Learn how to rescan disk in Linux after extending VMware disk. Our VMware Management Support team is here to help you with your questions and concerns.

How to Rescan disk in Linux after extending VMware disk

Re-scanning the disk after extending the VMware disk ensures that the new size is detected by the operating system. Furthermore, it allows complete use of the additional disk space as well.

We can easily rescan a disk in Linux after extending a VMware disk, with the following steps:

1. First, we have to check the name of the disk that we want to rescan. This is done by listing all the available block devices on the system with the lsblk command.
2. Now that we have identified the disk we plan on rescanning, we have to run the following code:

   $ echo 1 > /sys/class/scsi_disk/X\:Y\:Z\:*/device/rescan

   Here, X:Y:Z has to be replaced with the SCSI device ID of the disk to be rescanned.

   For instance, if the device ID is 0:0:0:0, the command would look like:

   $ echo 1 > /sys/class/scsi_disk/0\:0\:0\:0/device/rescan
3. Then, it is time to verify that the new size is reflected in the system with the lsblk command again. Alternatively, we can use other disk management tools like fdisk or parted to verify the disk size.

Our experts would like to point out that if the disk is being used as a physical volume in a volume group, we have to extend the physical volume and volume group before using the new space. This can be easily done with the pvresize and vgextend commands.

Let us know in the comments if you need further help with rescanning a disk after extending the VMware disk.

[Need assistance with a different issue? Our team is available 24/7.]

Conclusion

In summary, our Support Techs demonstrated how to rescan a disk in Linux after extending the VMware disk.