You were talking about reads and I responded about reads.
I'll repeat my claim: SSDs largely behave as random access devices for page-aligned random reads of an integer multiple of pages. In particular, without any performance footguns activated in the application & OS stack, you can get a substantial portion or all the throughput with such a random read workload compared to the most sequential read workload you can imagine.
This is totally unlike disks (resp. tapes) where you have the hard physical reality of average seek time in the milliseconds (resp. seconds) making random read loads orders of magnitude slower (resp. even more orders) than sequential ones.
Writes are different and more complicated, but they also behave as random write devices if you choose your granularity to be "block size" and even at page size (if you can avoid write amplification, which is not always possible).
You have page and block reversed in your description: a page is smaller than and contained within a block.
SSDs to do not "open a block, overwrite a page and then seal the block": they write newly written pages to a freshly erased block, using a variety of possible strategies, which sometimes give an advantage to nearby-in-time writes to the same block or sometimes not.
I'll repeat my claim: SSDs largely behave as random access devices for page-aligned random reads of an integer multiple of pages. In particular, without any performance footguns activated in the application & OS stack, you can get a substantial portion or all the throughput with such a random read workload compared to the most sequential read workload you can imagine.
This is totally unlike disks (resp. tapes) where you have the hard physical reality of average seek time in the milliseconds (resp. seconds) making random read loads orders of magnitude slower (resp. even more orders) than sequential ones.
Writes are different and more complicated, but they also behave as random write devices if you choose your granularity to be "block size" and even at page size (if you can avoid write amplification, which is not always possible).
You have page and block reversed in your description: a page is smaller than and contained within a block.
SSDs to do not "open a block, overwrite a page and then seal the block": they write newly written pages to a freshly erased block, using a variety of possible strategies, which sometimes give an advantage to nearby-in-time writes to the same block or sometimes not.