Clearing up some confusion about the WHS corruption issue

I was just mentioning to someone via email this morning that my understanding of the WHS corruption issue was that it only affects files that you edited live from the server (that is, the files you're editing in the affected application are sitting on the server at the time of editing). If that was the case, and I thought it was, then I was OK: I just use the WHS for backup and edit things locally. Ed Bott explains why this is indeed the case:

I asked a senior member of the Windows Home Server team for more details yesterday. Here’s what I learned:

This is not an issue that affects every Windows Home Server installation, and the symptoms require several factors that are not mentioned in the KB article. The largest contributing factor is when a home server is under extreme load. If you’re doing a large, highly demanding file copy operation in the background and you’re using one of the listed applications to edit a file that’s stored on a shared folder on the home server, and you save the edited file to the server, then you might see this bug.

Backups stored on a Windows Home Server are completely safe, as are files copied to the server for safekeeping or streaming. This issue affects only files that are saved directly from one of the listed applications to a shared folder on a Windows Home Server.

I fully expect the current bug to be patched fairly quickly now that a repro case is available. Meanwhile, it pays to be conservative and heed the advice of that KB article, even if the odds are relatively low that this particular bug will strike you.

As usual, a nice job there by Ed. And some welcome good news about WHS.

Discuss this Article 3

Waethorn
on Dec 28, 2007
I would bet this has something to do with files that are either a) compressed, or b) already exist in some kind of database structure. Look at the culprits: Outlook, Money, and OneNote utilize compressed data with NTFS streams, as does Vista's Photo Gallery, and Windows Live Photo Gallery also uses SQL Compact Edition for storing much of its data. Then you're putting them on a new single instance storage engine on WHS. Um....considering that most WHS servers are low-powered budget CPU's of more than 2 years ago, that's a fair bit of processing power needed to work on those files. Is there any wonder that something gets screwed up somewhere along the line when working on that kind of stuff over a network?
Waethorn
on Dec 28, 2007
BTW: Has anybody ever tried doing the same thing by storing typically local stuff in a Windows SharePoint Services document store on an equally under-powered server system? I bet the results would be similarly ugly.
DRWAM
on Dec 29, 2007
This was all in the link that I posted on 12/26 at 1:55 PM or so. Here it is again. I found it first! http://www.computerworld.com/action/article.do?command=viewArticleBasic&...

Please or Register to post comments.

IT/Dev Connections

Las Vegas
September 30th - October 4th

Paul ThurottYou'll have the opportunity to experience:
• 120 Technical
Sessions
• Networking with Peers
• Expert Speakers


Come See Paul Thurrott & Mary Jo Foley in Person!

Register Now

Office 365 InfoCenter

Get the latest insight and info from Paul

Read Now!

What I Use