Linux tar: /dev/st0: Cannot write: Invalid argument error and solution

Posted on in Categories , , , , , , , , last updated May 29, 2008

Q. When I run tar command it fails with an error that read as follows:

tar: /dev/st0: Cannot write: Invalid argument

How do I fix this error under CentOS / Debian / Fedora / RHEL Linux HP server systems?
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Linux Kernel panic VFS Unable to mount root fs and solution

Posted on in Categories , last updated March 13, 2008

Q. I am using Linux on HP server and I am getting error that read as follows:
Linux Kernel panic: VFS: Unable to mount root fs

How do I solve this problem?

A. Most modern distributions including Debian uses loadable kernel module for ext3 file system. So to read ext3/ext2 file system kernel must load ext3 kernel module (ext3.ko).

This module is included in an initrd image. If an initrd image is missing or that image does not include suitable kernel modules to access the ext3 filesystem on the partition, an error message (Linux Kernel panic: VFS: Unable to mount root fs) will be displayed to you.

To solve this problem you need to use mkinitrd script that constructs a directory structure that can serve as an initrd root file system.

The instructions for creating initrd images are here on our site.