HayesJupe's Blog

May 27, 2014

XP/2003 clients cannot run logon scripts from 2012 R2 U1 servers

Filed under: Windows Server — hayesjupe @ 8:13 am

Recently we had a client who diligently updated their 2012 R2 DC’s to U1 as part of their normal patching cycle – and found afterwards that their 2003 servers were experiencing some “odd” behaviour.

After having a look, sure enough, networking was fine, RPC was fine, all services were fine, but when trying to connect to \netlogon, the error: “The specified network name is no longer available” was thrown.

A short amount of searching later, turned up this article:
http://workinghardinit.wordpress.com/2014/04/25/windows-xp-clients-cannot-execute-logon-scripts-against-a-windows-server-2012-r2-domain-controller-workaround/

Our experience of the issue was slightly different – in that it did not occur when the 2012 R2 DC’s were first upgraded, only when U1 was applied, in addition, the 2003 clients could connect to the file server which was running 2012 R2 (not u1) without any issues, but had trouble to any file shares on 2012 R2 u1 servers. It is also worth noting that all of these servers had been upgraded from 2008 R2/2012 – none were fresh builds.

The registry change documented in the article worked and all was good with the world. In this instance, the client only had a small number of servers still running 2003 – and this has given them a bit of a hurry up to sort out the apps on these servers.

September 11, 2013

Win 2012 R2 and 8.1 RTM now on Technet downloads

Filed under: Windows Server — hayesjupe @ 8:26 am

well, it was there yesterday… but you get the idea.

June 4, 2013

HyperV in 2012 R2

Filed under: System Centre,Windows Server — hayesjupe @ 6:42 pm

Link to Bink article… – http://www.bink.nu/what’s-new-for-hyper-v-in-windows-sever-2012-r2

Some of the stuff in there looks pretty cool….  hopefully the release of VMM2012 R2 will follow this a bit quicker than it did for 2012 Hyper-V.

December 28, 2012

Windows 2012 deduplication – turning it off (completely) and recovering your space!

Filed under: Windows Server — hayesjupe @ 11:25 am

A while back i wrote a post about data deduplication in 2012…. generally a very good feature, but as that specific post talked about, there was a collection of .iso and compressed data where not only did dedup not save me anything, it actually used up more space in the dedup folder than the orginal data size (which i found a little odd)

Today i got around to doing something about this and found

  • Disabling data deduplication (via GUI or powershell) only stops further deduplication from occuring – but data that has already been deduplicated will remain deduplicated
  • In order to “move” (re-hydrate ?) the data back to the original files and out of the deduplication store, use the powershell command start-dedupjob -Volume <VolumeLetter> -Type Unoptimization
  • You can check the status on where this is at by using get-dedupjob, or, i like using TreeSize which shows the size on disk of specific files…. including the deduplication chunks
  • At this stage – i noticed the original files getting bigger, but the dedup store (and the chunks within it) have not decreased at all…. “maybe theres another command for this ?” i thought….
  • There were two additional job types available, “garbageCollection” and “scrubbing”.  Unfortunately the powershell help nor the technet documentation actually state what either of these do! After a bit of searching, i found this page http://www.infotechguyz.com/WindowsServer2012/DedupandWindowsServer2012.html which specifies that GarbageCollection will find and remove unreferenced chunks and scrubbing will perform an integrity check…. so with this knowledge i then ran
  • start-dedupjob -Volume <VolumeLetter> -Type GarbageCollection only to find that this command can only be run when dedup is enabled!
  • In order to get around this, i re-enabled dedup, but excluded all folders on the drive, i also removed all the schedules/background optimisation settings…. then re-ran the command
  • Ininitally the size of the dedup folder increased by approx 100mb (keep in mind the dedup folder a thtis stage was 2.2TB), but soon the get-dedupjob status seemed to stop at 50% and the size of the dedup folder started coming down, quite quickly in 1GB chunks (the chunks seem to be a max of 1GB)
  • Once this completed (it took a while) – i disabled dedup again and all was good

Just to be clear, 2012 deduplication is still a good technology – and i use it elsewhere with great results – just every now and again, you will run into a dataset which it just does not agree with…. and disbaling it completely just isn’t intuitive…. (and yes, all this probably could have been avoided by running the dedup estimator tool – but then i wouldnt have learnt stuff – so theres no fun in that!) hence why I thought it would write the above…. hope it helps someone.

October 25, 2012

2012 deduplication savings

Filed under: Windows Server — hayesjupe @ 6:29 am

So now that 2012 has been out for a while… im starting to see a bit more detail on certains features… in this case file de-duplication.

I applied file deduplication to a drive we use called our “SOE” drive, which contains all the MS products, pre-prepared packages for SCCM, VHD (and vhdx) libraries etc…. a reported dedup hit rate of 42%, but on the folder, showing 8.5GB on disk out of 357GB in the folder – quite impressive…. but also not 42%, so where’s the gap?

