Archive for June, 2011

Well its finally arrived, NetWorker 7.6 SP2 with support for VADP is now GA.

I’ve got a number of posts about this coming up, but for the moment, just a quick one to say it’s here, and to list some of the published features.

It’s fair to say that existing NetWorker customers have been waiting for VADP support for a considerable time now, so its great to finally see it arrive. However without putting a damper on things I would like to suggest customers do not rush off and upgrade without reading the release notes and considering there are still a number of open escalation’s in this build which are logged for issues with VADP.

VMware: vStorage API for Data Protection (VADP)

  • Integrated with vStorage API for Data Protection (VADP)
  • Change block tracking (CBT) support (file-based)
  • Single-step image-level backups & restores
  • Support for file level recovery from Windows VMs

 Flexible Single Step VM Recovery

  • To the original, new, or configure a new virtual machine
  • Recover the VM to the same/different vCenter, ESX Server, or ESX datastore

 NetWorker VADP proxy options

  • Physical or virtual servers
  • Windows Server 2008 R2, Windows Server 2008 or Windows Server 2003

DD Boost or Avamar Grid deduplication backups

  • DD Boost on VADP Proxy with Dedicated NetWorker Storage Node
  • Support for Global Encryption and Compression Directives for  NTFS image and file level backups
  • VMware VADP and In-Guest backups of the same UNIX/Linux based virtual machine

I’ve been working on a storage project over the last few months and I ran into a problem with MirrorView /S which turned out to be a bug in the CLARIION flare code. I thought id write a quick post about it incase anyone comes across the same problem.

The Problem :

The symptoms I saw were as follows;

  • Enabling the first mirror of a LUN per SP showed no issues, the LUN replicated and showed to be in a consistent state.
  • Enabling additional mirrors of LUNS on the same SP caused the initial mirror to re synchronize, (but would never complete).
  • Enabling  additional mirrors caused the hosts average read/write queue times to shoot through the roof causing huge performance problems.

The arrays I was working on were running flare version which needed to be upgraded to After the upgrade I initiated a sync on all mirrors and everything starting working as expected.