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Storage and Deduplication

Discuss any topic related to storage or deduplication best practices

  • 1,128 Topics
  • 4,835 Replies
1128 Topics
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TOM GTI
asked in Storage and Deduplication
AWS S3 backup unable to restore

Hi all,We would like to restore an old VM backup from AWS library in Commvault. However, it is unable to restore with an error “unable to find/get index cache[ ] at time [ ]” .Is there any way to fix such as reconstruct the index?

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J
Vaulter
Nikos.Kyrm
Byte
Nikos.KyrmByte
asked in Storage and Deduplication
Azure Blob Storage Tier selection

Hello Community, Let’s say we created an Azure Storage Account with the default "Hot" access tier. What happens if, for this specific Storage Account, we configure it as "Cool" from the Commvault side?  Does the Commvault selection ("Cool") override the Azure setting ("Hot")? Please for your feedback.Best regards,Nikos

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Damian Andre
Vaulter
SteveF
Vaulter
SteveFVaulter
asked in Storage and Deduplication
Windows Data Deduplication in VMware thin provision server

We have a customer running 11.32.89 that are protecting VMWare thin-provisioned VMs. We do primary backups with Pure snapshots. The customer informed us that they have Windows Data Deduplication (WDD) running in the VM. I am seeing older articles online around using thin provisioning and WDD that indicates larger consumption of disk because of WDD cleanup behavior. WDD doesn’t dynamically clean up; it cleans once a week. With that behavior, the thin provision VM keeps growing until the clean up happens. During the backups, we're getting horrible dedupe rates in some servers (10%). Along with that behavior, we are seeing Data Analytics (Indexing) of the VM contents taking longer than 24hrs. Finally, the CVLT provided information seems off - in that we show in the "Data on Media" view that Size on Media is at 6.3TB, but data written says 2.5TB. They're asking what's going on with that.I’m thinking the consumption is due to VM protection in that we protect what the VM size is and not what

362
SteveF
Vaulter
R
radi
asked in Storage and Deduplication
Error occurred in disk media

Hi all, Can anyone help or have you had this problem? Error occurred in disk media, path... \CV_MAGNETIC\V [[Cloud] HTTP error conflict.]. For more help, please call you vendor' support hotline

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R
T
Bit
Tom MBit
asked in Storage and Deduplication
Allow Commvault to manage Pure snapshots and replication

Hello,We have several Pure arrays at our primary Data Center that regularly create and replicate snapshots to our Pure arrays at our DR site. I would like to use these snapshots as recovery points for Commvault so I would like Commvault to manage these snapshots. We would like to run snapshots every 4 hours or so and write 1 to disk every 24 hours. I would love to get input on how others have set this up. I’m considering doing this on the Storage Policy level but am not sure that’s the way to go.

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Onno van den Berg
Commvault Certified Expert
L
Byte
LiliDaleByte
asked in Storage and Deduplication
Decommissioning of primary snapshot copy and Media Agent for p

Decommissioning of primary snapshot copy and Media Agent for primary copyI currently have a Netapp IntelliSnap backup configured with snapvault.   I want to decommission the Media Agent as well as delete the primary snapshot copy and keeping/retaining the secondary copy which is in a Netapp arrap I intend to keep.  The primary snapshot copy is located in a Netapp array I plan to decommission.Questions1. How to i deconfigure the MA involve with the primary snapshot copy and primary streaming copy so I can finally decommission the Media Agent and its associated disk library2. How do I go about deleting the primary snapshot copy so I can then decommission the Netapp array where the primary snapshot copy is located3. Is it possible to promote the snapvault copy as primary snapshot copy?Note all primary snapshot copy can be deleted/removed. We are keeping the secondary snapshot copy/Snapvault copyAny answers to the questions is appreciated

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L
Byte
S
Bit
SollyKBit
asked in Storage and Deduplication
Restore failing with error Error Code: [13:244] Description: [Media read operation failure] [Dedupe disk media] [Access to the file/media denied.]

