I recently researched why my old macmini's Fusion drive broke.
From SSD's (used it in 2017-2019) SMART:
Meaning 111TB or 177TB of writing in that ssd.
It's SanDisk SD8SB8U128G1122 with TBW of 72.
No wonder that it broke. Used 10.12 Sierra with that installation.
Then I checked my old mbp.
Current Fusion drive in use from 2014.
That probably means 233TB of NAND writes!
It's KINGSTON SV300S37A120G with TBW of 64, but it still shows 38% life left!
Seems to be, that the "Swapping scandal" 2 years ago was just the tip of old iceberg.
Haven't done anything special with those macs, mbp was in constant use in 2014-2016, but after that very light use.
I'd be very interested to see, especially old Fusion drives ssd wear with older macOD versions.
Also would be interesting to see if there's any difference with later macOS versions.
From SSD's (used it in 2017-2019) SMART:
Code:
9 Power_On_Hours 0x0032 100 100 --- Old_age Always - 9872
233 Total_NAND_Writes_GiB 0x0032 100 100 --- Old_age Always - 111692
234 Perc_Write/Erase_Ct_BC 0x0032 100 100 --- Old_age Always - 177455
Meaning 111TB or 177TB of writing in that ssd.
It's SanDisk SD8SB8U128G1122 with TBW of 72.
No wonder that it broke. Used 10.12 Sierra with that installation.
Then I checked my old mbp.
Current Fusion drive in use from 2014.
Code:
9 Power_On_Hours_and_Msec 0x0032 079 079 000 Old_age Always - 18946h+18m+30.970s
233 SandForce_Internal 0x0032 000 000 000 Old_age Always - 232691
234 SandForce_Internal 0x0032 000 000 000 Old_age Always - 191868
241 Lifetime_Writes_GiB 0x0032 000 000 000 Old_age Always - 191868
That probably means 233TB of NAND writes!
It's KINGSTON SV300S37A120G with TBW of 64, but it still shows 38% life left!
Seems to be, that the "Swapping scandal" 2 years ago was just the tip of old iceberg.
Haven't done anything special with those macs, mbp was in constant use in 2014-2016, but after that very light use.
I'd be very interested to see, especially old Fusion drives ssd wear with older macOD versions.
Also would be interesting to see if there's any difference with later macOS versions.