk, wich is partitioned in 2 (one HFS+ and one NTFS) keeps getting corrupted, recently it was my HFS+ partition, I could not repair it using the Apple's Disk utility, but was able to backup my files. Is it synonym that my hard drive is failing? Is it because of my USB hub? I also keep all my iTunes library on my external HD (HFS+ partition), and did a lot of transfer lately, adding files, removing etc. the last time, my partition got corrupted after a lot of deleted items. If anybody has an idea of what to check first, what could cause the problem, I would appreciate it :) Thanks!

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• Linux/OS X dualboot on a Macbook Pro with RAID

  - by GaretJax

  I'd like to install Gentoo Linux on my Macbook Pro by keeping my current OS X installation. I currently have OS X installed on a RAID 0 on two 160GB Intel SSDs and I'd like to create a new partition for Gentoo alongside OS X without losing the RAID setup but, from what I read on the net, Apple's software RAID is poorly (read "not at all") supported: BootCamp refuses to create a windows partition on a RAID volume rEFIt is not able to boot an OS from a software RAID even Apple's recovery partition for Lion can't be created on a RAID volume Is there a way to dual boot my Macbook while keeping the RAID solution?

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• RAID 5 heavy IO hard freezes Ubuntu: Why?

  - by Luke has no name

  I have a software RAID 5 partition on LVM in Ubuntu (desktop, actually, but I'm using it as a server). I have been rsyncing a ton of data to it, and the computer was hard freezing, as in I needed to press "Reset". So I thought it was rsync. But I decided I'd try a dd if=/dev/zero of=/path/to/raid5 and sure enough, the computer locked up. Did an identical dd to a JBOD partition on the same machine, and it didn't crash. Assuming a clean RAID5 partition, tri-core processor 2GB of ram, 6GB swap, what could be causing this?

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• Booting an EXT4 image file from GRUB2

  - by sjjg

  My friend needed a fast HDD so I gave her my small 64GB SDD. This SSD had my Linux install on it. I used dd to make an image of the partition (boot, root and home on one partition). This partition is now sitting on a traditional 500GB EXT4 formatted drive. Is there any way I can get GRUB to just boot using this .img file I have? I'm not getting my SSD back and I can't be bothered to go through the hassle of setting up my Linux install from scratch. I have come across loopback support in GRUB for ISO images. Does this support EXT4 also? I don't seem to be able to find anything specific and don't want to trash anything. Cheers.

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• Can I enlarge OS C: drive of my Windows 8 PC?

  - by Sorgatz

  Last year I got a new Western Digital WD Blue 500GB HDD to replace my old drive. The first thing I did was to install latest Windows 8. While installing Windows 8 I created 3 partitions, C drive for the OS and others for storage. The OS partition is 120GB (which at the time I thought would be plenty big) but I'm now realizing its too small! I wonder if it's possible to re-size HDD partition without reformatting and re-install my Windows 8. So that is my question, Can i enlarge os c drive of my windows 8 without having to re-format? I've used the Norton Partition Magic and Disk Management to make this happen but there doesn't seem to be any options to make it happen. Thanks for any help you guys can give regarding my question. I've worked hard to optimize my current install of Windows 8 and would hate to start all over again.

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• How can I create a bootable CD-ROM/USB Drive? (With NTFS + USB Drive support)

  - by RonK

  My motherboard got fried and I was forced to get a new hardware set (MB+CPU+RAM) so in most likelyhood I'll need to reinstall my Windows 7. I usually follow procedure and put the OS on the primary partition and my data on a logical partition - so I can format the primary without concern - but this time I made a mistakte and left some crucial items on the primary partition. I want to create a bootable CD-ROM/USB Drive which can read NTFS so I can access this data. If booting via a CD-ROM, I would prefer being able to connect a disk-on-key/My Passport to the computer and be able to access it to transfer the data to it. How can I do it? (free 3rd party applications are most welcome)

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• Which OS should I boot into for virtualization?

