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• How do I recover my accidentally lost Windows partitions after installing Ubuntu?

  - by Totally newbie

  I have a Toshiba satellite A-200 laptop with a Vista OS on it with 4 NTFS partitions (C:) Vista (D:) Entertainment (E:) Work (F:) Sources and I wanted to start using Ubuntu instead. So I tried it first from the live CD and everything was OK and all the partitions were shown and working and so I decided to install Ubuntu to replace Vista on the (C:) drive. After I did that I can no longer find my folders and files on the (D:), (E:), (F:) partitions and the only file system that is shown is one 198 GB although my HDD is 320 GB. I can't access the lost data on the remaining 120 GB which I hope is still there and not totally lost I am now working from the live CD but I am unable to install testdisk. Can I recover the Vista partitions by the product recovery CD to get my laptop back to the factory settings? Can I recover the NTFS partitions using a recovery program for Windows or will that make the problem worse? I need these data badly as I don't have a backup for them.

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• System crashed while upgrading, now unable to recover. Please help

  - by longloop

  Yesterday while upgrading from 11.4 to 11.10, due to power cut my system crashed. Ubuntu is unable to boot. While booting I get two options in grub, one is for recovery mode and the other is for normal ubuntu booting (and others are also thr for mem check and booting to windows). When I try to boot it normally, it pauses booting while displaying ' Checking battery statues' . Though i am not using a laptop, I am on a desktop. And In recovery mode the menu has 4 options - resume boot, fsck , remount and root ( to goto shell prompt) . If I go to shell and type ' apt-get dist upgrade' , it shows - W: not using locking for read only lock file /var/lib/dpkg/lock E:unable to write to /var/cache/apt E:The package lists or status files could not be parsed or opened. Please instruct me to recover from this situation.

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• How Google does disaster recovery

  Will you be ready when disaster strikes? It's an uncomfortable question for many IT administrators, because answering it with confidence usually requires boatloads of money, immense complexity, and...

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• Simplified Restores with SQL Server 2012 Recovery Advisor

  Occasionally, a DBA may need to restore a database from a multiple backup files that originated from multiple servers. This requirement might arise, for example, in a database-mirroring configuration, where backups may be from either of the servers. Get smart with SQL Backup ProGet faster, smaller backups with integrated verification.Quickly and easily DBCC CHECKDB your backups. Learn more.

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• Practically Cloudy: SQL Server Disaster Recovery to Microsoft Azure - Backups

  In the first in a series on the practicalities of using the Microsoft Azure Platform for the SQL Server professional, Buck Woody shows that, whatever your version of SQL Server, there is a way of storing offsite backups in the cloud. Can 41,000 DBAs really be wrong? Join 41,000 other DBAs who are following the new series from the DBA Team: the 5 Worst Days in a DBA’s Life. Part 3, As Corrupt As It Gets, is out now – read it here.

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• What free space thresholds/limits are advisable for 640 GB and 2 TB hard disk drives with ZEVO ZFS on OS X?

