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Samsung evo erase block size in unix

images samsung evo erase block size in unix

Active 3 years, 7 months ago. Currently, I'm using fdisk -cu starting at sector Few if any manufacturers report them in the datasheets. Question feed. With this concept, it is most common to align on 1MB boundary, so it won't matter if the block size is 4 or 16kb; all of these will be mulitplys of 2 and below 1M so aligning on that boundary will fit them all. Short of using Google to search for someone else who has done the research, you can try to estimate it yourself using FlashBench. Active 2 months ago. Featured on Meta.

  • partitioning How to determine SSD's Nand erase block size Super User
  • Is the default byte physical sector size appropriate for SSD disks under Linux Ask Ubuntu

  • There is no standard way for a SSD to report its page size or erase block size. Few if any manufacturers report them in the datasheets. (You should have done some writes to the SSD already, because reading The educated guess here is that 4 MB is the erase block size, also. This is surprising, because it's useful for many things other than just SSD's. This kind of alignment is important if you are using any kind of.
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    images samsung evo erase block size in unix

    Old hardware and Operating Systems used byte sectors, since almost all storage hardware has or larger byte sectors; but some hardware supports emulation of byte sectors for legacy systems. However, the stat -f command on both disks reports:. I don't know what "stat 4K " is. Similarly, both 16 KB and 8 KB boundaries are special.

    images samsung evo erase block size in unix
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    Ask Question. Viewed 16k times. Super User works best with JavaScript enabled. Featured on Meta. SSDs work with these pages and blocks, "they can only erase data at the block level" thus the block of pages is called "[NAND] erase block".
    So erase block size for such SSD should be divisible by 3 and some suggested that for Evo-s, it's KiB.

    Video: Samsung evo erase block size in unix The LINUX File System, Boot Block, Super Block, Inode Table - UNIX/LINUX Tutorials for beginners

    And it's generally beneficial to align. Does anyone have a reliable source on what alignment is needed for this SSD? On Phoronix, I read that Samsung's TLC drives use KB. I just purchased two Corsair P SSD for use with my Laptop and Desktop with Ubuntu Lucid Lynx I understand for the drive to be set.
    However, applying this concept depends on what you are aligning; loosing 1MB at the start of a mass storage device is totally acceptable while loosing that many times in a different scenario might not be.

    partitioning How to determine SSD's Nand erase block size Super User

    Ask Ubuntu works best with JavaScript enabled. Use fdisk -l to check for alignment issues. Congratulations to our 29 oldest beta sites - They're now no longer beta! Short of using Google to search for someone else who has done the research, you can try to estimate it yourself using FlashBench.

    images samsung evo erase block size in unix

    This is a default Ubuntu I got the same results as you got by running stat -f and smartctl on two SSDs.

    images samsung evo erase block size in unix
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    The best answers are voted up and rise to the top. Even so it's best to have up to date software and hardware, and use 4K sector size.

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    Is the default byte physical sector size appropriate for SSD disks under Linux Ask Ubuntu

    How to determine SSD's Nand erase block size? FedonKadifeli FedonKadifeli 2 2 silver badges 20 20 bronze badges.

    You create a block size that are made up of eight byte physical Both of my disks are SSDs and AFAIK SSD disks require a sector size of 4K. than ensuring that your partitions are aligned with the erase block size. Just as a followup, while a SSD may have KB erase block size as a whole device, each internal flash chip's erase block size / rw page size.

    Partition & format your disk aligning the partition blocksize to the SSD erase block size, with the above information (1 partition, no swap.
    What is "physical" sector size here?

    Asked 2 years, 7 months ago. This question is probably the same as this one for USB flash -- the answer is missing the point there, man fsstat says fsstat displays the details associated with a file system and the question is about the disk itself.

    According to Wikipedia "Advanced Format AF is any disk sector format used to store data in disk drives that exceeds, or bytes per sector, such as the byte sectors of an Advanced Format Drive AFD. And "logical" is the sector size for the partition?

    images samsung evo erase block size in unix
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    This shows the access times to do two byte reads around the boundaries of power-of-two aligned blocks. Unicorn Meta Zoo 7: Interview with Nicolas. And "logical" is the sector size for the partition? Reading at the end of a MB unit takes around microseconds, reading the last block of this unit together with the first block of the next one takes about microseconds and reading the first two blocks in a MB unit takes around microseconds.

    Featured on Meta. By looking for breaks in the time by block size, you can infer what the erase block size is.

    2 thoughts on “Samsung evo erase block size in unix

    1. What is "physical" sector size here? With this concept, it is most common to align on 1MB boundary, so it won't matter if the block size is 4 or 16kb; all of these will be mulitplys of 2 and below 1M so aligning on that boundary will fit them all.

    2. Sign up using Email and Password. The physical block size reported by fdisk is the physical block size reported by the disk when asked.