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- 1 Oct 2010
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- 97
okay i have a new crucial m4 128gig and its only saying 119 and 101gig free after install whats going on ???
Jmicron were the first manufacturer to create controllers for SSD's, they started off at very low speeds of approx 50mb/s read and 30mb/s write. The Jmicron controller JMF601A/602A used in the OCZ Core v1 SSD's suffered from stuttering problems, sometimes 3seconds of the system stalling due to the poor controller and lack of cache memory. The JMF601B/602B was released in june 2008 which improved the stuttering somewhat but required to use several GB of the SSD as temporary storage space as there was no cache, which is why the sizes were 30GB, 60GB, 120GB instead of 32/64/128gb, these still had a lot of problems. The OCZ Vertex drives were released using an indilynx controller and 64mb cache which removing the stuttering problem.
Jmicron have released newer controllers that fix the stuttering write problem (JMF618 & JMF612), currently indilynx is the most popular controller, it is used in gskill falcon, ocz vertex, crucial m225 and many other drives. Intel's controller is regarded as the best in terms of IOPS, however their write speed can be hampered in certain situations by the relatively low 70mb/s write speed. Sanforce's F-100 controller is the best overall controller, its either faster or nearly as fast as the intel in all areas, its definately the best bang for buck controller which was released in around March 2010.
Samsung's controller doesn't perform as well as the indilynx, intel or sandforce controllers at random read/write or other normal usage situations but those drives generally cost quite a bit less. The Sandforce F-100 Controller is pretty much the best controller there is, it offers 285mb/s read and 275mb/s write and IOPS of around 50,000 which is incredibly fast, it is used in the high-end OCZ Vertex 2E, Corsair Force F100, GSkill Phoenix and some other high-end drives. The Marvell controller is in the Crucial C300 line, the Crucial C300 256GB is the fastest SATA SSD you can buy, the 128GB and 64GB versions use slower memory which is why the write speeds and benchmarks are lower, overall the 64GB and 128GB versions are slower than the Sandforce controller-based drives.

Jmicron were the first manufacturer to create controllers for SSD's, they started off at very low speeds of approx 50mb/s read and 30mb/s write. The Jmicron controller JMF601A/602A used in the OCZ Core v1 SSD's suffered from stuttering problems, sometimes 3seconds of the system stalling due to the poor controller and lack of cache memory. The JMF601B/602B was released in june 2008 which improved the stuttering somewhat but required to use several GB of the SSD as temporary storage space as there was no cache, which is why the sizes were 30GB, 60GB, 120GB instead of 32/64/128gb, these still had a lot of problems. The OCZ Vertex drives were released using an indilynx controller and 64mb cache which removing the stuttering problem.
Jmicron have released newer controllers that fix the stuttering write problem (JMF618 & JMF612), currently indilynx is the most popular controller, it is used in gskill falcon, ocz vertex, crucial m225 and many other drives. Intel's controller is regarded as the best in terms of IOPS, however their write speed can be hampered in certain situations by the relatively low 70mb/s write speed. Sanforce's F-100 controller is the best overall controller, its either faster or nearly as fast as the intel in all areas, its definately the best bang for buck controller which was released in around March 2010.
Samsung's controller doesn't perform as well as the indilynx, intel or sandforce controllers at random read/write or other normal usage situations but those drives generally cost quite a bit less. The Sandforce F-100 Controller is pretty much the best controller there is, it offers 285mb/s read and 275mb/s write and IOPS of around 50,000 which is incredibly fast, it is used in the high-end OCZ Vertex 2E, Corsair Force F100, GSkill Phoenix and some other high-end drives. The Marvell controller is in the Crucial C300 line, the Crucial C300 256GB is the fastest SATA SSD you can buy, the 128GB and 64GB versions use slower memory which is why the write speeds and benchmarks are lower, overall the 64GB and 128GB versions are slower than the Sandforce controller-based drives.

well i said i got a 128gb ssd and it was only saying 119gb if you read that then it will tell you why if your on jmicron controller JMF601B/602B then it will use several GB of the ssd as temporary storage space as there was no cache so this tells me what i was trying to find out ;p
Having 119GB instead of 128 GB is entirely down to the difference between the SI (decimal) unit of measurement used by disk manufacturers and the binary unit of measurement used by Windows.