  - by Graham Perrin

  Assuming that free space advice for ZEVO will not differ from advice for other modern implementations of ZFS … Question Please, what percentages or amounts of free space are advisable for hard disk drives of the following sizes? 640 GB 2 TB Thoughts A standard answer for modern implementations of ZFS might be "no more than 96 percent full". However if apply that to (say) a single-disk 640 GB dataset where some of the files most commonly used (by VirtualBox) are larger than 15 GB each, then I guess that blocks for those files will become sub optimally spread across the platters with around 26 GB free. I read that in most cases, fragmentation and defragmentation should not be a concern with ZFS. Sill, I like the mental picture of most fragments of a large .vdi in reasonably close proximity to each other. (Do features of ZFS make that wish for proximity too old-fashioned?) Side note: there might arise the question of how to optimise performance after a threshold is 'broken'. If it arises, I'll keep it separate. Background On a 640 GB StoreJet Transcend (product ID 0x2329) in the past I probably went beyond an advisable threshold. Currently the largest file is around 17 GB –  – and I doubt that any .vdi or other file on this disk will grow beyond 40 GB. (Ignore the purple masses, those are bundles of 8 MB band files.) Without HFS Plus: the thresholds of twenty, ten and five percent that I associate with Mobile Time Machine file system need not apply. I currently use ZEVO Community Edition 1.1.1 with Mountain Lion, OS X 10.8.2, but I'd like answers to be not too version-specific. References, chronological order ZFS Block Allocation (Jeff Bonwick's Blog) (2006-11-04) Space Maps (Jeff Bonwick's Blog) (2007-09-13) Doubling Exchange Performance (Bizarre ! Vous avez dit Bizarre ?) (2010-03-11) … So to solve this problem, what went in 2010/Q1 software release is multifold. The most important thing is: we increased the threshold at which we switched from 'first fit' (go fast) to 'best fit' (pack tight) from 70% full to 96% full. With TB drives, each slab is at least 5GB and 4% is still 200MB plenty of space and no need to do anything radical before that. This gave us the biggest bang. Second, instead of trying to reuse the same primary slabs until it failed an allocation we decided to stop giving the primary slab this preferential threatment as soon as the biggest allocation that could be satisfied by a slab was down to 128K (metaslab_df_alloc_threshold). At that point we were ready to switch to another slab that had more free space. We also decided to reduce the SMO bonus. Before, a slab that was 50% empty was preferred over slabs that had never been used. In order to foster more write aggregation, we reduced the threshold to 33% empty. This means that a random write workload now spread to more slabs where each one will have larger amount of free space leading to more write aggregation. Finally we also saw that slab loading was contributing to lower performance and implemented a slab prefetch mechanism to reduce down time associated with that operation. The conjunction of all these changes lead to 50% improved OLTP and 70% reduced variability from run to run … OLTP Improvements in Sun Storage 7000 2010.Q1 (Performance Profiles) (2010-03-11) Alasdair on Everything » ZFS runs really slowly when free disk usage goes above 80% (2010-07-18) where commentary includes: … OpenSolaris has changed this in onnv revision 11146 … [CFT] Improved ZFS metaslab code (faster write speed) (2010-08-22)

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• Windows Backup (2008 R2) recovery and timezone

  - by GrZeCh

  Hello, does difference between timezones on Windows Server 2008 where backup was made and reovery console makes difference? Recovery console (wbadmin from command line too) is not finding any backup on local hard drive connected to server. Thanks EDIT: I'm working on Windows Server 2008 R2 EDIT2: This is not related to timezone. When I connected backup hard drive from Windows 2008 R2 Release Candidate recovery console runned from RTM system version DVD found stored backups from it without problems.

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• Recovery partition is 'visible' while hidden

  - by jroeleveld

  For some reason the recovery partition of windows is appearing while it is hidden. With hidden I mean hidden in Disk management and Diskpart. This partition causes the screen to flicker sometimes, as it is continuously switching between being visible and hidden. Sometimes however, it is just visible. In the attached screenshots you can see the configuration. Translation: partitie=partition, In orde = OK, Verborgen = hidden, Lokale schijf = local disk, Herstelpartitie = recovery partition

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• Iomega Home Media Network Hard Drive: Accesing the data in the disk?

  - by JJarava

  Hi all! I have an Iomega Home Media Network Hard Drive, 1TB, and lately I can't access the data on the drive. The shares (both built-in and created by me) are there, the security works, but when trying to access the data I get a "The network path was not found" message which is worrying, to say the least. I'd like to know if there is a way to get the data off the disks somehow, as some of the data in the drive (ie, pictures and videos of my 1.5 yrs old son) is hard if not impossible to find otherwise. Thanks a lot Javier

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• “Disk /dev/xvda1 doesn't contain a valid partition table”

  - by Simpanoz

  Iam newbie to EC2 and Ubuntu 11 (EC2 Free tier Ubuntu). I have made following commands. sudo mkfs -t ext4 /dev/xvdf6 sudo mkdir /db sudo vim /etc/fstab /dev/xvdf6 /db ext4 noatime,noexec,nodiratime 0 0 sudo mount /dev/xvdf6 /db fdisk -l I got following output. Can some one guide me what I am doing wrong and how it can be rectified. Disk /dev/xvda1: 8589 MB, 8589934592 bytes 255 heads, 63 sectors/track, 1044 cylinders, total 16777216 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/xvda1 doesn't contain a valid partition table Disk /dev/xvdf6: 6442 MB, 6442450944 bytes 255 heads, 63 sectors/track, 783 cylinders, total 12582912 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/xvdf6 doesn't contain a valid partition table.

