Virtualization Short Take #2
February 18th, 2008 by slowe
Before I begin the second installation of Virtualization Short Takes, I thought it was interesting to note that Thomas Bishop over at ScaleTheMind.com has adopted a similar strategy. There’s just so much happening that it’s truly impossible to discuss everything in depth. Even so, it’s often helpful to at least provide the readers with the links and some additional thoughts. It seems like this approach may be the best one to use. I’m certainly open to everyone’s thoughts.
So, on to today’s list of virtualization-related links:
- Frane Borozan has launched p2vbackup.com, a site that describes the process for incorporating virtualization into your backup and recovery process. I haven’t had the time to review the site fully yet, but what I’ve seen looks pretty good.
- Either Duncan Epping at Yellow Bricks just has really bad luck, or he has some sort of link into the VMware Knowledge Base so that he knows when new articles are published. If it’s the former, then his misfortune is our good fortune, as he’s pointed out a potential problem with Storage VMotion that can cause the storage migration to fail and the VM will then not power on. The associated VMware KB article is also available.
- Lou Springer has written a paper on estimating workload consolidation and placement without the use of VMware Capacity Planner. Truth be told, there are organizations that cannot, for whatever reason, leverage Capacity Planner. Lou’s document describes some alternative approaches and some ways of mitigating the risks of those alternative approaches.
- Again via Duncan, here’s some good information on recovering VMFS partitions when you’ve forgotten to set “automount disable” on the Windows-based VCB proxy server. It seems like I recall seeing somewhere that automount was disabled by default on the Standard edition of Windows Server 2003, but enabled on Enterprise. Can anyone confirm that? By the way, it looks like Windows Server 2008 will default to automount enabled.
- And while we’re talking about storage, check out this information from Duncan on Dell’s DRAC Virtual Media functionality and its interaction with VMware ESX Server. Anyone seen similar behavior from HP iLO?
- Via VMblog.com, I saw that Catbird had announced their HypervisorShield, which “is the first virtualized security technology that can monitor and control access to the hypervisor network”. OK, sounds nifty, but I have to side with Christofer Hoff on this one. What exactly is Catbird saying here? Are they protecting the Service Console network interface(s), the VMkernel interface(s), the vSwitches, or something else entirely? Personally, I’m going to wait until I can see more information to make a judgment call on this one.
That’s it for this edition. Feel free to submit any thoughts, suggestions, or rants in the comments below. Thanks for reading!
UPDATE: My recollection on the status of automount in Windows Server 2003 was incorrect. It is enabled by default in Standard, and disabled by default in Enterprise. Thanks to the readers to helped set me straight!
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February 18th, 2008 at 3:24 pm
I haven’t seen this happening with HP ILO Virtual Devices… But will be at a customer tomorrow who has brand new HP DL380’s and will see what happens if and when I enable this option.
And the Storage VMotion wasn’t bad luck, I just noticed the article in the Knowledge Base. I try to check it every once in a while to see if there is any handy new info there. Saves me time when troubleshooting and there’s some nice info there.
February 18th, 2008 at 3:38 pm
Duncan,
Let me know what happens with those DL380’s; I’d be curious to know.
I’m glad to hear that finding the Storage VMotion issue wasn’t bad luck. Is there an RSS feed or anything similar for the VMware KB? How do you go about checking for new material?
February 18th, 2008 at 3:49 pm
Scott:
I pinged Catbird’s CTO and he’s responded to my questions; I’ll post them shortly.
You may have more questions after that
/Hoff
February 18th, 2008 at 5:35 pm
Thanks, Chris! I look forward to the additional information.
February 19th, 2008 at 12:23 am
Scott: You are correct, sir!
The MountMgr service under Enterprise 2008 (as well as 2003) has a key for “NoAuoMount” (which is set to 1 by default, thus disabling automount).
See below:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MountMgr]
“NoAutoMount”=dword:00000001
Be aware that in 2008’s Virtual Disk Services (VDS) layer, there’s also a bunch of new code for API calls assoc’d w/ the VDS SAN policy (fairly close ties to this “NoAutoMount” registry key).
Anyhow…I recall this was established as the default setting (for Enterprise & Data Center editions) to prevent it from aggressively mounting volumes from SAN arrays, as well as a security measure for removable devices (USB thumb drives and such).
-Brian (http://www.NTAPgeek.com/)
February 19th, 2008 at 10:32 am
Scott,
to quote the Rocket, you “mis-remembered” the automount defaults. Automount is enabled in Windows 2003 Standard and disabled in Enterprise.
February 19th, 2008 at 10:46 am
Rich and Brian,
I appreciate the clarification and correction. I’ve updated the article accordingly. Thanks for reading!