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  • How does Ubuntu LVM encryption work?

    - by Sridhar Ratnakumar
    While installing Ubuntu Server, during the partition step one of the options is "use entire disk and set up encrypted LVM" (see screenshots). Can anyone explain how it works under the hood? What kind of tools/technologies/algorithms are used? How exactly does this possibly prevent thieves from getting access to the data in the hard disk?

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  • RAID 5 configuration and future expansion

    - by Alexis Hirst
    hi, I am building a PC to act as a file server among other things, and I was wondering whether it is a good idea to create 2 partitions on the RAID 5 array, one for OS one for data, or to have a separate disk for OS and use array for data. Also, one day i may want to add another disk to the array, so would there be any issues if I had the OS partition on the RAID5 array when it came to resizing the data partition?

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  • Setting up a dualboot by installing cloned partitions using clonezilla

    - by Nimjox
    I'm trying to setup a dual boot system where I have Windows 7 and Linux Mint. Here's the kicker both are partitions I've saved using Clonzezilla from different places and to make matters worse Linux Mint is formated as a LVM. I need both of these images specifically as windows is a corporate image that I must use and the other is a development image that took me a week to setup. I've gotten it almost all working but my issue is that I can't get clonezilla to not mess up the partition table of Windows when installing Mint or vise-vera. I can use the (-k1 option) which doens't copy the partition table but then I have a unusable partition when it clones and I'm not sure how to fix the partition table. Here's what I'm doing: Using Gparted to make partitions sda1 40GB ntfs (windows), sda2 extended 70GB, sda5 lvm2 pv 69.99 GB (Linux), sda3 500MB (GRUB) Clonezilla windows image into sda1 partition (keeping partition table) Clonezilla linux image into sda5 partition (not recreating partition table) After all that I can boot into windows using the default MBR. I can use rescue-repair cd to reinstall GRUB which will see Windows 7 but I can't get it to see the Linux OS. I'm thinking its because of the sda5 partition but I'm not sure any ideas on what I could do to get this working or where I might be going wrong. If there is any additional detail you need please let me know and I'll edit as this is a lot.

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  • Device Manager - does USB listing look right?

    - by Carl
    I obtained the drivers from the manufacturer for my HT-Link NEC USB 2.0 2-port Cardbus card. When I plugged in the card before I got the drivers, 3 new entries showed up in the Device Manager - two "NEC PCI to USB Open Host Controller" and one "Standard Enhanced PCI to USB Host controller." With the card plugged in, I uninstalled those two drivers. I then removed the card. I copied the new drivers to c:\windows\system32\drivers and the .inf file to c:\windows\inf. I also copied the drivers & inf to a new directory called c:\windows\drivers\ousb2. I reinserted the card. Windows automatically installed the same drivers as before. I selected 'update driver' on the "NEC PCI to USB..." entry and didn't see any other options. I then selected 'have disk' and pointed to c:\windows\drivers\ousb2 and got a message "The specified location does not contain information about your hardware." I then selected 'update driver' on the "Standard Enhanced PCI to USB...," and manually selected "USB 2.0 Enhanced Host Controller" (OWC 4/15/2003 2.1.3.1). Windows then automatically found a USB root hub, and I manually selected "USB 2.0 Root Hub Device" (OWC 4/15/2003 2.1.3.1). Now there are two sections in the Device Manager titled "Universal Serial Bus controllers." I plugged in my external USB hard disk adapter, and "USB Mass Storage Device" was added to the first set. Here's how it looks (w/drivers from the properties): [Universal Serial Bus controllers] Intel(R) 82801DB/DBM USB 2.0 Enhanced Host Controller - 24CD (6/1/2002 5.1.2600.0) Intel(R) 82801DB/DBM USB Universal Host Controller - 24C2 (7/1/2001 5.1.2600.5512) Intel(R) 82801DB/DBM USB Universal Host Controller - 24C4 (7/1/2001 5.1.2600.5512) Intel(R) 82801DB/DBM USB Universal Host Controller - 24C7 (7/1/2001 5.1.2600.5512) NEC PCI to USB Open Host Controller (7/1/2001 5.1.2600.5512) NEC PCI to USB Open Host Controller (7/1/2001 5.1.2600.5512) USB Mass Storage Device USB Root Hub (7/1/2001 5.1.2600.5512) (5 more USB Root Hubs - same driver) [Universal Serial Bus controllers] USB 2.0 Enhanced Host Controller (OWC 4/15/2003 2.1.3.1) USB 2.0 Root Hub Device (OWC 4/15/2003 2.1.3.1) When I unplug the card the two "NEC PCI to USB..." entries in the first set disappear, and the whole second set disappears. (I unplugged the hard disk adapter first...) The hard disk adapter still doesn't work in that Cardbus card with the new drivers. I don't think the above looks right - a second set of USB controllers listed in the Device Manager, and the NEC entries still in the first set, and the the USB mass storage device still in the first set. Any help appreciated. (Windows XP PRO SP3 w/all current updates.)

