Veeam changed block tracking cannot be enabled. Backing up file "[SAN1-Vol5] RH3/RH3-flat.

May 31, 2018 · Cause: สาเหตุเนื่องมาจาก โดยปกติ Product ที่ใช้ในการ Backup อย่าง Veeam หรือ VMware vSphere Data Recovery จะนำประโยชน์ของ CBT มาใช้ในการทำ Incremental Backup ซึ่งจะต้อง Enable บน VM Nov 19, 2015 · Apologies if already discussed. So, I kicked off a replica job and notice that I am getting a new message at the very bottom of my Realtime Stats. Tracking for virtual disks is done in the virtualization layer. Please help me. Feb 23, 2024 · Click Map backup and select the desired backup. One or more snapshots present. Because incremental Jan 26, 2011 · Veeam Backup will then automatically re-enable changed block tracking with the correct settings during the next job run. Feb 24, 2021 · Basically, CBT will not be used if you run backups in full mode only. You can't leverage CBT on a VM with snapshots. Regards, Eric Jan 21, 2021 · To automatically allow Veeam Backup for Microsoft 365 to mark a Web Part as exportable you must enable the "Allow custom script" option for affected SharePoint sites. \Veeam. You can certainly disable Veeam CBT using the GUI but this would only affect the original Veeam CBT file system driver for pre-HV2016 hosts/cluster. Removing snapshot Veeam Community discussions and solutions for: Lost VMDK , Changed block tracking cannot be enabled: virtual hardware version 7 or later required. Creating snapshot Dec 29, 2022 · CBT is used to determine which blocks have changed since the last snapshot. " In addition the VM is off, so this would not work anyway (its an powered-off replica). 00 GB Processing rate: 43 MB/s Backup mode: SAN/NBD without changed block tracking Start time: 10/29/2009 12:06:40 AM End time: 10/29/2009 Feb 12, 2012 · "Changed block tracking cannot be enabled one or more snapshots present" I know this is a limitation of CBT. Aug 21, 2009 · Enabling changed block tracking Changed block tracking cannot be enabled: virtual hardware version 7 or later required. Retrieving VM disks information Disk '[VMFS3] ghost/ghost_1. CBT is exposed through vSphere APIs for Data Protection (VADP) to 3rd party applications. To resolve this, open VMware vSphere Client, right-click the VM, choose Edit Settings, Options tab, select General, click Configuration Parameters, and set all entries with ‘ctkEnabled’ substring After upgrading to V7 I am getting the message that CBT is enabled when I run a job, but it is not using CBT when I look at the details. So far so good, but the amount of data that was processed at next incremental backup of target VM was even more than a full backup. For VMs of recent virtual hardware versions, CBT version 2 uses a smaller and adaptable block size. Mar 29, 2019 · the backup speed went faster but the slowness and the lag still there when Veeam is performing backup or replication. 0. Snapshots do not prevent changed block tracking from functioning once it is enabled. In my case, CBT was already enabled in our backup jub. Recently he decided to delete some of the manual snapshots and now Veeam is stuck. "9/26/2013 9:33:37 AM :: Changed block tracking is enabled" then I click on the VM name "9/26/2013 9:37:53 AM :: Hard disk 1 (49. ESXi 3. In such cases CBT can not start change tracking on the System volume. As a result, for volumes that use other file systems, incremental backup will require greater time, because Veeam Agent for Microsoft Windows will read all data from the VSS snapshot to detect what blocks have changed since the last job session. I run the full replica, then when i run incremental i see the: Cannot find dirty block information in the previous restore point, CBT will not be used and job re-read the entire 55TB of vm for a total of 20 hours. VBR uses this feature to track changes between incremental backups and make those backups faster. Veeam support told me to change the RAW LUN setting in the VM from physical to virtual (compatibility mode), since physical mode isn't supported. 0 can potentially render the data in backups or replicas inconsistent or corrupt. Apr 28, 2023 · In this brief tutorial we show the simple steps to reset the Changed Block Tracking (CBT) for vSphere virtual machines. 0, which allows third-party data protection applications to leverage CBT to perform more efficient backup and replication. " Dec 22, 2009 · Veeam Community discussions and solutions for: Changed block tracking cannot be enabled: virtual hardware version 7 or later required. x with Change Block Tracking (CBT) enabled may not be recoverable BACK TO KB LIST Backup and Replicas of virtual machines running on ESXi 6. Sep 16, 2009 · Backup mode: NBD without changed block tracking Start time: 09. To analyse this, see my post What is the size of a changed block tracking block. the setting is checked to "Use changed block tracking data" and "Enable CBT for all protected VMs automatically". 