  - by acidzombie24

  This might be a silly question. I use windows 7 99% of the time. I run linux 10% of the time and XP 5% of the time. I am thinking about getting a Intel® Core™ i7-2600 Processor which has hardware support for virtualization. I dont think i want more than one partition. May have a swap partition. Which OS should I make my primary (and only) partition? I suspect windows7 if i am always using it as going through a linux layer would slow it down. Does it matter much which OS i use if i have hardware support for virtualization? At the moment I am using VMWare player. I suspect software doesnt effect performance?

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• Will readyboost speed up a secondary partion or harddrive?

  - by Sebastian

  I'm building a new computer and plan on using a few spare USB sticks with readyboost to cache disk writes. I'll be running Windows 7 Enterprise SP1 x64 I have a single 2 TB disk, and plan to make a partition for windows (100 GB) and use the rest for data. I know Readyboost will work nicely for the C drive, but am unable to find any information on whether it will accelerate a second drive or partition. Just to clarify, I'm NOT trying to use the harddrive instead of the usb sticks. I'm trying to speed up the second partition using the USB sticks So, will readyboost work for a secondary partion or harddrive?

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• Move 2TB Win7x64 to 640GB HDD

  - by reedacus25

  Basically I just got a new (refurbished) HP H8-1260t to use for Windows Media Center. The shipping drive is a 2TB Hitachi drive, but I have an older and barely used 640GB WD Caviar Blue 7200RPM drive I would like to move my Windows install to. I have about 750GB of data with over 1TB free left on the drive. Having googled my heart and fingers out, I would think that I can shrink my partition down to the size it is full at now with over 1TB free for a second partition where I can move my media files to further shrink my boot partition so that I can fit a system image smaller than 640GB on that WD drive. I want to have a separate drive for Media and TV Recordings from my boot disk. Does this sound like the easiest method for me? Or am I doing this all wrong. Help appreciated.

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• How to perform a nested mount when using chroot?

  - by user55542

  Note that this question is prompted by the circumstances detailed by me (as Xl1NntniNH7F) in http://www.linuxquestions.org/questions/linux-desktop-74/boot-failure-upon-updating-e2fsprogs-in-ubuntu-10-10-a-947328/. Thus if you could address the underlying cause of the boot failure, I would very much appreciate it. I'm trying to replicate the environment in my ubuntu installation (where the home folder is on a separate partition) in order to run make uninstall. I'm using a live cd. How to mount a dir in one partition (sda2, mounted in ubuntu as the home folder) into a directory on another mounted partition (sda3)? I did chroot /mnt/sda2 but I don't know how to mount sda3 to /home, and my various attempts didn't work. As I am unfamiliar with chroot, my approach could be wrong, so it would be great if you could suggest what I should do, given my circumstances.

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• Use `dd` linux program to save / recover a disk's MBR

  - by Graduate

  I have an Ubuntu OS installed on my laptop. I want to install Windows 7 as well to another disk partition (I will do it by recovering it from a special partition on my laptop). After installing Windows, I want to recover my hard drive MBR to be able to load Ubuntu. I have a plan to use linux dd program: 1) (Before installing, perform this command in Linux) dd if=/dev/sda of=/home/user/mbr_backup bs=512 count=1 2) (after installing, load Ubuntu Live CD and launch this) dd if=/home/user/mbr_backup of=/dev/sda bs=512 count=1 3) Load Ubuntu on PC and re-configure the GRUB2 to be able start Windows I need your advice, I want to be sure I won't damage the disk (it's partition table).

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• Missing hard drive total space in Windows

  - by bluedot951

  I have an HP Pavilion DM4 with a 750 GB hard drive. A few days ago, I installed Windows 8 on it, so I am now dual booting Win7 and Win8 (and I also have a 100 MB system reserved partition). I noticed that I am only able to see 700 GB of hard disk space (169 for Win 8 and 529 for Win 7). I booted of an Ubuntu 11.04 LiveCD and in the disk utility it said that my Win 8 partition is 182 GB and my Win 7 partition is 568 GB, correctly adding up to 750 GB. I would like to reclaim the missing space in its respective partitions. Any advice on how to go about doing this?