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  • GEDIT problem on Windows

    - by Inaimathi
    Every once in a while (5 minutes or so), gedit interrupts my typing with a little "This file has changed on disk" message and asks me if I'd like to reload it. I know that the file isn't being changed. It's located on a local disk only I am editing it if I click "reload" on the dialog, there is no visible change in the file This doesn't happen in other text editors like Emacs or EditPlus. Does anyone know what the problem is and/or how to fix it?

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  • Best practice for setting up SQL server on a Virtual Machine

    - by CrazyCoderz
    This is my first attempt at virtualizing SQL server on VMWare and I want to make sure I am doing things correctly. Should I have SQL server installed on the C: drive / same partition as the OS, Then add a virtual disk for the Data files, say 300GB, and then another virtual disk for the log files say 100GB? Or should I add 2 300GB vdisks, for the data files mirror them in the operating system, and then add a non mirrored vdisk of 100GB for LogFiles??

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  • Hypervisor load on local disks

    - by Chris
    Hi, What is the I/O load on the local disk system for the host OS in XenServer ? I can't find this info anywhere. As we have a SAN for the VMs themselves, can we get away with cheap controller / SATA disk in raid-1 for the hypervisor ? We won't boot from the SAN as it seems prone to problems. Thanks, Chris

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  • Should I install software on a "SAN"

    - by am2605
    Hi, I need to set up ColdFusion 9 on a ubuntu server that has a SAN disk mounted. Is it appropriate to install the CF server software on this disk? I don't really understand the ins and outs of what a SAN is, so I am not sure if the intention is for me to solely install web content on it or whether the server software itself should go here too. Any advice would be extremeness welcome. Many thanks, Andrew.

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  • prevent filesystem from entering read-only mode

    - by user788171
    I have found that my server's filesystem is continuously entering read-only mode. There have been some issues with the raid1 array, but I have removed the bad disk from the array. However, it is still physically plugged into the system because I haven't had a chance to go over to the datacentre, I suspect udev and the system kernel is still picking up the bad disk and throwing errors. In /var/log/messages, there are errors like this: Mar 2 06:53:14 nocloud kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x4010000 action 0xe frozen Mar 2 06:53:14 nocloud kernel: ata1: irq_stat 0x00400040, connection status changed Mar 2 06:53:14 nocloud kernel: ata1: SError: { PHYRdyChg DevExch } Mar 2 06:53:14 nocloud kernel: ata1: hard resetting link Mar 2 06:53:20 nocloud kernel: ata1: link is slow to respond, please be patient (ready=0) Mar 2 06:53:21 nocloud kernel: ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) Mar 2 06:53:21 nocloud kernel: ata1.00: configured for UDMA/133 Mar 2 06:53:21 nocloud kernel: ata1: EH complete This happens fairly randomly throughout the day until eventually the filesystem becomes read-only. When this happens, my system becomes non-operational which kind of defeats the purpose of having a raid1. Note, ata1 is the bad disk (I think ata1 corresponds to /dev/sda because they are both first in line). Under mdadm, /dev/sda1,2 is no longer being used, but I can't prevent the system kernel from continuing to query that disk when I am no longer using it and throwing these errors. Is there a way to prevent my filesystem from automatically going into read-only mode? Furthermore, is it safe to do so? Thanks in advance. EDIT: Additional information: output from cat /proc/mdstat md1 : active raid1 sdb2[1] 976554876 blocks super 1.1 [2/1] [_U] bitmap: 5/8 pages [20KB], 65536KB chunk md0 : active raid1 sdb1[1] 204788 blocks super 1.0 [2/1] [_U] Output from mount: /dev/mapper/VolGroup-LogVol00 on / type ext4 (rw,noatime) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0") /dev/md0 on /boot type ext4 (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) EDIT2: pvdisplay output: --- Physical volume --- PV Name /dev/md1 VG Name VolGroup PV Size 931.32 GiB / not usable 2.87 MiB Allocatable yes (but full) PE Size 16.00 MiB Total PE 59604 Free PE 0 Allocated PE 59604

