UFS will not be recognized and mounted on GNU/Linux or Windows automatically. Open a console window; In the console, type. UFS Explorer (Shareware) from SysDevSoftware (Windows XP or higher, GNU/Linux. Update UTF-8 Webdesign Windows Wordpress Photo Networkdrive Network Serial.
-->You can't connect to an Azure Linux Virtual Machine (VM) by using a Secure Shell (SSH) connection. When you run the Boot Diagnostics feature on the Azure portal, you see log entries that resemble the following examples:
Examples
The following are examples of possible errors.
Example 1: A disk is mounted by the SCSI ID instead of the universally unique identifier (UUID)
Example 2: An unattached device is missing on CentOS
Example 3: A VM cannot start because of an fstab misconfiguration or because the disk is no longer attached
Example 4: A serial log entry shows an incorrect UUID
This problem may occur if the file systems table (fstab) syntax is incorrect or if a required data disk that is mapped to an entry in the '/etc/fstab' file is not attached to the VM.
Resolution
To resolve this problem, start the VM in emergency mode by using the serial console for Azure Virtual Machines. Then use the tool to repair the file system. If the serial console isn't enabled on your VM, go to the Repair the VM offline section.
Use the serial console
- Connect to the serial console.
- Sign-in to the system by using a local user and password.NoteYou can't use an SSH key to sign in to the system in the serial console.
- Look for the error that indicates that the disk wasn't mounted. In the following example, the system was trying to attach a disk that was no longer present:
- Connect to the VM by using the root password (Red Hat-based VMs).
- Use your favorite text editor to open the fstab file. After the disk is mounted, run the following command for Nano:
- Review the listed file systems. Each line in the fstab file indicates a file system that is mounted when the VM starts. For more information about the syntax of the fstab file, run the man fstab command. To troubleshoot a start failure, review each line to make sure that it's correct in both structure and content.Note
- Fields on each line are separated by tabs or spaces. Blank lines are ignored. Lines that have a number sign (#) as the first character are comments. Commented lines can remain in the fstab file, but they won't be processed. We recommend that you comment fstab lines that you're unsure about instead of removing the lines.
- For the VM to recover and start, the file system partitions should be the only required partitions. The VM may experience application errors about additional commented partitions. However, the VM should start without the additional partitions. You can later uncomment any commented lines.
- We recommend that you mount data disks on Azure VMs by using the UUID of the file system partition. For example, run the following command:
/dev/sdc1: LABEL='cloudimg-rootfs' UUID='<UUID>' TYPE='ext4' PARTUUID='<PartUUID>'
- To determine the UUID of the file system, run the blkid command. For more information about the syntax, run the man blkid command.
- The nofail option helps make sure that the VM starts even if the file system is corrupted or the file system doesn't exist at startup. We recommend that you use the nofail option in the fstab file to enable startup to continue after errors occur in partitions that are not required for the VM to start.
- Change or comment out any incorrect or unnecessary lines in the fstab file to enable the VM to start correctly.
- Save the changes to the fstab file.
- Restart the virtual machine.
- If the entries comment or fix was successful, the system should reach a bash prompt in the portal. Check whether you can connect to the VM.
- Check your mount points when you test any fstab change by running the mount –a command. If there are no errors, your mount points should be good.
Repair the VM offline
- Attach the system disk of the VM as a data disk to a recovery VM (any working Linux VM). To do this, you can use CLI commands or you can automate setting up the recovery VM using the VM repair commands.
- After you mount the system disk as a data disk on the recovery VM, back up the fstab file before you make changes, and then follow the next steps to correct the fstab file.
- Look for the error that indicates the disk wasn't mounted. In the following example, the system was trying to attach a disk that was no longer present:
- Connect to the VM by using the root password (Red Hat-based VMs).
- Use your favorite text editor to open the fstab file. After the disk is mounted, run the following command for Nano. Make sure that you're working on the fstab file that is located on the mounted disk and not the fstab file that's on the rescue VM.