So, when i ran out of NAS space, i purchased a stand-alone 3TB drive in a server – for storage of “less important” data, that has already been compressed using a combination of 7zip and rar…

As deduplication doesnt work on compressed files, i started decompressing – to see which is better, compression or deduplication. (I realise this depends on file types etc, but this data was a mix of iso’s, documents, executables etc)

I had used approx 2.2TB out of 2.72TB available while the files were compressed.

Once many of the folders were decompressed, i was, according to the properties of the folder, storing 2.16TB of data and only using 151mb on disk….. thats quite impressive, but the properties of the disk told a different story – 7oGB free….

so where has all the space gone?

Utilising one of my favourite tools – treesize by jam software, i had a quick look…. under “System volume information\DeDup” there was now 2.6TB of data… thats right, the dedup folder was larger than the original data itself!

Going back to my SOE drive, i discovered the deup folder was 208GB…. so my real “saving” on the SOE drive was only around the 148GB mark, not the 340-ish Gb the folder properties showed – still a good saving – but unfortunately no where near what that interface claims… but in line with the 42% presented within server manager.

Anyhoo – to sum up….. in order to see the real savings file dedup is providing, have a look in server manager, or have a look at your  “System volume information\DeDup” folder on the volume… and understand that for some volumes (depending on file type), there might not only be no savings, but it may increase your disk usage.

Dedup is something that is cool to get “for free” (i imagine most people reading this blog will have EA’s with software assurance) and will be quite useful in a number of situations…. but, as usual, the Microsoft sales machine is making it sound like the coolest thing that has ever happened (and claiming ludicrous savings – http://blogs.technet.com/b/filecab/archive/2012/05/21/introduction-to-data-deduplication-in-windows-server-2012.aspx)- so in the words of public enemy, don’t believe the hype.

August 16, 2012

Win 8 RTM available on technet downloads

Filed under: Windows Server — hayesjupe @ 5:25 am

Title says it all really…. no sign of win server 2012 as yet – but assume it will also be up “soon”….

August 2, 2012

August 15th – Win 2012 and Win 8 available for DL

Filed under: Active Directory,Exchange,Lync,System Centre,Windows Server — hayesjupe @ 8:48 pm

http://www.bink.nu/windows-8-has-reached-the-rtm-milestone

I’ve made the (fair) assumption that server will become available at the same time as the client.

Im not convinced that many people (in the corporate space) actually care about Win 8…. part of that is because Win7 is a bloody good OS…. if Win-7-to-go existed… i think there would be even less interest in Win 8.

Server 2012 is a bit of a different matter…. while many features are a bit ho-hum, Hyper-V replica’s… there is some big cash savings to be made by swapping from VMWare and SRM… so will be interesting to see how that plays out.

Oh – and the rest of the Wave 15 products that have previews – Exchange, Lync and office 2013… well, im also quite “meh” about them too…. dont get me wrong – its not as if they are terrible – but there is just nothing particuarly exciting about any of them.

The exchange 2013 web management interface, after a few days of using it, i no longer dislike…. i fucking hate it…. moving to that after using the very good exchange 2010 management console is a huge step backwards…. i can only assume the manager that made that decision had smoked something or was busy crapping on about how great “the cloud” was to some sales idiot… or both.

With Lync, its cool to have the web client back – outside of that, while there are improvements, im a bit meh….. annoyed at the lack of authenticated sip trunk – still.

Office…. well, its office… i can imagine its hard for those guys to come up with anything new… it would be nice if they worked with the exchange team to achieve true, no impact exchange failovers… (which they well may have, but im not setting up test DAG’s and CAS arrays to find out until RTM)

On the up side, the more i use SCCM 2012 – the more it rocks. Sure, there are still improvements that could be made….. but holy shit it has come a long way since 2007, its so much more usable, responsive and quick compared to 2007. Now theres a team that got their shit together – well done.

July 12, 2012

Win Server 2012 and Win 8 – 1st week of augfor RTM

Filed under: Windows Server — hayesjupe @ 6:04 am

Windows 8 im a bit meh about – but server 2012…. thats a bit more exciting.

http://blogs.technet.com/b/windowsserver/archive/2012/07/09/windows-server-2012-final-release-timing.aspx

October 6, 2011

SMB 2.2 – now that sounds cool…

Filed under: Windows Server — hayesjupe @ 7:22 pm

http://blogs.technet.com/b/server-cloud/archive/2011/09/20/storage-and-continuous-availability-enhancements-in-windows-server-8.aspx

Quite frankly, that sounds like some cool shit… as always, devil will be in the detail – which Microsoft always tends to gloss over…. but it still sounds cool! We’ll wait and see how cool it actually is when we hit beta/RC.