00 GB Processed size: 50. May 10, 2010 · Changed block tracking cannot be enabled: one or more snapsh. حل خطای Changed block tracking cannot be enabled: one or more snapshots present در Veeam Backup 12-11-2020, 08:12 PM بعد از آپگرید Veeam Backup & Replication به ورژن 10 ، بک آپ از Snapshot ماشین ها روی ESXI کامل شد اما پیام هشدار (Warning) زیر را نمایش میداد : Feb 16, 2012 · "Failed to create change tracking time stamp for virtual disk file C:\ClusterStorage\Volume1\VMname\etc. To keep track of changed data blocks, Veeam Backup & Replication uses the following mechanisms: [For VMs on Microsoft Hyper-V Servers 2012 R2 and earlier] Veeam proprietary changed block tracking mechanism (CBT) [For VMs on Microsoft Hyper-V Server 2016 and later] Resilient Changed Tracking; Veeam CBT Jun 13, 2022 · Short update. The worst part is, that I wouldn't even notice that my fullsynthetic backups which use changed block tracking are inconsistent. Jun 15, 2009 · Read through many of the posts on changed block tracking but can't find the answer. CBT is a fundamental parameter withing a VMware ESXi virtual machine, since it allows, when enabled, us to perform incremental and differential backups of VMware virtual machines. vmdk" One or more VM disks have incorrect changed block tracking Sep 30, 2019 · Starting in the VM hardware version 8 and above, RCT is enabled by default and as far as I understand it, it cannot be disabled. On some of the jobs when I run an incremental sync I see the following message in the job details : Cannot find dirty block information in the previous restore point, CBT will not be used It's happening only to some VM's, usuually the larger ones. We store our restore points as Snapshots. Click the VM Options tab. Veeam support presumed, that something with "Changed Block Tracking" (CBT) is not correct. Although not user visible, this improves the resolution of tracking changes, decreases the amount of backup data, and improves perspectives for block-based recovery. For CBT to identify altered disk sectors since the last change ID, the following items are required: The host must be ESX/ESXi 4. Jun 1, 2023 · What Is Changed Block Tracking? Changed Block Tracking (CBT) is a native VMware feature that logs changed blocks in a tracking file. incorrect VM hardware version, snapshots present and so on). vmdk" BackupDisk failed Client error: Connection timed out Unable to retrieve next block transmission command. PS C:\Program Files\Veeam\Endpoint Backup> . This really helps understading how actually CBT works!! So, to the final question. To find the backup, you can use the search field at the bottom of the Select Backup window. 0 or later. This did not solve my problem yet but maybe it is helping someone else with a similar problem. Or are you talking about the checkbox "Install changed block tracking driver on Windows Server OS" in the protection group creation wizard? You may refer to this page to get more details about limitations and prerequisites. After processing the backup it has a "Total size" of 50 GB and a "Backup size" of 35,8 GB due to deduplication. Dec 22, 2009 · OK, in that case, I would expect changed block tracking to be in use. Feb 26, 2012 · "2/26/2012 9:59:11 AM :: Changed block tracking cannot be enabled: one or more snapshots present. Changed Block Tracking cannot be enabled. Some backup tools automatically enable CBT, For more information, see Enabling or disabling Changed Block Tracking (CBT) on virtual machines (1031873). Remove all snapshots, let Veeam Backup enable change block tracking on a VM, then you can create snapshots again. We would like to show you a description here but the site won’t allow us. Mar 1, 2024 · The changed block tracking (CBT) mechanism allows Veeam Backup for Microsoft Azure to reduce the amount of data read from processed virtual disks, and to increase the speed and efficiency of incremental Changed Block Tracking (CBT) is a VMkernel feature that keeps track of the storage blocks of virtual machines as they change over time. Post Veeam Backup, we have a warning saying Enabling Changed Block Tracking. Mar 18, 2009 · - latest Veeam - ctk enabled on guests and their drives - usage of vStorage Api "Network" - two replikation since then Speed is fine but apparently without block tracking "Backup mode: NBD without changed block tracking" in realtime statistics David Correct, everything is fully automated. I tried my first mass backup to a NetGear readyNAS 1100 on 100Mbps LAN of some Linux VMs (10GB in size, 23 in total) all are ok with processing rate 78MB/s approx with duration 3 minutes. If I setup a replication