Disk usage growing

[kubimike]

Hello all, months ago all of my jobs have hit their retention periods and they've been deleting backups that have expired. I've noticed that the used disk space is still growing. Now I realize deleting 5TB is not going to free 5TBs because of block cloning. I guess any new data along the way from new backups could cause the disk space usage to go up. I just didn't predict it to happen that quickly. Perhaps ReFS isn't releasing the disk space either

[tsightler]

What backup mode are you using? Is it something with periodic synthetic fulls? If not, you need to schedule a compact operation to free blocks that are perhaps no longer used at all, but still referenced by the VBK. The compact will still use fastclone, but will simply no longer reference any unused blocks so that they can be freed by ReFS. If you're talking about GFS, or other modes with synthetic fulls, blocks will be released by ReFS only once they are no longer referenced by any file.

[kubimike]

daily incremental w/daily synthetic fulls. .. No GFS . So youre saying Ill need to use the compact feature in 'storage' - 'advanced' - 'Maintenance' Tab ?

[foggy]

If you have periodic synthetic fulls enabled, unreferenced blocks should be release anyway. Feel free to contact support for a closer look.