September 30, 2011

Not much going on….

Filed under: Games,Windows Server — hayesjupe @ 8:22 am

Its been almost a month since my last post…. there’s simply been not much to post about…

I got my wisdom teeth out, tonsils out and played through fallout 3 again – still one of the best games ever made.

This however – http://www.shacknews.com/article/70367/syndicate-fps-reboot-deploys-february-2012 did get my interested – in a gaming way…. Syndicate & Syndicate wars – the good old days of gaming!

Hasnt really been much going in the world of technology, still working lots… but quite frankly, nothing thats been too exciting…. pretty much waiting on SCCM 2012, Windows 8 (and Win8 server in particular), Lync 2010 SP1, Exchange 2010 SP2 etc….

For clients still on Win XP – its really time to move your arse up to Win7… or get us in to help with said arse moving 🙂

June 10, 2011

HyperV and TCP offload

Filed under: Windows Server — hayesjupe @ 8:28 am

I have had issues before with Dell servers and RSS Scaling with hyper-V, so that setting now just gets disabled by default on all broadcom’s that we run into – but i started having a problem with packet loss on some other servers a few weeks ago… first up i assumed it was not with the hyper-V server, but with the clients net connection.

Now we were talking 1% packetloss over large samples…. so a 100 pings might only show 1 or 2 packets being lost… but 1000000 pings would show 1% on average.

After alot of investigation – sure enough, the problem was with the Hyper-V nic’s themselves….  on the hosts, i disabled all TCP and UDP offloading – and things got substantially better… although i still had a little bit of packet loss here and there…. disabling TCP/UDP offloading within the guest OS seemed to fix this as-well.

I’ll be turning off all network-stack offloading on all my hyperV hosts from here on in 🙂

August 25, 2009

Windows server compatibility

Filed under: Windows Server — hayesjupe @ 1:25 am
Tags: ,

Windows Server 2008 R2 has been RTM for a couple of weeks now – and more information is starting to flow about this new OS. Like many people, i have started upgrading our internal servers, and found it to be a easy process – however there are quite a few major server apps that either do not work with R2, or have not been certified as supported as yet – and finding information on this isnt easy.

Below is a table of the current status of many popular server applications and what platforms they are supported on. Please note that over the coming weeks, some of these status’s will change as existing products are certified or patched to work with R2.

  ISA 2006 SP1 Exch 2003 SP2 Exch 2007 SP1 Exch 2010 SCCM 2007 SP1 OCS 2007 OCS 2007 R2 APPV 4.5 APPV 4.6 WSUS 3.0 SP1 WSUS 3.0 SP2 SQL 2005 SP3 SQL 2008 SP1 SCOM 2007 SP1 SCOM 2007 R2
Win 2003 SP2 Yes Yes No No* Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes
Win 2003 SP2 x64 No No Yes No* Yes No Yes No Yes Yes Yes Yes Yes Yes Yes
Win 2003 R2 SP2 Yes Yes No No* Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes
Win 2003 R2 SP2 x64 No No Yes No* Yes No Yes No Yes Yes Yes Yes Yes Yes Yes
Win 2008 RTM No No No No* Yes No No Yes Yes Yes Yes Yes Yes Yes Yes
Win 2008 RTM x64 No No Yes No* Yes No Yes No Yes Yes Yes Yes Yes Yes Yes
Win 2008 SP2 No No No No* Yes No No Yes Yes Yes Yes Yes Yes Yes Yes
Win 2008 SP2 x64 No No Yes Yes* Yes No Yes No Yes Yes Yes Yes Yes Yes Yes
Win 2008 R2 x64 No No No Yes* No No No No ? No Yes ? ? No No
Virtualised Yes No Yes Yes* Yes No No Yes Yes Yes Yes Yes Yes Yes Yes

Exchange 2010 entries are purely speculation – however it is fair to assume that exchange 2010 will continue to be x64 only, and support R2 as the release candidate does (http://msexchangeteam.com/archive/2009/08/17/451974.aspx)

SCCM 2007 will support R2 as of SP2 (http://blogs.technet.com/systemcenter/archive/2009/08/05/configuration-manager-2007-service-pack-2.aspx)

In order to keep up with the latest in supported configurations, you can check

Virtualisation Support – http://support.microsoft.com/kb/957006

ISA 2006 System Requirements – http://technet.microsoft.com/en-us/library/cc304520.aspx

SQL products virtualisation support – http://support.microsoft.com/?id=956893

SCOM Supported Configurations – http://technet.microsoft.com/en-us/library/bb309428.aspx

Windows 2008 supported server applications – http://support.microsoft.com/kb/948680

Create a free website or blog at WordPress.com.