Skillnad mellan OCZ Vertex 2 och Vertex 2 E ???

Vertex 2 är en välkänd familj SSD-enheter i prestandaklassen. Bland specifikationerna syns Sandforce SF-1200, 64 MB buffertminne, SATA 3,0 Gbps och minneskretsar av MLC-typ.

Nu uppgraderas SSD-enheterna med en ny firmware som klämmer fram extra gigabyte genom att minska behovet av allokerat utrymme för wear leveling. Nya Vertex 2 kommer i storlekarna 60, 120 och 240 GB, upp från tidigare 50, 100 och 200 GB.

Precis som tidigare handlar det om 285 respektive 275 MB/s för läsningar respektive skrivningar och 50 000 IOPS för slumpmässiga skrivningar i storleken 4 KB. OCZ anger MTBF till hela två miljoner timmar och lämnar tre års garanti.

Vertex 2 E (Extended) ska finnas i butiker nästa vecka. Några prisuppgifter är ännu inte kända.

Flashminnet utgörs av 16 st. 34 nm Intel MLC NAND-kretsar vilket ger enheten totalt 128 GB lagring. 28 GB av dessa reserveras dock av Sandforce-kontrollern, vilket lämnar 100 GB tillgängligt för användaren.

Likt OCZ-enheterna är det en SF-1200-kontroller från Sandforce vi finner på insidan av Force-enheten. MLC NAND-kretsarna utgörs av de populära 34 nm Intel-varianterna och uppgår till totalt 128 GB. Till Force-serien har Corsair valt att endast tilldela lagringskontrollern 8 GB extrautrymme, vilket ger användaren totalt 120 GB att tillgå. Nackdelen med detta är att prestandan kan försämras något allteftersom enheten fylls.

Nackdelen med detta är att prestandan kan försämras något allteftersom enheten fylls.

Physically the drives are not changing as the same amount of flash on each drive will remain the same. The only real changes between a 100 and 120GB drive is the amount of flash kept in reserve, now 13% instead of 28%. Most other controllers up till now have used between 7 and 10% spare area, so the SandForce SF-1200 in extended capacity trim is still on the high side.

The new extended capacity SandForce drives will have a reduced lifespan; that is what the spare area is for.

The next area of concern is drive performance since the spare area is used to improve write speeds. It’s not like you just have a 13 or 28% area that does nothing until something else breaks. SandForce drives are dynamic and use all free space as spare area, kind of like having a bunch of NAND cache to bounce data around to when the controller sees fit. We are working on the next State of Solid State article now and will try some new testing procedures at that time on how volume fill affects performance.

There are a couple of things we were looking to find and answer with today’s article. The first and easiest to answer is the performance of the Vertex 2 in both 100 and 120GB capacities. In our testing we only found a couple of places where performance was reduced with the new extended drive and they were so close to the margin of error for each test that we can’t even look at the extended drive and say that real performance was lost. Both versions of the drive perform at the same level, as fast as anything else with a SandForce SF-1200 controller. When compared to the other next generation SSD on the market, the Crucial RealSSD C300 128GB, we felt the Vertex 2 E is the way to go.

The next thing we wanted to ponder hard over is the idea of removing capacity from the spare area and making it available to the user. On this we feel that even though a large chunk of space has been given to the user, the new extended SandForce 1200 still keeps a large percentage of space available for internal use. We don’t know how this will impact life expectancy, but at this point who has started to kill blocks in their SSD purchased even a couple of years ago? Given that at 100GB a SF-1200 is running at enterprise levels of reliability, typical home users can afford to shave a bit of time off since it is only really going to be used for a maximum of five years anyhow before being replaced with the next great technology.

OCZ Vertex 2 E Series 120GB Solid State Drive Exclusive Review Introduction :: TweakTown USA Edition

Citat:
Physically the drives are not changing as the same amount of flash on each drive will remain the same. The only real changes between a 100 and 120GB drive is the amount of flash kept in reserve, now 13% instead of 28%. Most other controllers up till now have used between 7 and 10% spare area, so the SandForce SF-1200 in extended capacity trim is still on the high side.

Citat:
The new extended capacity SandForce drives will have a reduced lifespan; that is what the spare area is for.

OCZ Vertex 2 E Series 120GB Solid State Drive Exclusive Review Introduction :: TweakTown USA Edition

Tydligen ingen större prestandaskillnad utan bara kortare livstid.