Restore failing(goes to Pending) with error Error Code: [13:244]Description: [Media read operation failure] [Dedupe disk media] [Access to the file/media denied.]When running on Media agent 01 but goes through when running on Media Agent 02

340012
T
Byte
J
Bit
JohnXBit
asked in Storage and Deduplication
DDB Verif fails with NFS (Dataserver-IP) share on Linux MA

Hi, We have a full Linux Commcell (Redhat 9.5) in V 11.36 with a 2-node Grid MA and partitionned DDB.Firewall is enabled and port 2049,2050 and 111 are open.When I start a ddb Verif, it goes to 50% successfuly, (local verfification) and goes in pending when it tries to validate the network path on the other node using NFS.If I stop the FW on the MA then the ddb verif finish with success :BEFORE :20679 51f2 04/23 17:43:04 #### initiateSession: 3dfs server @ [MA002] started successfully!!20679 51f2 04/23 17:43:04 #### initiateSession: Share MA002:/ma/MA002/vol01/JKOLPE_04.23.2025_11.14/CV_MAGNETIC exported successfully as /ma/MA002/vol01/JKOLPE_04.23.2025_11.14/CV_MAGNETIC_c1e0710d-b14e-46aa-b840-2e833e4a4d60_21 for session [22]20679 51f2 04/23 17:43:05 #### waitForNfsReply: Error: nfs_service failed for Session [22], revents: 0x1C err: -1->rpc_service: socket error No route to host(113).20679 51f2 04/23 17:43:05 #### didMountSucceed: Failed to mount MA002:/ma/MA002/vol01/JKOLPE_04.23

81
Jon Vengust
Vaulter
A
Vaulter
ArisVaulter
asked in Storage and Deduplication
Capacity Consumption for OnePass Backup

Hi team, how much backup storage capacity will be consumed when using OnePass backup of VMware VM?Assuming we have one VMware VM (100 GB used inclusive 30 GB MS SQL DB). When we do a VM backup with DB agent, do we backup 100 GB (onepass) only? or we backup 100 GB (VM level) + 30 GB (DB agent)? It means backup storage will consume 100 GB + extra capacity from DB backup. Which one is correct?Thank you. 

223
Jon Vengust
Vaulter
M
Byte
Michael.BByte
asked in Storage and Deduplication
S3 governance mode

HiIs it planned for Commvault to support Governance Mode for S3 buckets?If yes, when can it be expected?If not, why? The Compliance Mode is far too risky and is also not recommended by most engineers.We’re using a Dell ECS on prem and I want to enable WORM but only with Governance Mode. ThanksMichael

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M
Byte
A
Byte
ameersyedByte
asked in Storage and Deduplication
Cloud library migration from Azure one tenant to another

We are running on Commvault 11.20.Currently backup jobs are using Azure Blob cloud disk library, with container default setting.  (On Azure is container type is Cool). We would like to move this storage to another tenant with different storage account with Cool/Archieve type container.  Looking for a best approach to migrate the storage, if it can be done from Commvault and not from Azure.

2949
Nikos.Kyrm
Byte
G
Bit
GlauciaBit
asked in Storage and Deduplication
VM RESTORE FROM TAPE.

Hello, I'm trying to perform a restore using a test environment.I'm trying to restore the VM using tapes. The backup server and media agent are not on the same server.When I start the restore process, I can restore the index, view the VMDK files, and start the restore pointing to a VCENTER and the datastore with space.The restore starts and reaches 92% and fails. The error message says that communication with the media agent has been lost.Has anyone experienced this and can help me?

