Comment by wtallis
2 years ago
If a logical block address is not mapped to any physical flash memory addresses, then the SSD can return zeros for a read request immediately, without touching the flash.
2 years ago
If a logical block address is not mapped to any physical flash memory addresses, then the SSD can return zeros for a read request immediately, without touching the flash.
Does the mapping happen on first write? Is TRIM then a command that signals the SSD to unmap that block?
Yes.