the recent work involves anroid porting to 6410. Since there is only one Development Board for others to debug first, I will first make up the basics of Flash Driver.
first, the number of accesses. In theory, the MLC architecture can only handle about 10 thousand data writes, while the SLC architecture can withstand about 0.1 million data writes, 10 times that of MLC. This 10 thousand refers to the number of data writes, not the total number of data
In the U disk, SSD and other solid-state storage products, flash chip particles is the core, which relates to product costs, life and speed. Flash chip particles are mainly three types, respectively, SLC, MLC, TLC, the difference between the three, as follows.
What is the difference between SLC, MLC, and TLC flash chip particles?
SLC = Single-level Cell, that i
Solid-State drive with its own advantages such as ultra-fast access rate, by more and more computer enthusiasts favor, and quickly spread to the vast number of users of the computer, because the solid-state drive and traditional mechanical hard disk compared to the efficiency of the operation has been a qualitative improvement, but also is the United States network small to remind everyone is, Buy solid-state drives can not blindly follow the follow-up, to ensure that the solid-state drive to un
The storage units are divided into two categories: SLC (single-level cell monolayer) and MLC (multi-level cell multilayer). In addition, SLC flash memory has the advantage of 100,000 replication times, up to 10 times times higher than MLC flash memory. In addition, in order to ensure the life of MLC, the control chip is calibrated and the intelligent wear balance technology algorithm, so that each memory un
Slc=single-levelcell, that is, 1bit/cell, fast life, high price (about MLC3 times more than the price), about 100,000 times erase lifeMlc=multi-levelcell, namely 2bit/cell, Speed general life, price general, about---10,000 times erase lifeTlc=trinary-levelcell, namely 3bit/cell, also has the Flash factory called 8LC, the speed slow life short, the price is cheap, about 500 times erase the writing life, at present has not been able to do 1000 times by
SLC = Single-level Cell, namely 1bit/cell, fast life, high price (about 3 times times more than MLC), about 100,000 times erase lifeMLC = Multi-level Cell, that is, 2bit/cell, speed general life, price general, about 10,000 times---erase lifeTLC = Trinary-level Cell, that is, 3bit/cell, also has flash manufacturers called 8LC, Slow life, low price, about 500 times erase life, there are no manufacturers can do 1000 times.My suggestion is that the 64G s
SSD (solid State Drives), or SSD, is a hard disk made of solid-state electronic memory chips, consisting of a control unit and a memory unit (flash chip or DRAM chip).SSD storage media are divided into two, one is the use of flash memory (Flash chip) as an access medium, the other is the use of DRAM as a storage medium.SSDs are divided into three types of storage crystals: SLC, MLC and TLC.SLC is all called single level Cell, storage unit 1bit/cell, t
Nor and NAND
Nor and NAND are both Flash technologies. Nor is developed by Intel. It is somewhat similar to memory and allows direct access to any memory unit through an address. The disadvantage is: low Density (Small capacity), low write and erase speeds. Nand is developed by Toshiba. It features high density (Large capacity) and fast write and erase speeds. However, it can only be accessed after address conversion through a specific IO Interface, some are similar to disks.
The USB flash drive
SSD, SAS, SATA
Real-time SSD is best; SAS io is faster; SATA is the cheapest and should be used as a storage server (low frequency of access)
The following major sectors are excerpted from the network:
MLC SSD and SLC SSD
SSD (Solid state disk or Solid state Drive), also known as an electronic hard disk or solid-state electronic disk, is a hard disk consisting of a control unit and a solid-state storage unit (DRAM or Flash chip).Solid-State hard di
Samsung has also invested a lot of energy in the storage of NAND Flash. It has deep development for pure NAND Flash, onenand (NAND Flash module with controller), and NAND drivers. The NAND mentioned later will be based on Samsung products, including drivers.
The naming rules for Samsung pure NAND Flash (that is, the NAND flash storage chip without other modules) are as follows:
1. Memory (k)
2. nand flash: 9
3. Small Classification
(SLC: single level
First of all, as far as the chip problem is concerned, there are three kinds of SLC, MLC and TLC present on the market. SLC chip USB flash drive has an obvious advantage in speed, which fully demonstrates the strong performance of SLC's chip. SLC chip has a strong advantage in loading speed and data transmission speed, and SL
The SARscape5.2 supports the reading of Sentinel 1 a data and the supported data types are:
SM slc--Diagonal Single-view plural products with stripe mode
IW slc--Interference width mode (TOPS mode) Single-View complex product
EW slc--Ultra Wide Format (TOPS mode) Single-view complex products
SM grd--stripe mode for ground distance multi-view
In the process of using U disk, sometimes you will encounter a U disk read and write speed is very slow situation, at this time most users will think that the main chip is a U disk problem caused by, in fact, is not exactly like this, U disk is composed of the main control chip and Flash chip, Normal situation u disk speed mainly depends on the main control chip and Flash chip in these two aspects.
In the chip aspect, the main has SLC, MLC, TLC three
Speed to reach 80mb/s USB3.0 USB flash drive
Speeds up to 160mb/s USB drive
Speed to reach 220mb/s above the USB drive
Light from these test results, the gap is indeed quite obvious. Of course, the strength of different USB disk manufacturers will have a certain impact on product quality, but this is not a key factor. The key to the speed difference between these products is the main control and chip. Different chip stability, speed is not the same, and different maste
slices
The slice (slice) itself is not a dynamic array or an array pointer. It internally sets the action to the specified array by referencing the underlying array and setting the correlation property.There are three properties: the underlying array pointer, length, capacity.Length refers to the length of the current slice, which is the length at which the underlying array has been stored.Capacity is the maximum length that a slice can use, not necessarily the length of the underlying array. D
Tags: des Io ar OS for SP on 2014 log Week9: Search for Papers 1. * (reference) Title: improving performance and capacity of flash storage devices by exploiting heterogeneity of MLC flash memory Author: Sungjin Lee; Jihong Kim from: IEEE Transactions on computers content: (1) a mlc nand flash memory, each memory cell can be programmed as a single-level cell or a multi-level cell at runtime (2) present a flexible FLASH file system, called flexfs, (3) To provid E high performance and high capacit
EmbeddedLinux Bare Metal Development (11)--nandflash First, about Nand Flash nand f lash Yes flash, has the advantages of large capacity, fast rewriting speed, and is suitable for storing large amounts of data n and flash no special address line , send instructions The address and data are all via a 8/16-bit wide bus (I/O interface) to the internal register. Nandflash is divided into SLC and MLC two categories.
merges two integer slices, returning slices without duplicate elements, with two deduplication strategies
1. Filter repeating elements through a double loop (time-to-space)
Filter repeating elements through a double loop
func removerepbyloop (SLC []int) []int {
Result: = []int{} //store result for
I: = Range slc{
Flag: = True
for j: = Range result{
if
Originally from: Http://www.infoq.com/cn/news/2015/07/api-or-notNot so long ago, on the Stackexchange website, a user named SLC mentioned that he was designing an ASP. There are some flags about whether to design the backend as an API, and I hope to get some advice. A stone stirred thousands of waves, this post quickly got a lot of attention and reply. Now let's look at the specific situations and problems that SL
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