Some of you might have recognized that it has been surprisingly quiet on my blog in the last couple of weeks. The reason for this was not that I have not been keen for blogging - rather I was working on something bigger that I'd love to present you today. 🙂

It is nothing less than a book about VMware vSphere named …

After a couple of months or years plenty of storage is wasted on Windows systems and sometime it is not possible anymore to free space by using the well-known procedures. Recently I had this issue on a 5 year old system - the following steps did not help anymore:

• Executuing the Disk Cleanup utility
• Manual cleaning …

Recently I stumbled upon the following error message while creating a DRBD volume on CentOS 7:

1# drbdadm create-md r0
2initializing activity log
3NOT initializing bitmap
4Writing meta data...
5lk_bdev_save(/var/lib/drbd/drbd-minor-0.lkbd) failed: No such file or directory
6New drbd meta data block successfully created …

While configuring kdump on a system I recently stumbled upon the following error:

1Please reserve memory by passing "crashkernel=X@Y" parameter to the kernel

However, the parameter crashkernel was mentioned in the GRUB configuration file and kernel commandline:

1$ grep crashkernel /proc/cmdline
2ro …