Storage and Deduplication

In the Commvault “public cloud architecture guide for amazon web services” is a note about using only a single mount path when using AWS S3:Do not create multiple mount paths to generate additional Amazon S3 performance, Amazon S3 increased request rate enhancements have removed the need to randomize object prefixes to achieve faster performance with S3.But my question is: what’s the recommended mount path count when using an on-prem S3 Storage system as library in Commvault? The vendor of the storage does not care. They say they can handle one single bucket in one single mount path and scale unlimited. But what about Commvault?

Hello everyone!I've configured a File Server with a Data Drive and a System State Backup. I'm a little perplexed when I look at the AUX copy history because of the following numbers. For your convenience, I've attached a sample AUX copy behavior.Commvault is not copying data based on date and is jumping back and forth in time.I couldn't find any sort of prioritization system based on the date, backup type, or content.Can anyone describe how Commvault prioritizes data for secondary copies and how that priority can be changed?Is it possible to define a client-based priority for Aux copy? Thanks in Advance,Manikandan

I’m currently performing backups of Azure Fileshare for a subscription using Commvault. The backup is being performed in one Azure region and customer wants to restore the Azure Fileshare to another region.  What do I need to do perform that type of restore in Commvault?

A customer of ours intends to move their Azure workload to Metallic in the near future.Because we don't manage the azure side of things for the customer, I assumed that the Azure blob storage was a combined tier based on what was configured in Commvault (screenshot below). The cloud libraries are configured in Commvault to use a Combined Tier of storage where we write metadata to Hot and chunk data to Archive tier. Based on that I’d suggested that a rehydration of data is needed from Archive tier to hot tier to perform an Auxcopy to Metallic or lodge a ticket with Microsoft to have the entire contents of the blob converted to Hot tier so that it can be read by the AuxCopy process.  

Hi, I have few question about deduplication. I will be very appreciate for help:how to backup servers with enabled deduplication - some special tips how to recover files from volumes with deduplication enabled is the option of data backup on such servers with the use of an installed agent recommended / not recommended, how does it affect the backup speed, why Commvault is not able to recover data from disks after deduplication, maybe something else needs to be configured?Thanks for help!

Hello!! I want to Aux copy ( Virtual Tape Libary → S3) but, The error occurred as follows.The error occurred twice.Occurred at 2.8TB(Total capacity 3.2) It worked well, but suddenly it didn't work.

Yesterday our environment did an automatic upgrade from 11.20.xx to 11.24.29.Previously I have had absolutely zero issues with data verification and backups and aux copies and all jobs show as passing data verification.Now I’m seeing errors/issues on aux copies and data verification along the lines of:Failed to process chunk [2840311] in media [V_98073], at the time of error in library [Disk Library] and mount path [[ma02] C:\Mount\maglib04], for storage policy [Backup to Disk] copy [Primary] MediaAgent []: Data read from media appears to be invalid..We’re using global dedupe and lots of synthetic full backups so I’m trying a proper full backup on a problem job to see what happens.Before I raise with support does anyone have any suggestions or thoughts please?This is a Windows MA environment where there have been zero issues this literally started to happen after the 11.24.29 install.Obviously this doesn’t seem

Hi Commvault Community, Just wondering if the Media Agent in Commvault uses a specific database ? Since the CommServ uses SQL DB for its metadata, I was wondering if the MA uses certain DB for DDB or Index Cache or anything else.

We  have 2 Synology 24TB storage libraries, one for the primary and the other at another site for the AuxCopy.The primary has Free Space 15.34TB, Size on Disk 8.59TB, Total Application Size 30.5TB.The AuxCopy has Free Space 3.62TB, Size on Disk 20.33TB, Total Application Size 30.33TB Shouldn’t the AuxCopy be an exact replica of the Primary?  Why would it be larger? Thanks for any suggestions.Larry

Hi everyone This is my first post. I was trying to restore some files I lost from an earlier backup. I could view the files and folders. I selected the copy precedence to be 1 (my primary copy)However, whenever the operation starts, it gives the error “Failed to read media during restore” and stops at 5%Everything seems fine. Until I tried to skip the errors, and I find out that the folders are restored, but no files in them.Please help out. Is there something in the settings I have to change?

Hi Community ,We are using disk library as our Primary Backup Storage  . We would like to configure immutable secondary DASH copy on Pure Flash Blade . I would like to understand -- Can i create a disk library from Pure Flash Blade with hardware immutability ? Can i use Pure Flash Blade array to create a DASH Aux copy with source as disk library primary copy to target as library created from Pure Flash Blade . Backups are Streaming & VSA , not IntelliSnap .  As per the CV documentation and videos , i see that Pure is only configured as Primary backup storage with IntelliSnap backups . Can we use it as backup library target for aux copies ? 

