Force 4k format?

[kspare]

I have all my p3700's set with 4k LBA, but with the rms-200 it ha a 512byte lba. i'm not sure how to format it with a 4k lba, but is there a way to force it to use 4k?

i'm using 2 of these for my log drives, so i assume it would have to be done on the creation of the log vdev?

maybe i'm just out to lunch.....

 

[Ericloewe]

It may be impossible to configure the device for anything other than 512-byte sectors. Not that it's a big deal, the P3700 supports 4k blocks as an optimization, but it's still an abstraction (NAND gets erased in blocks of multiple MB, typically). For a DRAM-based device, it's going to make very little difference, if the embedded processor can keep up with 512-byte blocks. You might gain a little bit of performance on the card and a little bit of performance on the host, but it's going to be a smaller gap than what you'd see with flash, which has to worry about write amplification, garbage collection, wear leveling, etc.