I bought an Acer laptop for my daughter for Christmas running Win 8.1. I can't get it to back up to the server. It shows multiple failures most days, and when I try a manual it tries but after several minutes it reports failure. I have 5 PCs backing up to WHS with no problems except this new one, including two with Win 8.1 and 2 with UEFI. I've uninstalled the connector and reinstalled to no avail. Not much to go on, but any ideas?
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WHS 2011 Client Backup Problem
- Thread starter yossarian
- Start date
So I have a little more information.
Ran a chkdsk /f /r twice. Didn't help.
Checked the error log on the Acer and it gave:
Volume Shadow Copy Service error: Unexpected error querying for the IVssWriterCallback interface. hr = 0x80070005, Access is denied.
. This is often caused by incorrect security settings in either the writer or requestor process.
Operation:
Gathering Writer Data
Context:
Writer Class Id: {e8132975-6f93-4464-a53e-1050253ae220}
Writer Name: System Writer
Writer Instance ID: {eed83a23-01f2-44f1-9a2f-237fe96232db}
So I ran VSSADMIN and all the writers came back as stable except for System Writer that has [5] Waiting for completion.
I'm thinking that the problem may lie with getting System Writer re registered. But most of the info I've found resets a whole list, and may not be for Win 8.1. Others suggest deleting registry keys that will get restored after boot. I don't know anything about VSS writers. Any suggestions on getting this one working again for Win 8.1?
Ran a chkdsk /f /r twice. Didn't help.
Checked the error log on the Acer and it gave:
Volume Shadow Copy Service error: Unexpected error querying for the IVssWriterCallback interface. hr = 0x80070005, Access is denied.
. This is often caused by incorrect security settings in either the writer or requestor process.
Operation:
Gathering Writer Data
Context:
Writer Class Id: {e8132975-6f93-4464-a53e-1050253ae220}
Writer Name: System Writer
Writer Instance ID: {eed83a23-01f2-44f1-9a2f-237fe96232db}
So I ran VSSADMIN and all the writers came back as stable except for System Writer that has [5] Waiting for completion.
I'm thinking that the problem may lie with getting System Writer re registered. But most of the info I've found resets a whole list, and may not be for Win 8.1. Others suggest deleting registry keys that will get restored after boot. I don't know anything about VSS writers. Any suggestions on getting this one working again for Win 8.1?
Problem solved. Found this answer:
Step 1. Uninstall Acer Backup -- fixes initial VSS error.
Step 2. Request the UEFI hotfix from MS and install. It upgrades the client software.
From http://forum.wegotserved.com/index.php/topic/28328-whs-2011-win-8-pro-shadow-copy-access-denied/
For me, the laptop did not have Acer Backup so I didn't do step 1. Step 2 appears to have solved it entirely. As they say, you have to install the kb2781272 hotfix, then run update on the server and clients to update the connector. All fine now.
Step 1. Uninstall Acer Backup -- fixes initial VSS error.
Step 2. Request the UEFI hotfix from MS and install. It upgrades the client software.
From http://forum.wegotserved.com/index.php/topic/28328-whs-2011-win-8-pro-shadow-copy-access-denied/
For me, the laptop did not have Acer Backup so I didn't do step 1. Step 2 appears to have solved it entirely. As they say, you have to install the kb2781272 hotfix, then run update on the server and clients to update the connector. All fine now.