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• Can you recover from a backup with bad blocks?

  - by Macbook-Recovery

  The hard drive in my Macbook recently gave up while using it on the plane (dual prop, lots of vibration unfortunately). I have a backup of its contents from a few weeks ago, but there are files that aren't included in it that I would like to recover. As it stands right now, I have it plugged to my macbook by USB. Snow leopard recognizes it, but can't mount it. Therefore, tools like Diskwarrior and Techtools do not work. I started doing a clone of it with Data Rescue 3, but after 7 hours of activity (20% through the drive), it has copied 130 GB of the drive but reports all of the data as "bad blocks". My question is this: Is any data recoverable if the clone is completely composed of bad blocks?

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• Moving Windows XP from ICH10R RAID 5 to single disk using Linux [migrated]

  - by tudor

  A friend's machine running Windows XP refused to boot recently which is running 3 SATA disks on RAID 5 (which was previously upgraded from RAID 1 not by me). I have determined there to be a disk failure. The disks have been replaced many times in the past few years. I wish to backup the RAID5 partition before I try anything to fix it. The RAID chipset used is ICH10R/DO. So, I plugged in an extra IDE drive and an Ubuntu USB key and looked at the RAID. The partitioning is a mess, but I did find at least one degraded but working RAID array with two partitions, one 79GB and the other 86GB. Then I: 1) Partitioned my IDE disk using fdisk to have a partition of 80GB and bootable, and marked as NTFS. 2) dd the contents of the array to the partition 3) disconnected everything else 4) inserted a Windows XP CD and ran fixboot, fixmbr, and bootcfg. They all run ok and claim that they worked. (e.g. bootcfg detects the Windows partition, fixboot returns saying that it was written correctly.) However, I'm still getting an error like "DISK FAILURE, BOOT DISK NOT FOUND". I have tried running the GRUB rescue disk, which also runs ok, but won't boot into Windows. It just stops with a flashing cursor after chainloader +1, boot. One clue may be that the partitions appear to be wack. One disk has a 79GB RAID partition on a 500GB drive with a offset, the second disk has a 320GB RAID partition across the whole drive. Additionally, the BIOS lists the RAID size as being 149GB. I don't see how this works. How are they even assembling the array when the partitions are so different? I have also tried running the Windows XP automated repair tool, but that didn't work either. I'm presuming this is something simple. Perhaps Windows is attempting to boot into RAID and, upon not finding it, simply crashing? Perhaps the 79GB partitions offset means that it's looking into the disk by that much? Please help!! To clarify: I want to make the single IDE disk bootable with a copy of the array so that I can prove/disprove that it's just that Windows has become corrupted, and use windows tools to correct it before attempting the same thing on the RAID array. That way I have a working backup and can show the process I used to fix it.

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• Can't connect disk management to remote XP PC from local Win7/Server 2008

  - by Grez

  Scenario as follows: support technicians using Windows 7 PC's or Server 2008 terminal server are unable to connect Disk Management MMC snap in to a remote PC when the remote device is running Windows XP. "Disk management could not start Virtual Disk Service (VDS) on ". This can happen if the remote computer does not support VDS, or if a connection cannot be established because it was blocked by Windows Firewall." Connecting from another XP machine or 2003 server to the same XP machines works fine. Even connecting from XP/2003 to the Win7 or 2008 server works fine. Windows firewall disabled on all devices. I'm guessing this is something to do with the fact that XP uses logical disk manager service whereas Win7/2008 use Virtual disk manager service. But there doesn't seem to be any way to use logical disk manager service from 7/2008 to connect to XP...

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• Formatted USB flash drive with Disk Utility on Mac and now it is not recognized on any Mac or Windows machine

  - by Željko Filipin

  I have formatted Canyon CN-MP4A USB flash drive with Disk Utility on Mac and now it is not recognized on any Mac or Windows machine. I have formatted with Disk Utility > drive > Erease > Format > MS-DOS (FAT). Now when I plug it in any Mac or Windows machine, nothing happens. Like nothing is plugged in. It has a screen, and I was able to format it directly from the device before, but now when I turn it on, welcome screen appears, but nothing else. I can not get to the menu. Is there a way I can format it? I am looking for the answer on the internet, but no luck so far.

