3 ms·

Is there something different about the drives on non-M1 Macs? My MBP 16 is showing way more read/write than that and still zero percent used. SMART/Health In

Is there something different about the drives on non-M1 Macs? My MBP 16 is showing way more read/write than that and still zero percent used. SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 36 Celsius Available Spare: 100% Available Spare Threshold: 99% Percentage Used: 0% Data Units Read: 108,058,416 [55.3 TB] Data Units Written: 95,524,343 [48.9 TB] Host Read Commands: 1,004,502,098 Host Write Commands: 558,965,971 Power Cycles: 155 Power On Hours: 644 Unsafe Shutdowns: 36

ddoeth 6y ago
My 2016 MPB is also at around those R/W numbers but a bit higher in the used area. I am however not sure what those Power On Hours are refering to, since I have been using this machine daily for many hours. SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 37 Celsius Available Spare: 87% Available Spare Threshold: 2% Percentage Used: 5% Data Units Read: 98,665,764 [50.5 TB] Data Units Written: 84,525,474 [43.2 TB] Host Read Commands: 980,835,796 Host Write Commands: 811,309,011 Controller Busy Time: 0 Power Cycles: 14,955 Power On Hours: 359 Unsafe Shutdowns: 21 Media and Data Integrity Errors: 0 Error Information Log Entries: 0
- maxerickson 6y ago
  It's been ~1700 days since mid 2016, I would guess the power cycles value there is swapped with the power on hours. Or you power cycle 10 times almost every day.
  - wtallis 6y ago
    The SSD will experience a power cycle every time you close the lid and the laptop goes to sleep.

ddoeth 6y ago

My 2016 MPB is also at around those R/W numbers but a bit higher in the used area. I am however not sure what those Power On Hours are refering to, since I have been using this machine daily for many hours. SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 37 Celsius Available Spare: 87% Available Spare Threshold: 2% Percentage Used: 5% Data Units Read: 98,665,764 [50.5 TB] Data Units Written: 84,525,474 [43.2 TB] Host Read Commands: 980,835,796 Host Write Commands: 811,309,011 Controller Busy Time: 0 Power Cycles: 14,955 Power On Hours: 359 Unsafe Shutdowns: 21 Media and Data Integrity Errors: 0 Error Information Log Entries: 0

maxerickson 6y ago
It's been ~1700 days since mid 2016, I would guess the power cycles value there is swapped with the power on hours. Or you power cycle 10 times almost every day.
- wtallis 6y ago
  The SSD will experience a power cycle every time you close the lid and the laptop goes to sleep.