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• swapon --all --verbose : 'read swap header failed: Invalid argument'

  - by user66088

  Recently ran through EnableHibernateWithEncryptedSwap and ran the following command: swapon --all --verbose and received: 'read swap header failed: Invalid argument' How do I fix this? Here's some more pertinent output... Output of sudo fdisk -l: Disk /dev/sda: 80.0 GB, 80026361856 bytes 255 heads, 63 sectors/track, 9729 cylinders, total 156301488 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00006d20 Device Boot Start End Blocks Id System /dev/sda1 * 2048 499711 248832 83 Linux /dev/sda2 501758 156301311 77899777 5 Extended /dev/sda5 501760 156301311 77899776 8e Linux LVM Disk /dev/mapper/ubuntu--t10194-root: 75.5 GB, 75539415040 bytes 255 heads, 63 sectors/track, 9183 cylinders, total 147537920 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/ubuntu--t10194-root doesn't contain a valid partition table Disk /dev/mapper/ubuntu--t10194-swap_1: 4227 MB, 4227858432 bytes 255 heads, 63 sectors/track, 514 cylinders, total 8257536 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x08040000 Disk /dev/mapper/ubuntu--t10194-swap_1 doesn't contain a valid partition table Disk /dev/mapper/cryptswap1: 4225 MB, 4225761280 bytes 255 heads, 63 sectors/track, 513 cylinders, total 8253440 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xd2236983 Disk /dev/mapper/cryptswap1 doesn't contain a valid partition table Thanks for any and ALL help!

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• Gnome 3 freezes on logon on samsung RV 509

  - by Noufal

  I have a Samsung NP-RV509 A0FIN and I tried to install GNU/Linux with gnome 3.2 on it. I tried Fedora 16, Ubuntu 11.10 and Linux Mint 12 RC, but with no success. All of these freezes upon login into gnome shell. I think it is the problem with graphics driver, so I tried xorg-edgers ppa on my last installation, ie., Linux Mint. I also tried various intel graphics packages listed on Synaptic package manager, but no success again. My device configuration is as follows(obtained from windows 7): More details about my computer Component Details Subscore Base score Processor Intel(R) Pentium(R) CPU P6200 @ 2.13GHz 5.6 4.6 Memory (RAM) 4.00 GB 7.2 Graphics Intel(R) HD Graphics 4.6 Gaming graphics 1562 MB Total available graphics memory 5.2 Primary hard disk 12GB Free (50GB Total) 5.9 Windows 7 Ultimate System -------------------------------------------------------------------------------- Manufacturer SAMSUNG ELECTRONICS CO., LTD. Model RV409/RV509/RV709 Total amount of system memory 4.00 GB RAM System type 32-bit operating system Number of processor cores 2 64-bit capable Yes Storage -------------------------------------------------------------------------------- Total size of hard disk(s) 418 GB Disk partition (C:) 12 GB Free (50 GB Total) Media drive (D:) CD/DVD Disk partition (E:) 526 MB Free (191 GB Total) Disk partition (F:) 101 GB Free (177 GB Total) Graphics -------------------------------------------------------------------------------- Display adapter type Intel(R) HD Graphics Total available graphics memory 1562 MB Dedicated graphics memory 64 MB Dedicated system memory 0 MB Shared system memory 1498 MB Display adapter driver version 8.15.10.2202 Primary monitor resolution 1366x768 DirectX version DirectX 10 Network -------------------------------------------------------------------------------- Network Adapter Realtek PCIe GBE Family Controller Network Adapter Broadcom 802.11n Network Adapter Network Adapter Microsoft Virtual WiFi Miniport Adapter Notes -------------------------------------------------------------------------------- The gaming graphics score is based on the primary graphics adapter. If this system has linked or multiple graphics adapters, some software applications may see additional performance benefits. Any help is appreciated, and thanks in advance.

