Netapp tips : Disk firmware upgrade
After a Netapp failed disk swap, if an autosupport message is sent saying that the disk firmware is downrev, please run the following command.filer1> disk_fw_updateMake sure that the disk firmware…
After a Netapp failed disk swap, if an autosupport message is sent saying that the disk firmware is downrev, please run the following command.filer1> disk_fw_updateMake sure that the disk firmware…
Details on howto setup Xen on WiFi network : http://wiki.xensource.com/xenwiki/XenWifi . Good one.
Xen lets you create guest operating systems (*nix operating systems like Linux and FreeBSD), so called "virtual machines" or domUs, under a host operating system (dom0). Using Xen you can…
To check what files are being used by a process, you can use lsof with option -p.Example: # lsof -p 2791COMMAND PID USER FD TYPE DEVICE SIZE NODE NAMEsyslogd 2791…
Xen Daemons For the Xen server to function properly, the below daemons must be running on the VM server. xend : This is the Xen server control daemon. This daemon…
Here are some xm and virsh commands for creating, managing, and troubleshooting xen virtual machines.Staring and Stopping VMs xm create - Create a domain based on config filexm destroy -…
A basic-but-common grep usage error involves pipe'ing the output of cat to grep to search the contents of a single file. This is absolutely unnecessary and a waste of time,…
/usr/sbin/smartctl - controls the Self-Monitoring, Analysis and Reporting Technology (SMART) system built into many ATA-3 and later ATA, IDE and SCSI-3 hard drives. The purpose of SMART is to monitor…
To run fully virtualized guests, host CPU support is needed. This is typically referred to as Intel VT, or AMD-V. To check for Intel VT support look for the 'vmx'…
If the machine supports para virtual guests, then you should see a "pae" flag in /proc/info. This means - the machine has PAE support and can run para virtual guests.#…
Command: storage show disk –a (or) vol status –r Filer> storage show disk –a Disk: 2b.18Shelf: 1Bay: 2Serial: XYZASDFVendor: NETAPPModel: X266_MTOMC320PADRev: R5VVRPM: 5400WWN: x:200:xxxx:1817d2 Filer> vol status -r RAID Disk Device HA …
This command displays the latency details of each NFS call and its histogram. Zero the counter with –z option before you start debugging. You should be in advanced privilege to…
A very good article on Unix Load averages and how it is calculated . Worth reading for every sysadmin and performance engineers.
In project management tools, now there is an alternative to MS Project. OpenProj is a new open source solution for project management. It’s simple user interface is very similar to…
lguest - A simple and tiny virtualization solution for x86. URL : http://lguest.ozlabs.org/