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After compression, each block backed up by Veeam will have somewhere between 0-4K of overhead when stored on ReFS with 4K clusters, and ...

20.03.2017 · When creating ReFS volume, it is important to choose 64K as allocation unit size as picking up the default 4k brought problems with memory usage (apparently resolved with the latest Microsoft March 2017 patches pack, but still apparently breaking another feature….. Hyper-V …

I've looked at the documentation and it says to use 64KB block size for the ReFS volume and to ensure Windows is kept up to date of course.

Apr 10, 2019 · First published on TECHNET on Jan 13, 2017. Microsoft’s file systems organize storage devices based on cluster size. Also known as the allocation unit size, cluster size represents the smallest amount of disk space that can be allocated to hold a file. Because ReFS and NTFS don’t reference files at a byte granularity, the cluster size is the smallest unit of size that each file system can reference when accessing storage.

The Veeam block size of 512KB is going to be written in the underlying filesytem, which has a block size of 64k. It means that one block will consume 8 blocks ...

While Microsoft currently recommends formatting ReFS volumes with the default 4k clusters, Veeam on the other hand, recommends using 64K cluster ...

Dec 04, 2019 · To view the specific ReFS info on this drive, we can run the following line. fsutil fsinfo refsinfo E: Take a look at value for the “Bytes Per Cluster”, this is where we can see that when this drive was formatted, it’s allocation unit size was set to 65k. 65k is also the recommended setting for Veeam destinations if you are using ReFS.

May 17, 2010 · The ReFS is formatted with 4k cluster size as that is what was recommended to me previously, but I see current recommendation now seems to be 64k which is slightly annoying as the volumes are now setup. We are using Veeam 9.5 and the Veeam server and Repo are the same server which is running Server 2016.

The file system on the specified volume does not support fast cloning. We recommend using ReFS volume formatted with 64 KB cluster size. Proceed anyway?

ReFS BlockClone API, veeam has developed Fast Clone, a fast, efficient storage backup ... The default allocation unit size for clusters in ReFS is 4K.

64K block sizes are already largely recommended as a best practice for Veeam repositories, considering how Veeam works with large files. The ...

29.01.2021 · tells me 256kb or greater. I bought a S3260 with 56 8 TB Disks. So my thoughts were: 1x Raid 60 as recommended in the Deployment Guide. ReFS Target with 64 kb. 512kb Stripe Size. My Jobs uses mostly reverse increments. The goal of the Stripe Size should be performance over space efficiency.

16.05.2010 · Re: 2016 ReFS and file allocation size. This is true if compression is turned off. If it's on, the original block is 1MB, but it then becomes anything between 1MB (uncompressable block) and any lower value. Say I have after compression a file that is 644k, this consumes 10 * 64k blocks plus a 4k space.

24.01.2017 · ReFS 3.1 in fact supports two different cluster sizes: 4KB and 64KB. Too long, don’t read: go for 64KB whenever you want to use ReFS as a Veeam repository. If you also want to know why we are suggesting this cluster size, and how …

04.12.2019 · To view the specific ReFS info on this drive, we can run the following line. fsutil fsinfo refsinfo E: Take a look at value for the “Bytes Per Cluster”, this is where we can see that when this drive was formatted, it’s allocation unit size was set to 65k. 65k is also the recommended setting for Veeam destinations if you are using ReFS.

Jun 29, 2017 · When creating ReFS volume, it is important to choose 64K as allocation unit size as picking up the default 4k brought problems with memory usage (apparently resolved with the latest Microsoft March 2017 patches pack, but still apparently breaking another feature….. Hyper-V backup.).

Jan 24, 2017 · Microsoft has just posted a new blog article on Technet: Cluster size recommendations for ReFS and NTFS, to answer the same question, but as much as they are suggesting to use 4KB (it’s in fact the default cluster size when a new volume is formatted), there are a couple of notes in the same article that tells you that 64KB may be even better for backups. The use cases they list are not really comparable to a Veeam backup repository, while the phrase “64KB clusters are applicable when ...