What also is a possibility to get info on the power needed is going to System Info (About this mac/ System info/Hardware/USB) while the T7 is connected to the mini. But as he uses it to backup multiple MacBooks it’s likely larger than 500 GB. I read this thread back to see if Neil mentioned the size of the T7, but found nothing. Most likely extra memory chips require more power. Probably Samsung leaves all other components the same on all three models and adds only extra memory. The T7 comes in three sizes, 500 GB, 1 TB and 2 TB. Thanks for testing, good to know both situations work. It boots fine from the T7 directly connected to the computer port and also from a USB 3 hub (Insignia). I can boot from these drives, but that doesn’t mean anything because these drives have their own AC power supplies. My Mac (2018 mini) has an Anker 10-port hub which is used for many devices, including my backup drives. It’s definitely worth trying a powered hub, if you have one. But that power mode may not be available before macOS starts running.īut the fact that the drive appears as a boot device when you hold down option, seems to indicate that this isn’t the case either. The only explanation I can think of is that Apple’s USB-A ports have a proprietary high-power mode (used for the SuperDrive), which might also be able to power the T7. The strange thing is that the drive seems to work OK as long as you’re not booting it. In other words, the T5 may be able to draw the power it requires from a USB 3 port (0.8A is less than 0.9A), but the T7 may not be able to get what it needs unless it is plugged in to a USB-C port.Ī 2014 Mac mini doesn’t have any USB-C ports, so there may be problems if the driver requires more than 0.9A of current. Any additional power requires implementation of either the battery charging spec (which, I believe, can’t be used simultaneously with moving data) or the power delivery spec over USB-C. The USB 2.0 spec allows up to 0.5A for a high-power device. The 5 Volt is logical (USB standard), but the T7 power draw is potentially larger than the T5s. To explain my earlier answer in this thread: The Samsung User manual for those SSD’s rate the T5 as “5 Volts, 0.8 Ampere”, and the T7 as “5 Volts, 1.5 Ampere”.
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