job each night of all the customers VM's to a secondary SAN. " warning from occurring in a backup job after a virtual disk size is changed? We often get questioned about this warning from customers the day after we've performed a virtual disk size change. But it was consisting a warning "Changed block tracking cannot be enabled: one or more snapshots present. Manager. Because incremental Oct 2, 2013 · Veeam Community discussions and solutions for: Changed Block Tracking and Snapshots of VMware vSphere Backup mode: NBD without changed block tracking Start time: 3-8-2010 3:47:23 End time: 3-8-2010 3:53:26 Duration: 0:06:03 Enabling changed block tracking Changed block tracking cannot be enabled: virtual hardware version 7 or later required. Veeam Agent for Microsoft Windows uses the default CBT mechanism for NTFS volumes only. x with Change Block Tracking (CBT) enabled may not be recoverable Challenge Leveraging VMware Changed Block Tracking (CBT) data supplied by VMware ESXi 6. The included hard disk has 50 GB. EndPoint. Or there should be an explanation in the session's log why it is not being leveraged (or why it cannot be enabled). Am assuming the "Enabling changed block trackingChanged block tracking cannot be enabled: virtual hardware version 7 or later required. This setting is automatically enabled (set to TRUE) for all VMs included in the Veeam Backup job automatically when VM is first added to the job (during the first backup cycle for this VM). Each VM gets a "Changed Block Tracking cannot be enabled: one or more snapshots present. The clues were there, but it wasn't overtly obvious what the problem was. Limitations on Changed Block Tracking Changed block tracking does not work if the virtual hardware version is 6 or earlier, in physical compatibility RDM mode, or when the virtual disk is attached to a shared virtual SCSI bus. Click Advanced, and then click Edit Configuration next to Configuration Parameters. So for example if you have a 2TB backup with CBT enabled the vm backup will always have to transfer 2TB, Nov 7, 2009 · Veeam Community discussions and solutions for: Two backup jobs on a VM and CBT (changed block tracking)? of Veeam Backup & Replication Jun 10, 2010 · Hello Tobi, First of all, to be able to use Change Block Tracking you need to remove current snapshot for the source VM. vmdk file as well as going through a stun/unstun cycle as it allows a change tracking filter to be inserted into the storage stack for that VM when certain operations such as Veeam backups Apr 26, 2011 · Great, thanks for the excellent explanation Anton. A customer changed permissions of files on a Windows file-server VM. If VMware change tracking cannot be enabled for some reason, the entire VM hard drive is read to identify changed blocks (this is performed by our proprietary change tracking engine) and then only changed blocks are replicated to the target side. Oct 10, 2020 · VM Snapshots will not be backed up in any case - VM is always protected in the latest(aka when backup job triggers) state. It will 1. With thin Jan 1, 2017 · Changed block tracking will not be used for this VM until you upgrade VM hardware version to 8. Secondly, as far as I got it right from the google translate there is an issue with snapshot creating procedure, could you please clarify if you're able to create snapshot manually for this VM using vSphere Client? Nov 2, 2010 · Disk "Hard disk 2" has incorrect changed block tracking configuration. On that VM the developer started taking manual snapshots intermingled with the ones from Veeam. Jun 25, 2024 · If Veeam Backup & Replication cannot leverage VMware vSphere CBT, it fails over to the Veeam proprietary filtering mechanism. v4 vm's backup fine - the only bit that's missing is change block tracking Backing up using the vStroage api, you'll see a messages like: 5 of 5 files processed Total VM size: 50. When using the Veeam plugin with BCT enabled, Veeam reads the BCT bitmap file to identify the blocks that have changed since the last backup. NOTE. Aug 14, 2012 · since we updated to Veeam 8 we are getting warning messages when a VM either has: - a snapshot -> Changed block tracking cannot be enabled: one or more snapshots present - or has no VMware tools -> Cannot use VMware Tools quiescence because VMware Tools are not found - or the Backup job is empty Change Block Tracking (CBT) นั้นคือหนึ่งในคุณสมบัติใหม่ใน vSphere 4 ซึ่งท าหน้าที่ในการจับความเคลื่อนไหวของ Changed block tracking (CBT) received several important enhancements in vSphere 7. Creating snapshot Yes, changed block tracking cannot be enabled if VM has snapshots - it is VMware limitation. But how can I suppress this warning. To enable changed block tracking and back up with the VMware vSphere API: Query change tracking status of the virtual machine. Nov 29, 2023 · IMPORTANT. To learn more, see Default Changed Block Tracking Mechanism. Feb 3, 2021 · To enable CBT in a virtual machine: Power off the virtual machine. Important: Custom scripting support in SharePoint Online is changing, and so the content of this knowledge base article is subject to change. ; Veeam Agent uses the Veeam CBT driver to back up files of 50 MB and larger including files with unchanged last modification time attribute. exe RESETCBT R:\ The system cannot find the file specified. 