According to DailyTech, Samsung’s 32nm NAND Flash currently gives write speeds that are so slow that SSD manufacturers are unable to use them in their SSDs. According to the same source, Toshiba also had problems with write speeds on its 32 nm chips initially, but these problems have mostly been resolved.

These chips are nevertheless being sold in the embedded market, for Netbooks and with a max of 70 MB/s for writes. In July Intel launched its X25-M “Postville” based on 34nm NAND produced in partnership with Micron. Here again, the sequential speeds are far from exceptional with writes at 70 MB/s, but this is compensated by very good random writes.
Samsung is the major producer of Flash memory worldwide and the current situation could prove problematic if it continues. Moving over to 32nm chips is a prerequisite for new SSD price cuts.