Monday, July 07, 2014

mounting cdrom images on XenServer 6.2

mount /dev/xvdd /mnt

Thursday, May 29, 2014

Convert XEN images on SLES 11 to vmdk format used by XenServer 6.2

On the SLES 11 XEN host, go to: /var/lib/xen/images and find the disk images in raw format. Then use qemu-img to convert the raw images. e.g.: qemu-img convert -f raw -O vmdk disk0-clone.raw disk0-clone.vmdk The conversion took ~30min for a 100G disk image on Liszt. I used samba on Liszt, and then created a SR on XenServer to access the disk images. XenServer then retrieved the vmdk thru CIFS import.

Monday, April 15, 2013

Workstations in B301 unable to retrieve IP from DHCP server

Workstations in B301 connect to the plugins underneath the floor with Cat 5 cables.  The 3Com 4400 in the room is dead and is now replaced with a H3C 5120, which runs at 1Gbps.  The Cat 5 cables render the network incapable of running @ 1Gbps, even though the signal lights on the H3C are all green.  Only part of the workstations can retrieve their IPs from the DHCP server.

When the Cat 5's are replaced with Cat 6's, workstations can run normally @ 1Gbps.

Solution:  To prevent the hassle of replacing all the Cat 5's, all ports on H3C are configured to run @ 100Kbps using the following commands:

> sys
> int gig 1/0/n
> speed 100

Tuesday, March 26, 2013

Squid caching problem, very slow response

Problem: Recently, Vivaldi produces extremely responses. Fix: add dns_nameservers directive to squid.conf

Wednesday, March 20, 2013

Youtube caching with Squid and Nginx

Monday, March 18, 2013

user moved to a new container, login to gw failed

Problem: Moved a user object (previous associated to a GW mailbox). User was then unable to login. Symptom: Moving of a user object disassociates the link between the user GW object and the user eDir object. The GW user object still points to the user object which no longer exists in the previous container object. Fix: - login to consoleOne - Browse "GroupWise System" - right-click on the user GW object > GroupWise Utilities > GW/eDirectory Association > Associate Object... - Click OK at the Identity Manager driver for GW prompt - check: "Select existing eDirectory Object", then choose the user eDir object. - go to the server, run ndsrepair

Tuesday, February 26, 2013

Unable to manage OES2 storage pool with iManager

When trying to manage OES2 storage pool with iManager, once server object (this case, brahms) was selected, CIMOM Error: This user does not have the correct credentials

- enter: id administrator, no such user

- LUM enable the user adminstrator, the user has to be able to LUM on the designated server and add UNIX-config object
- rcowcimomd restart