Good morning all,

 

In the past, I used to backup my main PC workstation with Veeam Agent for Windows. Been using this solution for years now, however I was previously backing up to a QNAP with a RAID5 array. The file system had 8TB usable, and was a single large filesystem. 

 

My backup job is backing up 2 nvme's on my main PC, so each .vbk full backup file can grow to upwards of 1TB. 

 

Last night's test, anticipating it would start writing to the array after the minimum free space hit, however the .vbk file is a single file on disk that was almost 1TB:

• Context: "backups" share minimum free space = 80 GB
• Backup to "backups" share, with my "sharecache" as primary storage, and array as secondary
• This filled up my SSD cache, and mover has been running, but showing no progress as far as freeing up used space on the "sharecache"
   

^^^ Result of this test

 

^^ Free disk space in xfs array

 

If I was to simply eliminate the sharecache as the primary storage and backup directly to the array, how exactly would this work with .vbk files that are almost as large as the individual disks in the array? I suspect I'd have to have drives that are large enough, and have enough available space to fit a single .vbk before it can utilize high water to write to an additional disk. 

 

Just trying to figure out the best way to do this - but I'm thinking I may be better off backing up with Veeam to my UNAS Pro as that's raid 10 currently. But, I love UnRAID and would rather use that to backup to.

 

Thanks in advance

Edited January 29, 20251 yr by tslamars

1 hour ago, tslamars said:

I suspect I'd have to have drives that are large enough, and have enough available space to fit a single .vbk before it can utilize high water to write to an additional disk. 

Correct, one file cannot span multiple array disks, since they are independent filesystems.

5 minutes ago, JorgeB said:

Correct, one file cannot span multiple array disks, since they are independent filesystems.

Thought so. Thank you for your time.