2009 12:03:44 Time remaining: 08:50:47 Backing up file "[MSA] xxx/xxx-flat. exe sums blocks that are use multiple times and do not take the used partition size into account. IsTrackingEnabled}. Oct 20, 2020 · blockstat. Feb 16, 2010 · Hi, We run our backups as a full backup every day. Feb 17, 2010 · Within Veeam B&R 4. Backing up file "[Vshpere When you perform active full backup, Veeam Agent for Microsoft Windows reads backed-up data, compresses it and copies it to the target location. 12. For Veeam Agent, there are two CBT methods: - Default CBT mechanism for NTFS volumes only, leverages Master File Table to track changed blocks - Veeam Changed Block Tracking Driver Works for all filesystem types and is the recommended for large databases For VMware VMs, there is only one type of CBT. The Veeam CBT driver is designed to track data blocks that changed since the last run of the backup job. Dec 2, 2023 · If you check here you can see the statement about the CBT driver and what it does - Veeam Changed Block Tracking Driver - Veeam Agent for Microsoft Windows Guide. 0 and later (VM version 11) 3. " Apr 16, 2020 · Change Block Tracking (CBT) is a feature that allows tracking of changed disk sectors. Mar 10, 2021 · Hi, Thanks for your post, based on my understanding, the issue is that Hyper V VM has performance issue when use Veeam backup. Backup and Replicas of virtual machines running on ESXi 6. . May 28, 2010 · Disk "Hard disk 2" has incorrect changed block tracking configuration. I noticed that i'm receiving a warning about [Changed block tracking cannot be enabled: one or more snapshots present] i went to the options of veeam and i noticed both options are on please check below: May 5, 2020 · After upgrade to Veeam Backup & Replication 10, Backup from Cisco HyperFlex Snapshots job completes with the warning "Changed block tracking cannot be enabled: one or more snapshots are prese Sep 30, 2014 · Right-click on each host in the cluster, select Manage Volumes and then tick the box to "Disable changed block tracking for this host (not recommended)" In an elevated command prompt , on each Hyper-V host in the cluster, Run sc stop VeeamFCT , to ensure the CBT service is stopped. CBT is used to optimize the virtual machine backups by reading only the allocated and modified portions of the virtual disk. the hardware version of the VM is ESXi 6. Since performance issue need to analyze performance logs, we are limited to collect the performance logs via forum and the issue is also related with third-party application, which will be complex to troubleshoot, I would suggest you open a case with MS for better help. Do we need to delete manual snapshots before doing any Veeam backups? Thanks in advance for any assistance It is a known issue for the situations when C:\ volume is also a System volume (meaning, it contains a boot record). Microsoft Hyper-V Change Block Tracking. I don't wanna see a warning message in the job state. the other 4 VMs in this backup job are using changed block tracking ok and don't have this line in their log 4. Nov 30, 2012 · Each "replica" also has a number of restore points, based on the settings for the replication job. May 24, 2012 · Changed block tracking cannot be enabled: one or more snapshots present. 0 GB)" (note, no [CBT] is listed) Veeam Support - Case # 00451398 Feb 7, 2022 · It measures all VM virtual disks for which Change Block Tracking (CBT) has been enabled. Changes were replicated using DFS. Changed block tracking must be enabled on the VM for this backup type. The first time it is run, it creates a file containing baseline data (CBT change IDs and times). Jan 22, 2010 · The same problem could occur if I have 2 or more VeeamBackup-Servers or if I do replicas and normal Veeam-Backups (with enabled changed block tracking) of the same VM at the same time. Thanks! Jul 21, 2011 · The entire hard drive is never replicated during the incremental job pass. To keep track of changed data blocks, Veeam Agent for Microsoft Windows can use the following mechanisms: Default CBT mechanism — this mechanism is enabled by default in all installations of Veeam Agent for Microsoft Windows. I backed up a server with 12 Snapshots (not