Environment: Win1022H2, Veeam Agent f. Windows 6.0.0.960, 6 local drives
When running backup CBT is functional for all but one drive.
Trying to restore gives “driver not installed”
There is no option to install Veeam CBT driver
Any ideas?
Klaus
Best answer by BstAA
View original
+17
Is this a VM or a physical system?
It it is a VM, is the disk different defined as the others? Independent versus dependent…
Do you have complete error messages or a logfile you can post here?
This is a physical system. Running a backup job gives no error but the log shows that one of the six drives doesn’t use CBT (and incremental backup on this drive needs 17 min whereas the other drives need 1-2 min). The drive in question as well as 3 others are SSD two are rotating.
where could be a logfile located?
I uninstalled and reinstalled Veeam Agent. Didn’t help
+12
This drive, most likely it‘s not NTFS.
We have two CBT mechanism.
I assume this drive is an reFS or FAT volume? If yes, then you must install our CBT driver if you want to use CBT for this volume.
There is no option to install Veeam CBT driver
This option is available in Server Edition. Starting with Veeam Agent for Windows v6, the CBT driver is also be available for the workstation edition.
Our free edition doesn‘t include the CBT driver.
Best,
Fabian
It’s definitely NTFS. And yes it’s the free edition.
is the restore CBT option only available for Veeam CBT?
Does it make sense to present the partition information for all the drives.
+17
Is this disk backed up at all?
Yes, please give the details of the disk/partitions.
oh. I’ve been on error 😥
It’s only 5 disks but 6 NTFS partitions. The partition tabel of the disk in question has two NTFS partitions:
DISKPART> lis par
Partition ### Typ Größe Offset
------------- ---------------- ------- -------
Partition 1 Wiederherstellun 1996 MB 1024 KB
Partition 2 System 400 MB 1998 MB
Partition 3 Reserviert 16 MB 2399 MB
Partition 4 Primär 310 GB 2415 MB
Partition 5 Primär 618 GB 312 GB
DISKPART> lis vol
Volume ### Bst Bezeichnung DS Typ Größe Status Info
---------- --- ----------- ----- ---------- ------- --------- --------
Volume 0 G SSD2 NTFS Partition 465 GB Fehlerfre
Volume 1 F 3TB-WD-RED NTFS Partition 2794 GB Fehlerfre
Volume 2 D SpeedyData NTFS Partition 2794 GB Fehlerfre
Volume 3 C SPEED11-SYS NTFS Partition 310 GB Fehlerfre Startpar
* Volume 4 E Virtual-C NTFS Partition 618 GB Fehlerfre
Volume 5 Wiederherst NTFS Partition 1996 MB Fehlerfre Versteck
Volume 6 FAT32 Partition 400 MB Fehlerfre System
Volume 7 H SSD1 NTFS Partition 465 GB FehlerfreVolume 3 and 4 are on one disk. All volumes but Volume 4 (E: Virtual-C marked with a “*”) use CBT. See screenshot
+6
Hello
To install CBT Driver:
https://helpcenter.veeam.com/docs/agentforwindows/userguide/cbt_install.html?ver=60
To reset CBT Driver:
https://helpcenter.veeam.com/docs/agentforwindows/userguide/cbt_reset.html?ver=60
+12
He already told in a previous comment is using the free edition. So your solution will not work.
Best,
Fabian
He already told in a previous comment is using the free edition. So your solution will not work.
Yes and “Resetting CBT” doesn’t work either, as this is only for the “Veeam CBT driver”
So question is:
Klaus
+12
I found an internal case where one of our SE had the same issue. There was an invalid MFT file record.
Solution was to run a chkdsk against the volume. This fixed the invalid MFT records for this volume.
Best,
Fabian
Sorry, didn’t help in my case. My test case:
chkdsk /F E:Question: Must I run chkdsk before creating a full backup? Or what can I do?
Solution:
chkdsk doesn’t help but reformation the partition.
Of course this is a high hurdle. But I didn’t find another way.
Solution:
chkdsk doesn’t help but reformation the partition.
Of course this is a high hurdle. But I didn’t find another way.
I have to reopen this thread: Still a new problem with CBT on Windows free agent. History:
Anybody any idea?
An update to this old thread.
I’ve seen this issue intermittently on one drive out of five. Workstation edition running on Windows 11 if that matters. Backups working but one 4 TB drive not using CBT so much slower than it should be.
In my case, it had nothing to do with corrupt MFT entries or other data corruption on the volume.
This volume has many VMs. Backups worked without issue until we deployed some VMs using a network appliance based on BSD. My suspicion is BSD on these VMs didn’t play nice with VSS.
We used the network appliance VMs for a couple of months and then retired them. As soon as we removed the BSD VMs, CBT started working again.
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