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  • How do I mount the EFI partition on Windows 8.1 so that it is readable and writeable?

    - by RyanTM
    Here is what I do: restart machine with Windows 8.1 determine "EFI System" parition with the Disk Management utility run command prompt as administrator type diskpart type select disk 0 then select partition 2 then assign open windows explorer windows+e refresh if the drive is not showing F5 try to open drive by double clicking What I expected to happen: I can at least look at my EFI partition files. What happened: after clicking continue after clicking "security tab" link, no security tab What do I need to do to access my EFI partition on Windows 8.1?

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  • Mac OS X kernel panic after TM restore

    - by Sev
    I changed my HD in my MacBook Pro, and restored from Time Machine backup. Now I keep getting kernel panic error everytime I restart. I booted from the DVD and ran a few tests, noticed that HD and RAM are being detected, also did a repair on the disk through disk utility, still getting same error. Any suggestions?

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  • Gigabyte GA-970A-UD3 mobo won't boot from USB flash drive

    - by user38586
    I am trying to boot BAMT a Debian flavor via USB on a brand new Gigabyte GA-970A-UD3 motherboard. I tried various flash drive and various OS. I never had this problem with ASUS and MSI. The problem is from Gigabyte hardware. I found that my BIOS is very strict about MBR compatibility. Now I can boot in DOS mode. The flash drive need to be formated as a Win98 Startup disk using HP USB disk storage format tool. Unetbootin menu is booting from USB but won't install BAMT. If I use Windows or Linux diskimager the working MBR is deleted. I tried converting BAMT .img to .iso and it is not booting with Unetbootin. Is it possible to boot BAMT(Debian Linux) from a Win98 DOS command prompt? Maybe there is a way to burn the image and keep the working MBR? If the working MBR is deleted, the flash drive is not recognized at all by the BIOS. This is the info I found that got me booting for the first time in DOS: GB's BIOS will only boot USBs formatted to FAT-32, conforming to normal MBR bootloader. I've seen this before, and surmised that the 'stick-maker' was formatting in ReiserFile, or one of the EXT 'flavors', but no one ever followed up to confirm or deny... Also, if it's putting the bootloader into its own partition - won't work! In the BIOS, on the "Integrated Peripherals" page, the "USB Storage Function" item must be enabled (which should be the default) to allow USB booting... I've put a little work into a 'GB USB booting tutorial', and frankly, I'd just go ahead and finish it up for you, but I really don't want to reboot the several times it will take me to 'firm up' procedural details, and take the BIOS/boot pictures for the post - just noticed VAIL finally went 'public beta', so will be downloading for likely twenty-six hours or so There's likely enough there to test a 'raw DOS boot', just to see if your hardware (especially the USB stick itself) will do it... Some post later: Fixed. Here is a brief summary. Since my ubuntu live usb sticks (2gb kingston and 8gb sandisk sd/usb reader - fat32, created in ubuntu 10.04) would not boot this board even though they would boot my ga-ep45-ud3p, I decided to try bilbat's suggestion with the HP usb boot program. I created the win98 boot disk on the kingston 2gb stick without reformatting. It booted right up. Next, I used windows version of unetbootin to write the ubuntu live cd to the kingston disk. This fired right up and completed the install. Everything seems to be in good order now. Unfortunately I can boot in DOS mode but can't boot BAMT.