- Review the listed file systems. Each line in the fstab file indicates a file system that is mounted when the VM starts. For more information about the syntax of the fstab file, run the man fstab command. To troubleshoot a start failure, review each line to make sure that it's correct in both structure and content.Note
- Fields on each line are separated by tabs or spaces. Blank lines are ignored. Lines that have a number sign (#) as the first character are comments. Commented lines can remain in the fstab file, but they won't be processed. We recommend that you comment fstab lines that you're unsure about instead of removing the lines.
- For the VM to recover and start, the file system partitions should be the only required partitions. The VM may experience application errors about additional commented partitions. However, the VM should start without the additional partitions. You can later uncomment any commented lines.
- We recommend that you mount data disks on Azure VMs by using the UUID of the file system partition. For example, run the following command:
/dev/sdc1: LABEL='cloudimg-rootfs' UUID='<UUID>' TYPE='ext4' PARTUUID='<PartUUID>'
- To determine the UUID of the file system, run the blkid command. For more information about the syntax, run the man blkid command. Notice that the disk that you want to recover is now mounted on a new VM. Although the UUIDs should be consistent, the device partition IDs (for example, '/dev/sda1') are different on this VM. The file system partitions of the original failing VM that are located on a non-system VHD are not available to the recovery VM using CLI commands.
- The nofail option helps make sure that the VM starts even if the file system is corrupted or the file system doesn't exist at startup. We recommend that you use the nofail option in the fstab file to enable startup to continue after errors occur in partitions that are not required for the VM to start.
- Change or comment out any incorrect or unnecessary lines in the fstab file to enable the VM to start correctly.
- Save the changes to the fstab file.
- Restart the virtual machine or rebuild the original VM.
- If the entries comment or fix was successful, the system should reach a bash prompt in the portal. Check whether you can connect to the VM.
- Check your mount points when you test any fstab change by running the mount –a command. If there are no errors, your mount points should be good.
- Unmount and detach the original virtual hard disk, and then create a VM from the original system disk. To do this, you can use CLI commands or the VM repair commands if you used them to create the recovery VM.
- After you create the VM again and you can connect to it through SSH, take the following actions:
- Review any of the fstab lines that were changed or commented out during the recovery.
- Make sure that you're using UUID and the nofail option appropriately.
- Test any fstab changes before you restart the VM. To do this, use the following command:
$ sudo mount -a
- Create an additional copy of the corrected fstab file for use in future recovery scenarios.
Next steps
UFS Explorer Professional is fast and comprehensive data recovery and undelete program for FAT/NTFS/HFS/HFS+/UFS/UFS2/ReiserFS/Ext2/Ext3 file systems with broken RAID arrays recovery support.
With UFS Explorer Professional you may:
- Recover files from most used file systems of different OS: UFS/UFS2 (BSD), ReiserFS/Ext2/Ext3 (Linux), HFS/HFS+/HFSx (MacOS), FAT and NTFS with system locked files access;
- Back up partitions or entire disks for further analysis and data recovery;
- Undelete deleted files on FAT and NTFS file systems that were deleted from or without Recycle bin;
- Find and recover data from partitions, that were lost due to faults in disk re-partitioning, hardware failures, virus attacks and so on;
- Make heuristic data analysis to recover deleted or lost data from behind existing partitions or unpartitioned disk space;
- Virtually reconstruct broken or disassembled RAID arrays (RAID 0, JBOD and their combinations) and recover data from there;
- Access data on virtual disks of leading virtualiztion software.
UFS Explorer Professional supports access to physical disks, USB mass storage devices (including some digital cameras, MP3 players etc.) and set of virtual disks: Parallels Workstation, VMWare products, MS Virtual PC, MacOS .DMG (both raw and 'chunked' with ZLIB compression), plain RAW disks image files as well, as disk images in its own, solid-compressed format.
It auto recognizes different styles of disk partitioning, including basic and dinamic disks, BSD slices, MacOS partition map and no partitoning at all.
UFS Explorer product supports Unicode file names on all supported file systems.
