That's just incredible!!! I have exactly the same problem on a fully patched Windows server and lost about backups. Thank you. They were greyed out, so I had to delete these by hand. Anyway, I think the description of the event is correct. Too much disk IO at startup is the cause for this problem. Very Disk IO intensive! There will probably be more.
The PerfOptions is not set for any application, but you can set it yourself in the Registry. I have tried to summarize their workings and defaults the best I could find. Note that VSS Snapshot sometimes simply don't show but after reboot they appear again. What are the times of the Event ID 25 for others? For the most part mine happen at the same time of day AM. Are others seeing, losing the snapshots at roughly the same time always? For redundancy and system state backup, I've configured Windows Backup to "backup to a shared network folder".
It's just a mapped partition on an external drive. This forces Windows backup to only make full backups with no shadow copies on the target. I keep 2 copies by scheduling this bat file to run before the backup.
You can change the script if you want to keep more than 2 copies - example at end of post:. Create a new backup schedule backing up to a network location: "Backup to a Shared Network Folder". Can confirm the same issue on Windows as well. I'm very interested in the ActiveWriterStateTimeout registry setting, as this is pretty much the only reference on Google that I could find of this.
I'm going to give it a try. Microsoft, any comment? I don't know why I just said that, they don't read any of this. Office Office Exchange Server. Not an IT pro? Windows Client. Sign in. United States English. Ask a question. Quick access. Search related threads. Remove From My Forums. Asked by:. Archived Forums. Backup — Windows and Windows Server. Sign in to vote. Each drive is rotated out weekly, meaning that one drive is attached one week, then the other drive is swapped in the following week, ad infinitum for the best part of a year.
Two backups were being made each day to the attached drive, one at 12pm and one at 9pm. See below for both Event ID message contents. Unfortuneately, neither events were noted until the drive was swapped out with the other drive and some how the problem was propagated to the second drive, resulting in the deletion of all shadow copies on the second drive, too.
The end result BOTH drives lost ALL previous backups leaving only the most recent full backup and no clue as to why it happened or how to prevent it from happening again. Virtually no older backup file versions could be recovered. I was under the impression that, by design, the WSB utility would only start deleting the oldest backups on a full drive in order to make room for the newer backups.
Granted, had I been keeping attention, I would have actually swapped out the full drives before the actually got full, so that NO data was deleted. If I'm to continue using the Windows Server Backup utility, I need to know what happened and how to absolutely prevent it from happening again. I never expected to loose BOTH backups at the same time, and due to budget restraints, two rotating backup drives seemed a logical solution.
NOTE: Though I'm not sure if this has any bearing on the situation, the server is configured to make two snapshots a day of two volumes on the server, however, when I looked at the Shadow Copy settings I couldn't quite be sure if the VSS wasn't somehow also making snapshots on the two external drives, even though I haven't specified VSS to do so. None show up on the two replacement drives I'm now using, so I'd say not.
Information on how to prevent this from happening again would greatly be appreciated. I'll be making sure no backup drive gets even close to being full from now on, that's for sure!
Thanks, Joseph. Changed type Sushil. Thursday, February 11, PM. Hello Joseph, The EventId 25 from volsnap deleting all the snapshots is not an expected behaviour. I need to follow up with some other teams to find out why such an event happened. I have not seen this issue earlier. The windows backup explicitly reclaims space for the current backup by deleting older snapshots OR volsnap will automatically delete older versions in case of Copy On Write COW which is exactly what happened with the EventId: 33 and this is an expected behaviour.
Can you please share with us some informations: 1. The VSS shadow copy space on the target volulme. Use the following command from an elevated window. Assuming D: to be the target volume. Friday, February 12, PM. Hello Joseph, Can you please share with us the above requested information. Also can you please share if some other application is also acessing the target volume? Tuesday, February 16, AM. Hello Joseph, can you please share with the informations as requested above.
Please keep the subject of the email same as this thread for easy tracking. Wednesday, February 17, AM. Wednesday, February 17, PM. I am following up offline with the Joseph and the volsnap team.
Since this is a difficult to repro it locally, this analysis may take some time. I will update the thread once I have some useful information to share. Monday, March 15, AM. Hi all, I have the same problem on a 2 nodes cluster windows enterprise R2 that host the file resources. Thanks Jay. Wednesday, March 24, AM. I have the same setup as Joseph C, and I've just encountered the same problem.
Thanks, Ben. Wednesday, July 21, AM. Thanks Peter. Tuesday, August 10, AM. Hi, Just got the same event 25 here. It occurred during software installation. Any ides? Thursday, August 19, AM. Any updates on this? Monday, November 8, PM. Tuesday, November 23, PM. Hey Guys! Saturday, May 21, PM. I'd like to add myself to the list of people experiencing this issue. Thanks, Chris. Tuesday, May 24, AM. Friday, June 3, PM. Seems like conflicting information as Bikash references "The EventId 25 from volsnap deleting all the snapshots is not an expected behaviour.
Monday, June 6, PM. Wednesday, July 13, PM. Monday, November 21, AM. Drive T: is the one you are backing up, is that correct? Sorry, to clarify - is T: the source or the destination for the backup? Interesting, Have you explicitly enabled Shadow Copies on T:? Bump, is the best way of escalation to call them directly about it and mention this thread or maybe a MOD could forward it to them directly?
Tuesday, November 22, AM. Wednesday, December 21, PM. Monday, June 11, PM. Tuesday, June 12, PM. Exactly, I had this same problem a year ago , and only managed to solve by changing the "no limit " to limit any higher than necessary. This solves the problem. Sincerely, Rodrigo Antunes. Sunday, June 17, PM.
I have similar problem. Platform: Windows Server standard R2 with 4 hard drives. Someone could tell me what is all about? Thanks in advance. Tuesday, July 3, PM. Coul'd you please point me exactly what I should analize in this thread? Becouse it is not obvious what you have on mind.
Tuesday, July 10, AM. Tuesday, July 10, PM. What is the volsnap. What causes volsnap. How to fix the volsnap. We analyzed several posts and have learned how to solve this volsnap.
This post from MiniTool shows you solutions. The volsnap. That is to say, the driver has direct access to internals of the operating system, hardware and so on.
However, when you boot the computer, you may come across the volsnap. In the following section, we will list several causes of the volsnap. Of course, the volsnap. In addition to that something that will help alleviate the IO on the source disk is placing the shadow copies onto another drive completely. You can run the following command on the host in order to place the shadow copy on another disk; drive letters need to be changed accordingly:.
Adjusting the page file to 1. Note that if you set the it to the maximum page file available, you will be required to restart the machine. Increases not going up to the maximum do not typically require a restart. The shadow copies of volume D: were aborted because volume D:, which contains shadow copy storage for this shadow copy, was force dismounted.
These two events are usually coupled together. There was insufficient disk space on volume D: to grow the shadow copy storage for shadow copies of D:. As a result of this failure all shadow copies of volume D: are at risk of being deleted. In this case it means that the shadow copy was dismounted due to insufficient disk space on the volume. The shadow copies of volume D: were aborted because the shadow copy storage could not grow due to a user imposed limit.
To resolve this error you can run the following commands to expand the ShadowStorage; drive letters need to be changed accordingly:. Also note that in case you're using a CSV Clustered Shared Volume , instead of a drive letter being listed in the event log, there will be an empty space. Did you find it helpful? Yes No. For Companies. Hyper-V and VMware Backup.
Office Backup. Physical Server Backup. Endpoint Backup.
0コメント