Cloned drive shows less storage used than source drive?

[SPNarwhal]

Not sure if this is the area to post this in, seeing as it's a general storage question and not iMac specific.. but I did do it on an iMac!

Anywho:

I have an 8TB drive that I cloned (Carbon Copy Cloner) to a 10tb drive.

8TB drive says 7.85TB used, while the 10tb says 7.6TB used.
Both are the same format (HFS+)

I'm 99% sure I don't have much to worry about and that drive estimates are sometimes a little wonky, but figured I'd ask about it before I go and wipe the 8TB drive.

Any idea why it does this?

 

[Fishrrman]

It may be due to the different sizes of the drives.
I wouldn't worry about it.

 

[SPNarwhal]

It may be due to the different sizes of the drives.
I wouldn't worry about it.

That's what I figured. I've seen that happen in the past.
Just figured I'd check in since this drive is a hub for all of my files, so didn't want to wipe the original on a whim.

Thanks. !

 

[wardie]

CCC has an option to save files in the backed up drive that may have otherwise been deleted on a refreshed clone backup. The idea being to help you not lose something you didn’t mean to delete from the original drive. I’ve forgotten what the folder name it creates is called, but its an option in the backup settings. That would mean the backup disk used gets gradually bigger than the current original.

 

[SPNarwhal]

CCC has an option to save files in the backed up drive that may have otherwise been deleted on a refreshed clone backup. The idea being to help you not lose something you didn’t mean to delete from the original drive. I’ve forgotten what the folder name it creates is called, but its an option in the backup settings. That would mean the backup disk used gets gradually bigger than the current original.

Are you sure? There’s a safety net option but it’s for the destination drive, not the source. It holds files in there as long as it can until space is needed for the new data coming in. I didn’t see any options for saving any files from the source drive. It only gave me the option of “all files” or “some files”

 

[wardie]

Are you sure? There’s a safety net option but it’s for the destination drive, not the source. It holds files in there as long as it can until space is needed for the new data coming in. I didn’t see any options for saving any files from the source drive. It only gave me the option of “all files” or “some files”

Sorry i thought you meant the destination drive was filling up faster.

 

[SPNarwhal]

Sorry i thought you meant the destination drive was filling up faster.

Ah! Yeah. If I had /more/ space used on the destination than the source I wouldn't be all too concerned since I'd feel safe knowing all my files were there. (and then some)--- was concerned because the destination drive showed LESS space used than the source.

 

[wardie]

Ah! Yeah. If I had /more/ space used on the destination than the source I wouldn't be all too concerned since I'd feel safe knowing all my files were there. (and then some)--- was concerned because the destination drive showed LESS space used than the source.

Could it be some of the hidden system files that are intentionally not being replicated over eg snapshots.

 

[SPNarwhal]

Could it be some of the hidden system files that are intentionally not being replicated over eg snapshots.

I doubt it only because the drive was purely just a hub for all of my files to get dumped to, so it was never really an active drive; was only used one time in order to consolidate multiple smaller drives.

I'm sure it's all fine, though. I wouldn't be surprised if just the size of the drive makes the read on it a little wonky since it's a decent sized drive.