See:
site for details.
With UFS Explorer Professional you may:
- Recover files from most used file systems of different OS: UFS/UFS2 (BSD), ReiserFS/Ext2/Ext3 (Linux), HFS/HFS+/HFSx (MacOS), FAT and NTFS with system locked files access;
- Back up partitions or entire disks for further analysis and data recovery;
- Undelete deleted files on FAT and NTFS file systems that were deleted from or without Recycle bin;
- Find and recover data from partitions, that were lost due to faults in disk re-partitioning, hardware failures, virus attacks and so on;
- Make heuristic data analysis to recover deleted or lost data from behind existing partitions or unpartitioned disk space;
- Virtually reconstruct broken or disassembled RAID arrays (RAID 0, JBOD and their combinations) and recover data from there;
- Access data on virtual disks of leading virtualiztion software.
UFS Explorer Professional supports access to physical disks, USB mass storage devices (including some digital cameras, MP3 players etc.) and set of virtual disks: Parallels Workstation, VMWare products, MS Virtual PC, MacOS .DMG (both raw and 'chunked' with ZLIB compression), plain RAW disks image files as well, as disk images in its own, solid-compressed format.
It auto recognizes different styles of disk partitioning, including basic and dinamic disks, BSD slices, MacOS partition map and no partitoning at all.
UFS Explorer product supports Unicode file names on all supported file systems.
See:
site for details.
Free download from Shareware Connection - UFS Explorer Professional is fast and comprehensive data recovery and undelete program for FAT/NTFS/HFS/HFS+/UFS/UFS2/ReiserFS/Ext2/Ext3 file systems with broken RAID arrays recovery support.
Publisher:SysDevSoftware Ltd. | License: Shareware | Price: 39.95
Version: 3.0 | Size: 854 KB | Platform: Win2000, Windows Server, WinOther
Released Date: 20-11-2006 | Rating: 0 | Title: UFS Explorer Professional
Author Url: http://www.sysdevsoftware.com
Program Info Url: http://www.ufsexplorer.com/
Download Url: http://www.ufsexplorer.com/download/ufsexplorer.pro.exe
Screenshot Url: http://www.ufsexplorer.com/img/ufsexplorer.jpg
Version: 3.0 | Size: 854 KB | Platform: Win2000, Windows Server, WinOther
Released Date: 20-11-2006 | Rating: 0 | Title: UFS Explorer Professional
Author Url: http://www.sysdevsoftware.com
Program Info Url: http://www.ufsexplorer.com/
Download Url: http://www.ufsexplorer.com/download/ufsexplorer.pro.exe
Screenshot Url: http://www.ufsexplorer.com/img/ufsexplorer.jpg
More downloads from UFS Explorer Professional publisher SysDevSoftware Ltd.:
UFS Explorer - With UFS Explorer you may browse most used file systems and extract files from there. Now it supports HFS+/UFS/ReiserFS/Ext2/Ext3 and also FAT and NTFS. Browse physical disks and disk image files, including virtual disks.
UFS Explorer Standard - With UFS Explorer Standard you may recover files from most used file systems of different OS: HFS/HFS+/UFS/UFS2/ReiserFS/Ext2/Ext3/FAT/NTFS with system locked files access.
Wider Desktop - This application is designed to make your desktop wider by adding much virtual free space for your windows. Want you, for example, easy compare two or more documents opened by looking both? Simply open them in your new virtual desktop space!
UFS Explorer Business Network - Recovery files over corporate network from distant employee's workstations.
hfs+, hfsx, ufs, ufs2, reiserfs, ext2, ext3, linux, windows
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Shareware Connection periodically updates pricing and software information of 'UFS Explorer Professional' from company source 'SysDevSoftware Ltd.' , so some information may be slightly out-of-date. You should confirm all information before relying on it. Software piracy is theft, Using 'UFS Explorer Professional' crack, password, serial numbers, registration codes, key generators is illegal and prevent future development of UFS Explorer Professional.
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