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  • How do I change the default for the "df" command in the Unix terminal from KILOBYTES TO MEGABYTES?

    - by user1656014
    I can't really show the code in Unix, but I can explain it very clearly. In the terminal, when you type "df", you get information on the disk free space all in KILOBYTE units. KILOBYTES is currently set as the default in Unix. My problem is trying to change the default from KILOBYTES to MEGABYTES. After changing of the default, I should be able to type in "df" and all the disk free space should come up in MEGABYTES.

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  • Are Time Machine backups secure?

    - by Leandro Ardissone
    I have my Time Machine backups on an external disk (WD My Passport with no hardware encryption) and I'm worried if the data stored on the disk is safe in case somebody steals it and connect it to any Mac/PC. Does any Mac can browse the Time Machine backups? Or are they encrypted in any way? If no, is there a way to improve security of the backups, should I buy a hardware encryption based HD? Thanks.

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  • Why VM snapshots are affecting performance?

    - by Samselvaprabu
    I read in one of the VMware KB article says that snapshots will directly proportional to VM performance. But my team keep asking me how snapshots can affect performance. I would like to give them solid reason behind the statement that snapshots are performance killers. Can any one explain a little bit theory behind why actually snapshots are affecting the performance? Is it just because Disk I/O rate of hard disk would be slow?

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  • Using a flash drive to speed up conventional disks (on linux)

    - by Daniel
    Hi! Is there a possibility to use a flash drive as a speed up for conventional hard disks? I got the idea to redirect all read ops to the flash drive if the data is already stored there, and to read from the conventional disks if the data is not found there (and during idle time the freshly accessed data from the conventional disk is stored on the flash disk). Is this already possible with linux standard tools?

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  • Windows Setup could not configure Windows to run on this computer's hardware

    - by Hello71
    The whole installation goes smoothly up to the point of "Completing installation ...". The monitor changes resolution, after which a standard dialog box pops up saying Windows Setup could not configure Windows to run on this computer's hardware Then, in a few seconds, the whole machine powers down. Trying to restart produces the message: STOP: c000021a {Fatal System Error} 0x00000000 (0xc0000001 0x00100448) OR it boots into Setup and comes up with the message: Windows Setup encountered an unexpected error... (This is not the actual error, just paraphrasing) I tried using the OEM restore instead of a regular install, but it fails with the same error. (Even though it worked before...) General specs: HP Pavilion Elite e9262f Intel Core i5-750 Processor ATI Radeon HD 4650 Hitachi HDT721010SLA360 ATA Device 6GB DDR3 RAM SuperMulti DVD Burner with LightScribe Some built-in Wi-Fi module http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01916917 I've tried disconnecting the wireless card and disabling the built-in Ethernet and Firewire via the BIOS, and replacing the wireless keyboard and mouse with wired USB ones. Didn't work. I've also tried changing the SATA controller settings in the BIOS to RAID, AHCI, and IDE, reinstalling each time I changed. Still not working. I think the reason why it is showing the Fatal System Error is because it didn't finish installing before it errored out and shut down, so the system is left in an inconsistent state. I've tried 3 different copies (including the OEM restore) of Windows 7 now, and they're all failing at the same point, with the same error message. I've tried to install Windows 7 maybe 10 times already, with the exact same error message at the exact same location. Hm... Interestingly, the 32-bit version of Windows 7 works, but the 64-bit version doesn't. Perhaps it was a badly burned disk? Reburning the 64-bit version still comes up with the same error. Here's a picture of the side of the case that clearly says it came with Windows 7 64-bit, along with the model number and CPU. sudo fdisk -l: Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0009896f Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 7 HPFS/NTFS /dev/sda2 14 94119 755906445 7 HPFS/NTFS /dev/sda3 119922 121602 13492224 7 HPFS/NTFS /dev/sda4 94120 119922 207257740+ 5 Extended /dev/sda5 119527 119922 3170769 82 Linux swap / Solaris /dev/sda6 107174 119526 99225441 83 Linux /dev/sda7 94120 107173 104856192 7 HPFS/NTFS Partition table entries are not in disk order

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  • How to recycle/reuse/continue Time Machine for a new Mac?