the best practive, i know) and 220 GB of data. Instead of tracking changed blocks of data, Veeam Backup & Replication filters out unchanged data blocks. Cause This is a VMware ESXi issue in CBT logic Oct 19, 2010 · Veeam Community discussions and solutions for: change block tracking and multiple jobs of Veeam Backup & Replication On both jobs change block tracking is enabled. See above concerning the stun-unstun cycle. Each subsequent run measures changes since the last run. Changed Block Tracking (CBT) is a mechanism that will enhance the backup performance of VHDX-format disks for Hyper-V virtual machines running on Windows Server 2012 R2 editions. The resolution is one of the two options below: 1) Remove CBT driver OR 2) Create a dedicated System partition on another volume (not C:\). Whenever a change to a source VM disk is made, all restore points for that replica must be deleted so that we can change the size of the disk (VMware does not allow a VM with snapshots to change this disk size). In case of the file-level backup, consider the following: Veeam Agent does not use the Veeam CBT driver to back up deduplicated files. by regi » Wed May 19, 2010 9:17 am. It looks like it's having an issue right at the beginning during a check to see if tracking is even enabled. Changed block tracking is disabled. Apr 4, 2019 · Veeam Support Knowledge Base; Veeam Agent for Microsoft Windows CBT driver installation fails with "Unable to install Veeam change block tracking driver: Microsoft Windows Security Update KB3033929 is missing. Prior to installing the Veeam CBT driver on a computer running Microsoft Windows Server 2008 R2 SP1, make sure that update KB3033929 is installed in the OS. As soon as I turned the node back on (not actually hosting any VM's) the next backup worked fine without that message. Dec 7, 2012 · Just to clarify, its a "VM Copy" job. CBT is part of VMware vSphere Storage APIs – Data Protection framework first released in version 4. May 9, 2024 · Hi, i have a vm with 10 virtual disk with about 55TB of data to transfer via replication every 2 hours. 11. ; The update adds the SHA-2 code signing support that is required for verification of the Veeam CBT driver signature. May 31, 2019 · If you call QueryChangedDiskAreas after a snapshot but before you enable changed block tracking, it also returns unallocated areas of virtual disk. How do you judge on whether it is being used? Note that you will only see changed block tracking used when the job is copying virtual disk (VMDK) files. Nov 17, 2015 · Backup and Replicas of virtual machines running on ESXi 6. This creates a little bit of overhead on the VMware host as it writes to the *ctk. Jan 4, 2024 · The changed block tracking (CBT) mechanism allows Veeam Backup for Nutanix AHV to increase the speed and efficiency of incremental backups: During a full backup session Veeam Backup for Nutanix AHV reads only written data blocks, while unallocated data blocks are filtered out. One or more VM disks have incorrect changed block tracking configuration. Can I safety assume that this full backup is complete with success, just that changed block tracking for incremental backup may not work? Also, Veeam backup to local storage has no issue, but when backing up to a mapped network storage, Veeam will show this error: Oct 8, 2017 · 1. Anyhow, yes, it is recommended to fully-utilize incremental backup - warning you have seen expressed that we had to read entire vmdk disk to process changed blocks via Veeam proprietary methods, whereas we could have used VMware native Changed Block Tracking - that is, if Mar 1, 2024 · The changed block tracking (CBT) mechanism allows Veeam Backup for Microsoft Azure to reduce the amount of data read from processed virtual disks, and to increase the speed and efficiency of incremental Nov 22, 2023 · NOTE. If false, activate changed block tracking. The VMkernel keeps track of block changes on virtual machines, which enhances the backup process for applications that have been developed to take advantage of VMware’s vStorage APIs. Hi. vmdk" Enabling changed block tracking Changed block tracking cannot be enabled: virtual hardware version 7 or later required. 1, I am still connected to the server, can see my jobs, etc. Oct 23, 2020 · An interesting question arose some time ago. If any of the previous snapshots are detected, the Changed Block Tracking is disabled and the incremental backup reads the whole backup plan dataset. 