Archive for September, 2008

Tips: Add new disk online

Posted on September 25th, 2008 in Operating Systems, Storage, Tips | 4 Comments »

The following article will share how to add new hard disk into SuSE Linux Enterprise Server without reboot.

Follow these steps:

  • Create a new LUN and assign to the ESX Server Storage Group on SAN.
  • Rescan Storage Adaptors on ESX Server Virtual Infrastructure Console.
  • Add new Hard Disk into VM by Edit Setting.
  • Open VM Console(SSH will work as well).
  • Detect new disk command # rescan-scsi-bus.sh
  • Find new disk command # cat /proc/partitions
  • Create new partition on the disk command # fdisk /dev/sdx
  • Format new disk partition # mkfs.ext3 /dev/sdx1
  • Edit /etc/fstab to add in permanent mount point for new disk and partition.
  • Mount new disk # mount -a

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How to recover a VM hung in the ESX Farm

Posted on September 24th, 2008 in Virtualization | 4 Comments »

Today, I experience with a VM hung which is not able to be reset, power off or remove from the ESX farm in our production environment. During the troubleshooting, of course we start from the virtual center, which didn’t work. Follow by that, I start to using the vmware-cmd command to do a stop & stop hard, and it still do not work. At the same time, I also restarted the management service from ESX host. Once I had done that, the VM show poweroff, but in the esxtop, it will still show the VM are running. I try to register the vm to another host, and issue to power on, but it failed, due to the resources hold up by the ESX host for the specify problem VM.

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How to design Storage LUN for optimum perfomance

Posted on September 24th, 2008 in Storage, Tips | 2 Comments »

Previously Craig talked about Storage Planning – Virtualization, the following article will share about “How to design Storage LUNs for optimum performance” – stripe Single LUNs to MetaLUN.

The most important point to fasten up LUNs speed is increase the spindle count on your LUN. And this can be achieve by Meta up few Single LUNs.

If you have 3 RAID Groups with 7 + 1 RAID 5 Configuration (7 Disks join as a RAID 5 Group and 1 as Hot spare), and you create a 60GB Single LUN on Group 1, you have 7 spindles to run this LUN. But if you create 20GN Single LUNs on each of your RAID Groups and Meta Stripe them together to become a 60GB Meta LUN, you are having 3 X 7 = 21 Spindles to run this LUN (theoretically we should call this RAID as RAID 50).

The same setting can apply to RAID 10 LUNs too, it will then become RAID 100.
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How to Enable Virtual Machine Monitoring

Posted on September 24th, 2008 in Tips | 2 Comments »

Previously Craig posted about Monitoring features from ESX 3.5 update 2 and I would like to share How to Enable Virtual Machine Monitoring here.

  • Login to Virtual Center
  • Right click on your Cluster
  • Click Edit Settings
  • Click VMware HA
  • Click ‘Enable virtual machine monitoring

VMware Virtual Monitoring

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VMware Says Another Executive Is Stepping Down

Posted on September 22nd, 2008 in Announcement, Industry News | 2 Comments »

VMware said Friday a senior executive in charge of product development at the software maker, is leaving, the latest in a recent string of executive departures there.

Spokeswoman Mary Ann Gallo said that Vice President of Product Development Paul Chan resigned in August, after seven years with the company, and will leave Oct. 3.

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