Originally Posted by okp11
The place where the drive was manufactured doesn't seem to have any bearing on what type of NAND it has. I've had dozens of people send me their benchmarks for the drive and plenty of the synchronous and asynchronous drives were made in both China and Taiwan.
The way the numbering scheme works is The v505A, v505B, v505C, v507, and v520 are all synchronous. The v506 and v521 are both asynchronous.
As for whether synchronous drives are still manufactured I would wager yes. The v505C and v507 seem to have just recently surfaced and both are synchronous.
I was quoting the earlier information based on user posts about where the async NAND versions of the V300 came from, or could be identified as async by the manufacturing location. I should have known it was not that simple, either China or Taiwan. That myth needed to be cleared up, great information.
The numbers you listed are the firmware versions that come with the V300 from the factory, or something else? They seem to be firmware versions.
The correlation between the firmware version and type of NAND used in a V300 is interesting, but must be just coincidental. It seems the firmware version number corresponds to a specific production run of V300s, if the async versions are isolated to only 506 and 521.
The latest firmware update for the V300 has this table in its firmware update procedure guide:
So several firmware versions were used but all were not available to the public. We also see that the firmware is not different between async and sync versions.
Once the firmware is updated to 525, you can't tell what type you have, except by the benchmark results.
Given all the production runs that seem to exist from the firmware versions you listed, talk about the luck of the draw about which version a buyer would get. IMO, the mixing of async and sync versions being sold is in a sense worse than changing to async and staying that way. Does the price of the V300 fluctuate with the type of NAND used? Or is changing to async for some production runs a method of keeping the price more constant, given changes in NAND cost?