These blocks of 256 bytes most probably are stored in wear-leveling database of some sort hidden inside NVME. These databases are often LSM-tree-based. So, writ

These blocks of 256 bytes most probably are stored in wear-leveling database of some sort hidden inside NVME. These databases are often LSM-tree-based. So, writing larger blocks still has benefits, especially when you use compression. If you think you only need 256 byte pages, average price for 10G hard disk drive is ~$300 [1] and average price for 2G SSD drive is also ~$300 [2]. [1] https://pcpartpicker.com/trends/internal-hard-drive/?__cf_chl_jschl_tk__=eb7d19a0fee0bae06773db51e2c24a49f42029c3-1611596989-0-Adt7I3palOe6T-fvjO6FGFk_pRP00ftthDItecT3JfzPGiQ6CuX-Hfa2JO6g_EKqbCnhalJe3Gt1Pm7IJ7erKPDnlDBr6q_0Ms3wwqQ5DHDSJlIfxr9bn6QkzIZ-aYwpf8MM1M3Vwodn4nHYJLrmhTgQt1Z9-ucN8O_wO1WH1LldGQJHiJczZ2M4hzr8jNn1S2XRQ4VHL7QVc90F5tujaUVKKugPerNYyUJPaF-TdnyuA_WYHBp8BomZy8xwmEPHaAq_cBGxHrISynx9gdIW9Xb2-hxVpy8i3251obIYBMQcFSWihe4NfSUt8b_-6zLzBWfuLMkXpTz_qWS5NT_7r7QoMwf8KoJGYj6zKKYYQUmekyRk6nqTsd-oG6mU47co4GR57lLLjX2hlgVVnz6vGok#storage.hdd350.12000 https://pcpartpicker.com/trends/internal-hard-drive/?__cf_ch... [2] https://pcpartpicker.com/trends/internal-hard-drive/?__cf_chl_jschl_tk__=eb7d19a0fee0bae06773db51e2c24a49f42029c3-1611596989-0-Adt7I3palOe6T-fvjO6FGFk_pRP00ftthDItecT3JfzPGiQ6CuX-Hfa2JO6g_EKqbCnhalJe3Gt1Pm7IJ7erKPDnlDBr6q_0Ms3wwqQ5DHDSJlIfxr9bn6QkzIZ-aYwpf8MM1M3Vwodn4nHYJLrmhTgQt1Z9-ucN8O_wO1WH1LldGQJHiJczZ2M4hzr8jNn1S2XRQ4VHL7QVc90F5tujaUVKKugPerNYyUJPaF-TdnyuA_WYHBp8BomZy8xwmEPHaAq_cBGxHrISynx9gdIW9Xb2-hxVpy8i3251obIYBMQcFSWihe4NfSUt8b_-6zLzBWfuLMkXpTz_qWS5NT_7r7QoMwf8KoJGYj6zKKYYQUmekyRk6nqTsd-oG6mU47co4GR57lLLjX2hlgVVnz6vGok#storage.ssdm2nvme.2000 https://pcpartpicker.com/trends/internal-hard-drive/?__cf_ch... Five times price/Gb difference. If you need large storage, you need hard disks. B-trees are good with hard disks, is PGM index good with them too?