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• Is it reasonable that a random disk seek & read costs ~16ms?

  - by fzhang

  I am frustrated about the latency of random reading from a non-ssd disk. Based on results from following test program, it speeds ~16 ms for a random read of just 512 bytes without help of os cache. I tried changing 512 to larger values, such as 25k, and the latency did not increase as much. I guess it is because the disk seek dominates the time. I understand that random reading is inherently slow, but just want to be sure that ~16ms is reasonable, even for non-ssd disk. #include <sys/stat.h> #include <sys/time.h> #include <sys/types.h> #include <sys/unistd.h> #include <fcntl.h> #include <limits.h> #include <stdio.h> #include <string.h> int main(int argc, char** argv) { int fd = open(argv[1], O_RDONLY); if (fd < 0) { fprintf(stderr, "Failed open %s\n", argv[1]); return -1; } const size_t count = 512; const off_t offset = 25990611 / 2; char buffer[count] = { '\0' }; struct timeval start_time; gettimeofday(&start_time, NULL); off_t ret = lseek(fd, offset, SEEK_SET); if (ret != offset) { perror("lseek error"); close(fd); return -1; } ret = read(fd, buffer, count); if (ret != count) { fprintf(stderr, "Failed reading all: %ld\n", ret); close(fd); return -1; } struct timeval end_time; gettimeofday(&end_time, NULL); printf("tv_sec: %ld, tv_usec: %ld\n", end_time.tv_sec - start_time.tv_sec, end_time.tv_usec - start_time.tv_usec); close(fd); return 0; }

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• Solaris disk I/O spike... which monitoring tools do I need?

  - by bonez05

  Hi all, My Solaris 10 websever / database server disk io keeps spiking at intermittent times. Using iostat -xtc 5 the reads / sec will jump from 3.0 to 1450.0 and %busy will jump to 98% The apache access log doesn't indicate anything out of the ordinary. In other words, requests aren't any higher than usual. top doesn't generate anything useful. The cpu usage is fine with mysql using about 20% and nothing else to speak of really. What monitoring tool should I be using to see what process is using excessive disk I/O? or if there are any other suggestions I'm all ears. Thanks

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• Volume size doesn't match Disk size after gparted expansion

  - by Cybersylum

  I just expanded a basic disk on a Windows XP VM from 15gb to 40 gb using GPARTED LiveCD (0.5.2-11). I didn't notice anything unusual during the expansion; but after I rebooted back into Windows, the disk capacity doesn't match the disk size as it should (only 1 volume on the disk). The disk shows as 40gb; but the C: volume still shows the original size. I've tried expanding the disk again with GPARTED (no change), and using VMware converter and have it adjust the size of the volume during the process (complains about a lack of space of snapshot error inside the os). The volume has 27% free space so I don't think it is a space issue. Chkdsk doesn't seem to find anything wrong either. The OS seems to run just fine, it doesn't see the additional space however. Any ideas?

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• Dell 2950 Perc 6/i "physical disk" and "Enclosure(Backplane)" under Connector 1 in OMSA tree- Troubleshoot help

  - by user66357

  Just looking for someone who might know why this could occur... In OMSA, on my Dell 2950, there usually is only one "Physical Disks" child under "Enclosure (Backplane)" in the tree view. Currently, the tree looks like this: Dell PERC 6/i Integrated Connector 1 (RAID) Enclosure (Backplane) Physical Disks (1:04 good, 1:05 removed) Physical Disks (1:33 Ready but unused) Normally it's like this: Connector 1 (RAID) Enclosure (Backplane) Physical Disks (1:04 good, 1:05 good) From the front, 6 of 6 3.5" SAS drives are connected. The server is showing Slot 5 as bad and the disk as removed. It seems that the drive in Slot 5 is being sensed as external to the Enclosure. Any ideas why this would happen? Think I can get away with rebuilding the virtual disk by replacing 1:05 with 1:33? Thanks.

