This old alignment usually only reduces performance on a 4k sector HDD.
Here is output from topic starter's fdisk:
===
Disk /dev/sda: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Device Boot Start End Sectors Size Id Type
/dev/sda1 63 1953520456 1953520394 931.5G 7 HPFS/NTFS/exFAT
===
>4096
>63
It seems that we have an unaligned advanced format here, isn't it?