    - by bmargulies
    I have been backing up a MacBook Pro to an external hard disk with Time Machine. I got a new laptop, used the firewire connector to pull the universe across to it, and started it up. It does not want to just pick up where I left off with the backups; it wants to start a new backup sequence and thus I need a ton of additional disk space. Does anyone know a way to force it to just incrementally back up to the existing backup set?

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  • How to enable an external USD harddrive with ubuntu

    - by LarsOn
    Hello I'm trying to install a new LaCie Hard Disk design by Neil Poulton 1TB USB 2.0 GParted reports /dev/sda1 (with exclamation mark and key sign) ntfs 1 KiB unallocated 320 MiB /dev/sda2 hfs+ 2.84 MiB unallocated 931.2 GiB When trying to create a partition with Disk Utility it says Daemon is inhibited It seems I can't create the partition that way. Can you recommend how I can proceed? Thank you

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  • How can I configure apache to cache the images that it is serving? Right now it is giving headers t

    - by Tchalvak
    Serving up images that don't seem to cache There's a LAPP (postgresql instead of mysql) running over on http://ninjawars.net. I just recently noticed that images don't seem to be caching with any kind of good frequency as I was reloading a page with a few images on it here: http://www.ninjawars.net/attack_player.php Here is an example image (they're probably all being served exactly the same): http://www.ninjawars.net/images/characters/fighter.png Checking the header, it seems that the caching is set to: Cache-Control:max-age=0 (the full header for this image-like-all-the-others is... Request URL:http://www.ninjawars.net/images/characters/fighter.png Request Method:GET Status Code:200 OK Request Headers Accept:application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,/;q=0.5 Cache-Control:max-age=0 Referer:http://www.ninjawars.net/images/characters/fighter.png User-Agent:Mozilla/5.0 (X11; U; Linux x86_64; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.3 Safari/533.4 Response Headers Accept-Ranges:bytes Content-Length:938 Content-Type:image/png Date:Thu, 13 May 2010 21:24:07 GMT ETag:"ffd4d-3aa-4837efc120540" Last-Modified:Mon, 05 Apr 2010 15:28:45 GMT Server:Apache ) So what modules or config or htaccess or whatever do I change to have it cache images, e.g. for 24 hours?

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  • How to boot Linux and Windows - Windows as Default OS

    - by lions_leash
    I have a dual boot system that works great. I have Ubuntu and XP 64 on one disk and XP on another disk. The Linux boot loader asks me which system to boot, but if I reboot and forget to hit a button, it goes to Linux by default. I would like to boot to XP by default, but somehow retain the option of choosing.

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  • Cannot assign a letter to a FAT32 partition

    - by Toc
    I have an external hard disk where I have created many partitions to use also in Linux. First two partitions are FAT32. The third is a Truecrypt partition. I cannot assign a letter to the second partition. When I go to Manage disk and right-click on the unassigned partition, most of the options are not enabled. What have I to do to see this partition on my XP PC?

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  • NetInstall working on some systems, not working on others

    - by cduruk
    Hi, I'm having an issue where my NetInstall setup works on some computers and fails on others. I am not able to diagnose the issue. I created an image of a Mac Mini and then created a NetRestore image using the System Image Utility found on Snow Leopard Server. NetBoot and NFS all seem to be working fine on the server, which is an XServe. Then I select the NetInstall image from the Startup Disk on a machine. On some of the machines, the process works as expected. On some of them, I see the globe icon blink a few times and then the system boots to the regular hard drive. I have captured the tracedump and the system.log logs from the server on both cases where NetInstall seems to work and fail. Here is the link that has all the logs http://gist.github.com/232232 The gist of the failure seems to be from the lack of BSDP DISCOVER in the failure but I'm not able to identify why that exactly is happening. I'd really appreciate any help on this issue.

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