I checked my settings and I've got it set to Smart Update. Note that SMR drives will write very quickly the first time, but every subsequent write that replaces data on the drive will be very very slow. And if you do something that changes the directory structure, you need to make those same changes to the backup drive or you will wind up copying folders that contain unmodified files. SMR drives should not be used for backup of data that might change substantially. I would monitor the speed of a straight copy to the backup drive.Īlso, check if your backup drive is an SMR (shingled magnetic recording) or CMR (conventional magnetic recording). It should be very fast, but that depends upon what you interface is.īe sure you aren't connected to a USB 2 port. Use Activity Monitor to monitor the write speed of the backup. If your setting somehow got changed to "Erase Backup, then copy", that might explain why your backups are now taking so long. (It deletes files that are no longer on the source volume, and copies files that have changed.) The "Smart Update" tries to get to the same end state, but more efficiently. The "Erase Backup, then copy files" option does a full backup each and every time. What do you have selected in the SuperDuper "Options…" for "During copy"? The user manual (see link on product page) says there are four choices. This is kind of hard to explain, but wondering if anyone out there knows what I'm talking about and has experienced this. It used to take only a few minutes to mirror a drive, but now it's taking like 7 hours, when both drives have exactly the same files on them except for just the newest images that I'm trying to back up. It used to work really fast as it would only copy files that weren't already on the backup drive, but now when I go to copy a drive, it is basically copying the entire drive. I have a main drive that I place all the files from a new shoot, then I use Superduper to copy that drive to my drive #2 and then to a third drive. I've been using Superduper for years to back up all of my external hard drives.
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