So, I have two identical SSDs (crucial mx500 1TB SATA). I used one to install win10, while the second one was never used. I've put them both into my ubuntu server box and as I ran fdisk and lsblk I noticed that one device is reporting 512/512 for logical/physical sector size (which is also used for minimal/optimal IO size), while second is reporting 512/4096. /dev/sda === START OF INFORMATION SECTION === Model Family: Crucial/Micron BX/MX1/2/3/500, M5/600, 1100 SSDs Device Model: CT1000MX500SSD1 Serial Number: 2103E4E9079B LU WWN Device Id: 5 00a075 1e4e9079b Firmware Version: M3CR033 User Capacity: 1,000,204,886,016 bytes [1.00 TB] Sector Size: 512 bytes logical/physical Rotation Rate: Solid State Device Form Factor: 2.5 inches Device is: In smartctl database [for details use: -P show] ATA Version is: ACS-3 T13/2161-D revision 5 SATA Version is: SATA 3.3, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Tue Oct 5 11:15:16 2021 UTC SMART support is: Available - device has SMART capability. SMART support is: Enabled /dev/sdb === START OF INFORMATION SECTION === Model Family: Crucial/Micron BX/MX1/2/3/500, M5/600, 1100 SSDs Device Model: CT1000MX500SSD1 Serial Number: 2103E4E8F7C9 LU WWN Device Id: 5 00a075 1e4e8f7c9 Firmware Version: M3CR033 User Capacity: 1,000,204,886,016 bytes [1.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: Solid State Device Form Factor: 2.5 inches Device is: In smartctl database [for details use: -P show] ATA Version is: ACS-3 T13/2161-D revision 5 SATA Version is: SATA 3.3, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Tue Oct 5 11:15:37 2021 UTC SMART support is: Available - device has SMART capability. SMART support is: Enabled I plan to use them for lvm in raid1 setup. Will this cause any issues? I keep reading that physical sector size is fixed and cannot be changed, but then I found that some vendors (like intel) have tools to change sector size. Did windows installation do this?