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• Can I "branch" VirtualBox snapshots (base multiple VM on the same disk image + separate diffs)?

  - by Thilo

  I keep multiple VirtualBoxes for different projects. They are all running the same Debian base system. Keeping complete copies of all the disk images is getting expensive. Is there a way that I can base multiple VM on the same (read-only) disk image, with (hopefully small) diffs layered on top? This is just like snapshots work, except that there is no concept of "current" and "previous", they are more like branches. Or can I just use snapshots (of the "same" VM) for this? I would be wanting to run more than one of those snapshots concurrently.

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• SQL Server database filled the hard drive and freeing up space isn't possible

  - by Jon

  I have a database in SQL Server 2008 on a 1Tb hard drive and it filled the drive, there is only 4Kb free. The MDF file is 323Gb and the LDF is 653Gb. The hard disk this DB is on has no other files on it other than the MDF and LDF so it's impossible to free up any space on the drive. The main hard disk is smaller but there is enough room to transfer the MDF to that drive, in case that helps. This server is overseas at a customer site and it's not possible at the moment to add more disk space to the server. It's also not possible to delete any records because the DB is in a failed mode (due to no disk space) and it doesn't respond to most commands. The Db is currently in full recovery mode which is why the LDF file is so large. This DB really doesn't need to be in full recovery so going forward we plan on switching it to simple mode which will save us a lot of space. I also don't care about losing the LDF file, but I need all of the data. I've spent a lot of time looking for a way out of this problem but everything I've found first involves either freeing up disk space or adding more disk space, neither of which is an option at this time. I'm stuck and any help would be greatly appreciated. I get the following log when trying to switch the DB to online mode. Msg 945, Level 14, State 2, Line 3 Database 'DBNAME' cannot be opened due to inaccessible files or insufficient memory or disk space. See the SQL Server errorlog for details. Msg 5069, Level 16, State 1, Line 3 ALTER DATABASE statement failed. Msg 1101, Level 17, State 12, Line 3 Could not allocate a new page for database 'DBNAME' because of insufficient disk space in filegroup 'DEFAULT'. Create the necessary space by dropping objects in the filegroup, adding additional files to the filegroup, or setting autogrowth on for existing files in the filegroup. I've found the following solutions but none work due to having no disk space on that drive, and since the DB is in a failed state I can't run most commmands. - DBCC SHRINKFILE - can't be run because doing a 'use DBNAME' fails - Detaching the DB and then changing the location of the MDF/LDF files, this fails because the DB is in an offline mode so you can't run detach. I'm at a loss about what else to try. Thanks.

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• Can not boot windows XP from cloned hard disk - what can I do?

  - by Martin

  My configuration: a PC (some years old) with MSI K8N-Neo-4F Motherboard, 1 GB RAM. Disk 1 (Maxtor, SATA II, 250 GB): 2 Partitions, on Partition 1 (48 GB): Windows XP Professional (NTFS) on Partition 2 (190 GB): data (NTFS) I wanted to have a larger and faster disk (the PC is incredibly slow and permanently the disk is rattling when I try to open an application or during Windows startup), so I took Disk 2 (Seagate, Sata II, 500 GB), installed in the PC, created at first a 400 GB-partition at the end of the disk and cloned the data to it, which worked well Installed a swap partition and a partition for Ubuntu Linux 12.10 on the first "part" of the disk so I was able to boot Linux and the old Windows XP with the Linux "System selection" at startup. Now I wanted to move Windows XP to the new disk, deleted the Linux partitions cloned Windows XP to the new disk (with free tools - EASESUS), left both disks in the PC and tried to select the new hard drive during boot as boot partition. This did not work, the PC refused to boot from this second disk. I tried many things like making the boot partition on the 2nd drive "active" in the Windows System Preferences modifying the boot.ini file to boot from the second disk - tried to boot from it, but ended with an error message stating that it was not possible to boot from this disk because of a hardware failure or something else or so removing the original disk and plugging the new one on the same SATA port as the original one - also booting failed with an error message repairing the MBR by booting into recovery mode from the Windows XP Installation CD-ROM, selecting the second disk and doing "FIXMBR" which said that everything was fine with the MBR. after that at least the PC tried to boot from the newer disk and then startup was hanging during the blue screen with the Windows Logo.... no luck. ... deleting the cloned partition and cloning again - this time with Macrium Reflect Free version... - no success during booting. I tried a lot of things with no success, so I wonder what I am doing wrong?! What could I do to successfully clone my Win XP partition to replace the original disk by a larger one which is bootable.

