Choose the Select Volume option and then select the.In the Block Volume Compartment drop-down list, select.Need to connect to the volume, see Connecting to a Volume for If you select iSCSI as the volume attachment type, you That you select this attachment type for this procedure. If ParavirtualizedĪttachments are available for this instance, we recommend Under Resources, click Attached Block Volumes.Click the instance that you want to attach a volume to.Open the navigation menu and click Compute.Attach the boot volume to the second instance as a data volume.Run the lsblk command and make note of the drives that are currently on the instance, for example: lsblk After you have confirmed that the instance is functional, perform the following steps. For steps to access the instance, see Connecting to a Linux Instance. Once you have the second instance, make sure you can log into the instance and that it is functional before proceeding with the recovery steps. If no existing instance is available, create a new Linux instance using the steps described in Creating an Instance. The second instance must be in the same availability domain and region as the boot volume's instance. You should only attach boot volumes for Linux-based instances to other Linux-based instances. Detach the boot volume from the instance.Īttaching the Boot Volume as a Data Volume to a Second Instanceįor the second instance, we recommend that you use an instance running an operating system that most closely matches the operating system for the boot volume's instance.If you have detected that your instance's boot volume is corrupted, you need to detach the boot volume from the instance before you can begin troubleshooting and recovery steps. To troubleshoot and recover the corrupted boot volume, you need to detach the boot volume from the instance and then attach the boot volume to a second instance as a data volume. If you don't see the ones described here, consult the documentation for your operating system for additional troubleshooting information. The error messages and system behavior described here are the most commonly seen for boot volume corruption, however depending on the operating system, you may see different error messages and system behavior. cloud-init: OSError: Read-only file system: '/var/lib/cloud/data' See 'systemctl status rvice' for details.
CHECK FOR CORRUPTED FILES LINUX SERIAL
On an instance with paravirtualized-attached boot volumes, the system may continue the boot process, but will be in a degraded state because nothing can be written to the boot drive.The serial console may display error messages similar to the following: Failed to start Create Volatile Files and Directories. Touch: cannot touch `/var/lock/subsys/iscsi': Read-only file system Touch: cannot touch `/var/lock/subsys/iscsid': Read-only file system Iscsiadm: Could not lock discovery DB: /var/lock/iscsi/lock.write: Read-only file system The serial console may display a message similar to the following: iscsiadm: Maybe you are not root? This will typically prevent instances from continuing to boot. On an instance with iSCSI-attached boot volumes, the iscsiadm service will fail to attach a volume because the volume is in read-only mode. Most operating systems will set the boot volume to read-only as soon as disk corruption is detected to prevent writes from further corrupting the volume, so look for messages that indicate the boot volume is in read-only mode. Monitor the messages that appear as the system is starting up. Once the reboot process starts, switch back to the terminal window, and you should see system messages from the instance start to appear in the window.
CHECK FOR CORRUPTED FILES LINUX HOW TO
Независимо от того, какие резервные копии вы сделали, это ваш лучший шанс.Tip If you have already confirmed your instance's boot volume is corrupted or if you are using an imported custom image, proceed to the Recovering the Boot Volume section, which describes how to use a second instance along with standard file system tools to both detect and repair boot volume corruption.
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