0 patch 3 installed on 64bit W2K8 backing up Windows VMs on vSphere ESXi 4. Mar 13, 2012 · Veeam 6. vhdx" It then reread the whole VM taking hours instead of minutes to backup each VM. Number of already processed blocks: [3454]. g. Situation is that I have some VMs that report that the backup has been done without changed block tracking, which is strange because: - All VMs are HW7 - None have snapshots - Only two report: Disk "Hard disk 2" has incorrect changed block tracking configuration. This setting is present and enabled in all VMs for which you want to be able to use ESX4 changed block tracking functionality. x with Change Block Tracking (CBT) enabled may not be recoverable Oct 31, 2014 · VladV wrote:CBT is disabled by default and gets enabled automatically when the VM is processed by Veeam and the option "Enable CBT for all protected VMs automatically" is selected in the Backup or Replication job. We are using Veeam replication to migrate to a new VMWare environment. Right-click on the virtual machine and click Edit Settings. In case the Change Block Tracking feature is enabled on the ESXi server and is enabled by the user in a VMware backup plan, Backup for Windows attempts to enable it on every backup plan run. Backing up file "[SAN1-Vol5] RH3/RH3-flat. Sep 16, 2009 · Backup mode: SAN/NBD without changed block tracking Start time: 11/13/2009 12:15:29 PM End time: 11/13/2009 12:16:26 PM Duration: 0:00:56 Enabling changed block tracking Changed block tracking cannot be enabled: virtual hardware version 7 or later required. 2. You will not be able to successfully complete the setting without powering off the virtual machine. Jul 31, 2014 · Is there any way to mitigate the "size changed. There's some additional information in the user guide about it: Nov 5, 2023 · During last 2 months I had 3 occasions where Veeam was reporting "Changed block tracking map was changed for volume" and making full long running scan of the backed up volumes: Backup device was detached for a couple of weeks from source filesystems Dec 2, 2009 · Veeam Community discussions and solutions for: Changed Block Tracking warning for multiple VMs of Veeam Backup & Replication Mar 22, 2023 · The Veeam plugin for Oracle uses Oracle Block Change Tracking (BCT) to perform faster and more efficient backups of Oracle databases. " When I tried to run a job from the LAN Replica to the WAN Replica, I got this message. Jan 11, 2021 · But interestingly I have the same issue: snapshot existent, but I cannot force developer to delete. Before you will run the Coriolis Replica/Migration task with the help of CBT, you must re-enable CBT manually or allow Coriolis to enable CBT when selecting VMware as a source. The point here is that the daily backup was running for this specific backup job with block tracking for some days successfully and now suddenly not successful any more. 1 update 2. ". At the moment Changed Block Tracking is enabled on all of the backup jobs. When backing up VMware vSphere environments, using Changed Block Tracking, it is also very interesting how many block in what size are selected for backup. Just saw this today. Veeam Backup will either enable change tracking automatically for you, or will log warning in the session's log on why it could not do this (e. Error: in [VctInit] at step [1] Agent failed to process method {VeeamVolumeCt. Here is the log: *** Enabling changed block tracking Changed block tracking cannot be enabled: one or more snapshots present. Nov 12, 2018 · The Veeam Technician is correct. vmdk' has been skipped due to unsupported type (raw device mapping in physical mode compatibility mode) Backing up object "[VMFS3] ghost/ghost. One of my file server jobs has started to hang - realtime statistics show 0KB/s for all, and the first VM in the list has status 'pending' with nothing listed in the right-hand action/duration pane. ; Keep in mind that Veeam Agent displays only those backups that were created on the same Veeam Agent computer with the same account used to connect to the Microsoft Azure Blob storage. When you perform synthetic full backup, Veeam Agent for Microsoft Windows does not retrieve all backed-up data from the Veeam Agent computer. 5 supported only up to virtual hardware version 4. Instead, it creates a new incremental backup and then Oct 25, 2023 · The changed block tracking (CBT) mechanism allows Veeam Backup for AWS to reduce the amount of data read from processed EBS volumes, and to increase the speed and efficiency of incremental backups: During a full backup session, Veeam Backup for AWS reads only written data blocks, while unallocated data blocks are filtered out. Sep 5, 2013 · Veeam Community discussions and solutions for: Changed block tracking cannot be enabled: one or more snapsh of VMware vSphere In the new dialog box, locate or create a row with name ctkEnabled, and set its value to true not false. An interesting question arose some time ago. So, I upgraded the VM configuration version, enabled AAP and the job completed successfully. yp rg sz ny xp qb ef vq tr lp