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G
Bit
G
Bit
GlauciaBit
posted in Storage and Deduplication
VM Restore Failing at 92% – Commvault v11.32.76

Hi everyone,I'm facing a recurring issue when restoring a virtual machine (VMware) using Commvault version 11.32.76. The restore consistently fails at the same point, regardless of different configurations and attempts.🛠️ Environment Overview Restore type: Full Virtual Machine Restore Transport modes tested: NBD and NBD SSL MediaAgent: properly installed, communicates with vCenter and ESXi Destination datastore: accessible and has sufficient free space VM progress: restore completes up to 92% (~84 GB of ~91 GB total) Permissions & services: confirmed running correctly ❌ Error Behavior Restore job starts and progresses normally .vmdk files are successfully created and opened in the target datastore Failure occurs at the final phase, with the status:   RestoreVMData failed yet no specific write/read/seek errors are logged  Relevant log snippet (vsrst.log)RestoreVMData failed. CloseArchiveRet: [0] Seek Error [0] Write Error [0] Read Error [0] Browse Error [0] Restored

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G
Bit
T
Bit
thomasb808Bit
asked in Storage and Deduplication
Job Failure DDB Backup failed

I keep getting these job failures and i have gone through everything that i can think of to resolve this. does any one have any ideas or ways to fix this issue?   One or more volumes are not supported for VSS Shadow Copies. Possible causes: - Unsupported volume or file system type (eg. FAT, FAT32). - Unsupported volume size (over 64TB). - Remote or network volume not accessible. - Other, check the logs for more details.  

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sbhatia
Vaulter
G
Byte
gogi100Byte
asked in Storage and Deduplication
delete old backups

i have the commvault  v11.28.83. i want delete old backup from disk manually because of i have not empy space on my storage disk. the agging option is finishing works, but the disk space is not emptied.how to do it?

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Byte
PatricGByte
asked in Storage and Deduplication
Delete jobs

Hi,We’re trying to delete jobs thats having no data left in it. Since we have deleted all data within the subclient. In under the right storage policy viewing jobs we don’t get delete as an option in the rightclick menu.We’re running version 11.32.92 on prem.The subclient is a subclient of a Windows File System that’s been backingup data that should have been purge for several years ago.We’ve managed to delete the files backedup. But the jobs still exist in under the subclient.When trying to delete the subclient we get “The last cycle pertaining to [xxxx] subclient will be kept until those jobs are manually pruned. To confirm this action type …..How do we delete the jobs or prune them directly??

448
sbhatia
Vaulter
F
Byte
Farmer92Byte
asked in Storage and Deduplication
VMware SAN transfer backups about 25% slower after 11.36 upgrade

About 3 weeks ago we upgraded from 11.28 to 11.36.   Since then our VMware SAN mode (Fiber Channel) backups on average are 25% slower.    Has anyone else run into this?   I can see the slow down in the job run times and throughput, as well a looking at my Fiber Channel SAN ports.  Here is a screen shot of the SAN port performance for the last year.  The ports in the chart are only used to pull the VMware backups from our ESX environment.   The spikes are the full backups each weekend.   We can see the last 3 weekends have been much slower than the trend was before that.   Was there changes to the VDDK or some other related piece of the backup? 

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dude
Byte
S
Byte
skoomerByte
asked in Storage and Deduplication
Dedupe Disk Library workload caracteristica

Hello all, currently we are facing some performance issues with our disk library, which is a CIFS share provided by our central storage system/appliance.To run some analysis or to troubleshoot the problem further, we thought about to run some tools like IOmeter against the storage system an see how it performs.The question which we are now facing is how we have to configure the tool regarding the workload/storage caracteristica which commvault is creating for a storage system and a deduped library type?for example:80% read20% write4KB IO block size70% random30% sequentialand so on if there are any other values which should be considered. Many thanks and regardsSkoomer

171
Jon Vengust
Vaulter
A
Byte
Ahmed ElbablyByte
asked in Storage and Deduplication
LTO9 Tapes keep data less than the native capacity for Selective copy but near the compressed capacity for primary copy

Dear Vaulters,I have a question. I’ve configured the backup for a vm group to be on our new LTO9 tape library and configured the selective monthly backup on the same library for long retention.for the tapes of the primary copy i see that each tapes keep about 37 TB of data whereas each tape for selective copy keep about 16 TB of data. Our expectation is to keep the more data on the tapes assigned to selective copy as the same data are kept on the same library. Please let me know if this is normal behavior. BR 