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• Fixing unbootable installation on LVM root from Desktop LiveCD

  - by intuited

  I just did an installation from the 10.10 Desktop LiveCD, making the root volume an LVM LV. Apparently this is not supported; I managed it by taking these steps before starting the GUI installer app: installing the lvm2 package on the running system creating an LVM-type partition on the system hard drive creating a physical volume, a volume group and a root LV using the LVM tools. I also created a second LV for /var; this I don't think is relevant. creating a filesystem (ext4) on each of the two LVs. After taking these steps, the GUI installer offered the two LVs as installation targets; I gladly accepted, also putting /boot on a primary partition separate from the LVM partition. Installation seemed to go smoothly, and I've verified that both the root and var volumes do contain acceptable-looking directory structures. However, booting fails; if I understood correctly what happened, I was dropped into a busybox running in the initrd filesystem. Although I haven't worked through the entirety of the grub2 docs yet, it looks like the entry that tries to boot my new system is correct: menuentry 'Ubuntu, with Linux 2.6.35-22-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod part_msdos insmod ext2 set root='(hd0,msdos3)' search --no-floppy --fs-uuid --set $UUID_OF_BOOT_FILESYSTEM linux /vmlinuz-2.6.35-22-generic root=/dev/mapper/$LVM_VOLUME_GROUP-root ro quiet splash initrd /initrd.img-2.6.35-22-generic } Note that $VARS are replaced in the actual grub.cfg with their corresponding values. I rebooted back into the livecd and have unpacked the initrd image into a temp directory. It looks like the initrd image lacks LVM functionality. For example, if I'm reading /usr/share/initramfs-tools/hooks/lvm2 (installed with lvm2 on the livecd-booted system, not present on the installed one) correctly, an lvm executable should be situated in /sbin; that is not the case. What's the best way to remedy this situation? I realize that it would be easier to just use the alternate install CD, which apparently supports LVM, but I don't want to wait for it to download and then have to reinstall.

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• Java crashes on lubuntu but not Ubuntu

  - by Echogene

  I have lubuntu and Ubuntu partitions on my drive. I've been having an interesting time with the new lubuntu partition. I've encountered strange things with the game Minecraft, Java and graphics drivers on the lubuntu partition. Firstly, I'll say that Minecraft runs fine at about 60fps on the Ubuntu partition with the latest drivers. (This is lower than it should be as it's a pretty decent graphics card [Radeon HD 5700].) When I first started lubuntu, I tried to see if I could get Minecraft running on Java. Java crashed when loading the main game graphics on both Sun and OpenJDK without proprietary drivers. Java also crashed on both Javas with proprietary drivers after the necessary restart. However, after disabling (with 'remove' button) the proprietary drivers with jockey-gtk in the session after the restart to install the drivers, Minecraft ran very well at ~120fps. This didn't continue after another restart, when it ran at 9fps. After failing thereafter on lubuntu to get it working at 15fps, I tried reinstalling lubuntu and installed the exact same driver (the latest one, not the one appearing on jockey) and Java versions as on Ubuntu. That is, now Ubuntu and lubuntu have the same graphics driver and Java version. Minecraft still crashes in the same way on lubuntu but works fine on Ubuntu. I would appreciate any explanation for any of these events. What differences between lubuntu and Ubuntu could cause this? Edit: After installing the 32bit driver version on lubuntu (seeing as lubuntu is 32bit), I have Java "working" for Minecraft. However, it is at <15fps again and it can't log in to servers as it takes too long.

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• SQL SERVER – 2014 CTP1 Available for Download – SQL SERVER 2014 Community Technology Preview 1

  - by Pinal Dave

  Microsoft announced that SQL Server 2014 CTP 1 available to download at TechEd Europe. You can download SQL Server 2014 CTP1 from here. Additionally, there is in depth documentation of the product in the Product Guide over here. In this blog post I have in depth discussed what are the salient features which I was looking forward in the new version. Always On supports now 8 secondaries instead of 4 Online Indexing at partition level – this is a good thing as now index rebuilding can be done at a partition level Statistics at the partition level – this will be a huge improvement in performance In-Memory OLTP works by providing in-application memory storage for the most often used tables in SQL Server. Columnstore Index can be updated – I just can’t wait for this feature (Columnstore Index) Resource Governor can control IO along with CPU and Memory Increase performance by extending SQL Server in-memory buffer pool to SSDs Backup to Azure Storage You can read about the new features of the SQL Server 2014 in the following links: What’s New (Database Engine) What’s New in Analysis Services and Business Intelligence What’s New (Integration Services) What’s New (Replication) What’s New (Reporting Services) Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Service Pack, SQL Tips and Tricks, T SQL, Technology Tagged: CTP

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