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• grub2 error: out of disk

  - by Carl Smotricz

  I'm trying to make a 250G USB hard disk Ubuntu-bootable on a Compaq nc6220 laptop. I've removed all other disks, so /dev/sda (the USB disk) is the only disk other than CDROM. I installed Ubuntu 9.10 to this disk from the live CD, putting the bootloader on /dev/sda . The default system couldn't be booted, and nothing I did in the Grub menu/cmdline helped. So I chrooted onto the disk and did grub-install /dev/sda. That seemed to work fine, but Grub (1.97 beta 4) keeps coming up with error: out of disk Even when I drop to the command line to do something simple like ls or help, it's always the same error message. Any hints for resolving this, please?

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• Does installing windows format the hard disk?

  - by Jason

  My Google search for ""does installing windows format the hard disk" returns: No results found for "does installing windows format the hard disk". I was quite surprised. I'm hoping to get a quick answer here. Does an install format the hard disk, and destroy all data, including non-os/s data? -Or do you specifically have to say "format" at some point so you know you are losing everything? [I tried to go to SP3, but it doesn't work on my computer. My SP2 disk is fired. I only have a SP1 disk, with a seperate SP2 package. I can't get to Safe Mode to uninstall SP3 ("Windows XP Setup cann run under Safemode. Setup will restart now.). I don't want running the SP1 disk to destroy any non-o/s data.] Thanks.

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• Unable to format/add a partition to Windows XP

  - by sma

  I recently add a 1T disk to an XP machine. I found the disk in the "disk management", I click "initialize" to init it, then creates a primary partition with size 950G, then select quick format to format the disk, the "disk management" will then complains: The disk configuration operation did not complete. Check the system event log for more information on the error. Verify the status of your storage devices before retrying. If that does not solve the problem, close the disk management console, then restart disk management or restart the computer. What could be the reason?

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• How to Combine Rescue Disks to Create the Ultimate Windows Repair Disk

  - by The Geek

  We’ve covered loads of different anti-virus, Linux, and other boot disks that help you repair or recover your system, but why limit yourself to just one? Here’s how to combine your favorite repair disks together to create the ultimate repair toolkit for broken Windows systems—all on a single flash drive. The ones we’ve covered already? Here’s a quick list of all the ways you can recover your system with a rescue disk: How to Use the Avira Rescue CD to Clean Your Infected PC How to Use the BitDefender Rescue CD to Clean Your Infected PC How to Use the Kaspersky Rescue Disk to Clean Your Infected PC Change or Reset Windows Password from a Ubuntu Live CD The 10 Cleverest Ways to Use Linux to Fix Your Windows PC Change Your Forgotten Windows Password with the Linux System Rescue CD Use Ubuntu Live CD to Backup Files from Your Dead Windows Computer If you need to clean up an infected system, we’d absolutely recommend the BitDefender CD, since it’s auto-updating. Best bet? Create your ultimate boot disk with as many of the different utilities as your flash drive can hold Latest Features How-To Geek ETC How To Boot 10 Different Live CDs From 1 USB Flash Drive The 20 Best How-To Geek Linux Articles of 2010 The 50 Best How-To Geek Windows Articles of 2010 The 20 Best How-To Geek Explainer Topics for 2010 How to Disable Caps Lock Key in Windows 7 or Vista How to Use the Avira Rescue CD to Clean Your Infected PC Luigi Installs Any OS on Google’s Cr-48 Notebook DIY iPad Stylus Offers Pen-Based Interaction on the Cheap Serene Blue Ubuntu Wallpaper for Your Desktop Enjoy Old School Style Video Game Fun with Chicken Invaders Hide the Twitter “Litter” in Twitter’s Sidebar Area (Chrome and Iron) Public Domain Day: Reflections on Copyright and the Importance of Public Domain

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