152
A
Byte
I
Bit
IvanavBit
asked in Storage and Deduplication
Commvault Live Sync Server Failing Readiness Check

Hello Commvault Community,I’m facing an issue with a new virtual Live Sync server that I’ve set up to replace an existing server. The new server is running the latest CommServe Failover version and is connected to our main CommServe. However, the Live Sync replication job is failing, and the Client Connectivity check shows "Not Ready" due to communication failures with the MediaAgent. I’ve attached a screenshot of the readiness check below.What could be causing the communication failure between server and CommServe despite successful ping and DNS tests?

515
I
Bit
H
Bit
HardyBit
asked in Storage and Deduplication
The backup speed over Ethernet is only 1Gbps

I tested file copy speed via configured SMB shares and found it can reach 5Gbps. I ruled out impacts from server hard drives, NICs, and network switches. After checking the network settings in both the media agent and client properties (no specific configurations were found), where else could the bottleneck be? Thank you!

144
H
Bit
A
Byte
Austin ParkerByte
asked in Storage and Deduplication
Mount path marked "ready to retire"

Hi all-I am using the 11.36.35 2024E environment and I’ve seen no big issues, AND I haven’t seen this message ever with my storage/cv environment, until a few days or so ago. I have 18 Exagrid mount paths that hold Commvault data and replicate to  our DR location.  The mount path that’s showing “ready to retire” is one in our DR site, and that status isn’t reflected on the primary mount path.  As far as I know, it’s not been enabled by anyone.  Any thoughts at all?

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A
Byte
Ken_H
Byte
Ken_HByte
asked in Storage and Deduplication
What to do after losing backup storage

Hello everyone,My secondary site has a Windows server connected to HPE MSA disk shelves.  Earlier this year we added another disk shelf but my storage admin now tells me it’s improperly configured and he wants to correct it which will result in the lose of all the files on that individual shelf.  The storage appears to CommVault as J: (51TB), K: (51TB), L: (51TB), and M: (18TB).  It is just the M: allocation that needs to be corrected.All backups have two copies with one at my primary and one at my secondary site so I *should* be able to re-copy the affected backups over to the secondary site once the storage is fixed.  Does anyone know if there’s a procedure or web site that shows how to do this?  It would be the equivalent of recovering from an disk failure.Any help would be appreciated.Ken

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Nikos.Kyrm
Byte
S
Byte
SANAdminsByte
asked in Storage and Deduplication
Using ExaGrid - Slow Restore Performance / SynFull Performance / DDB Maintenance Issues

I have been working with ExaGrid support on slow restore speeds for about 10 weeks now and we cannot seem to figure out why the restore speeds are so slow.  We are talking 10 hours to restore a single VMDK just to the Media Agent (as we are eliminating the overhead from VMware at the moment) to the high-speed disks on a Windows Server 2022 MA.  These are brand-new and before with Windows Server 2012, we didn't have any issues.  It seems that we are getting extremely slow READ performance when going back to the ExaGrid.  All backup jobs seem to work fine - we even moved the ExaGrid nodes to the same VLAN as the MAs to eliminate any network issues - but please keep in mind we are using Cisco ACI so everything is software-defined.  Moving them to the same VLAN actually DECREASED backup performance by 30% - we know this from using iPerf and TCP dumps.  Setup:  ** 4 x MAs - all running Windows Server 2022 with separate physical volumes for the DDBs and Indexes.  ** The DDBs are partitioned

673
S
Byte
W
Bit
wb3jmaBit
asked in Storage and Deduplication
Amount of Space Needed for Dash Copy Backups Using Front End Capacity and Usage Reports

The stuff in the Deduplication documentation does not really make clear what we may need. We had Dash Copies a couple years ago and ran out of space then we migrated our backups to Hyperscale-X. Now that we are getting ready to setup Dash Copy work again need to get at least idea of what we need space wise as a best practice. BTW were on Prem not the CLOUD.

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Vaulter
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