Hi, I try to run a data verification but the job take this error:Error Code: [13:138] Description: Error occurred while processing chunk [7670174] in media [V_], at the time of error in library [LibStorage] and mount path [[LibStorage] R:\], for storage policy [SP_BackupSystem] copy [Aux_Disk] MediaAgent []: Backup job []. Mount path inaccessible. Source: , Process: AuxCopyMgr  

Hello,I need a little clarification about long running Auxiliary Copies.On a daily basis we run a Primary Copy schedule which is followed by three auxiliary copies. Quite often the auxiliaries take a very long time to complete, enough to overlap with the primary copy schedule of the following day. This makes the jobs on day 2 to “enter” the still running auxiliary copies from day 1, is there any way to avoid this? Is it possible to set a boundary on the latest job to be included in an auxiliary copy?To my understanding, the Copy Policy->Backup Period->End Time setting cannot be used as it would provide a fixed date rather than a moving one.Sorry if this sounds a bit dummy and thanks for you supportGaetano

I want to move jobs from disk to tape, when I run the auxiliary copy it gives me an error when it finds a CHUNK and some of the jobs are marked as bad, try to mark them as good and it gives me the following error "the selectted job cannont be marked good , since it has been marked bad by the system during a read operations"Already validate at the Operating System level that the CHUNKs are in the corresponding route.If I try to view the backup data for those bad jobs through a restore I can view and navigate to the file to restore Is there any way to recover the good status of the jobs?

Tapes are not write protected physically but commvault shows the tapes are bad and write protected for all the new tapes. any suggestion on this? 

Hi all If I can just confirm something that I think makes sense.In my case, I have a Media Agent that only backed itself up and hosted it’s own DDB.This client no longer backs itself up. It’s retentions have all been met and no data resides on the Storage Policy or the DDB.I want to remove the alert in the Command Centre that notifies me the DDB isn’t being backed up.If I understand correctly, I just do the below in this order: Retire DDB using the ddb_sealing.xml Delete Storage Policy Delete Media Agent and associated Library? Thanks.Mauro 

Hello All,I have to replicate the S3 cloud library (backed up data) to another S3 bucket in different region which can be achieved by Configuring Replication for Cloud Storage (https://documentation.commvault.com/11.25/expert/9279_configuring_replication_for_cloud_storage.html) Although I need a clarity on how it works.Step 1: As per my understanding I have to create two buckets with versioning enabled on it and I should configure two cloud libraries accessible by each media agent specific to the region where S3 is hosted.Step 2: We need to request the AWS admins to use the native replication to copy the backed up data to new S3. Post copy, we can use another media agent to read and restore the data using commvault.Am I correct with my understanding?Also documentation says an addit

Hello All,I have a S3 bucket with object lock enabled and WORM mode is enabled on this storage using the workflow. May I use this WORM mode enabled copy as source copy for another aux copy target?RegardsAnanth

Hi Commvault Community, i would like to see, if anyone else is facing the same Issue. We have a few customer that are still using Tapes to move weekly/monthy Backups to a save location.With the change to “forever incremental” they are now facing a big issue to collect all the backups of the agent on to the exported tape. There is no process to generate a Synth. Full or everything likewise.One customer is still holding on to the “old” exchange one-pass classic agent, so he don’t lose the Synth Full Options.Another customer is manually creating a new Storage Policy Copy every month to get all the Backups on the same tape.We have shared this problem a few months ago, we even had a talk at the GO 2019 with dev. Back then we there told there will be a solution on its way, we could expect it for SP20. Now we are at SP26 and there is still no option for these customer.

Getting the following when CommVault attempts to reconstruct the DDB  User: Administrator Job ID: 353464 Status: Failed Storage Policy Name: BTR_Global_Dedupe Copy Name: BTR_Global_Dedupe_Primary Start Time: Sun Nov 28 17:33:46 2021 End Time: Tue Nov 30 03:45:22 2021 Error Code: [62:2035] Failure Reason: One or more partitions of the active DDB for the storage policy copy is not available to use.

Hello team, I noticed two sealed DDBs have a space warning under DDB disk space Utilization section in webconsole health report.We have a long term retention for mailbox backup that prevent DDB store from reclaim   I’m looking to see if there is a way to exclude sealed DDB from the DDB disk space utilization /strike count (I have search CV bol but it doesn’t bring any search result)Or i’ll need to contact support to manually free up sealed ddb space. Do need upload CS DB for CV staging ? thank you

Hello everyone,i want to ask about commvault backup, can commvault backup to disk and cloud at the same time? thanks,Nis 

Hello Team,Pls am having issue adding adition tape drive of LTO 5 with other LTO 7,8i try to add it from the expert storage still it cannot discover the LTO 5 driver pls help as i hv LTO 5 tape in media to copy.Thanks.

Can we use PowerPath from EMC on the Hyperscale appliances? 

Hello Commvault Community! I would like to ask you if there is any option to do a "tape mirror". I mean 1:1 copying the data from one tape to another, but keeping the data on both tapes. I am aware that there is a "Tape to tape copy" option, but if I understand correctly it deletes the data from the source tape and copies it to the new one available in Spare Media. The reason why the customer wants two copies of the data on two different copies is the security rules of their company, where they must have one tape in the safe and the other in the active Tape Library. I suggested to make another copy in Storage Policy backup to tape with the source copy from disk, but then we can't be sure that the tapes will be 1:1. Is there any chance we can make a tape mirror? Move Contents of Media from One Tape to Another