5 ms·

Do you have a reference for this info?

by mafro 15y ago

acqq 15y ago
http://www.micro-isv.asia/2010/12/never-defragment-an-ssd/ http://www.micro-isv.asia/2010/12/never-defragment-an-ssd/ "The key benefit to SSDs is that they have virtually no seek time. Reading adjacent blocks of data is no faster than reading blocks that are spread out over the drive. Fragmentation does not affect SSD drive speed. (...) SSD drives physically wear out as you write to them. Defragmentation software moves around all the files on your drive. Thus, defragmenting an SSD reduces its life span without giving you any benefits."
- starwed 15y ago
  I had an old netbook with an SSD. A lot of folk noticed that the performance of the disk got slower over time. Surprisingly, defragging the drive actually improved the performance -- but IIRC it was a side effect of the process, not directly anything to do with fragmentation. I don't quite remember what the issue was, but there was a good anandtech article about it: http://www.anandtech.com/show/2738/8 http://www.anandtech.com/show/2738/8 Fairly certain modern SSDs are not affected, in any case.
  - acqq 15y ago
    Article says: (Windows 7) "the OS knows it’s a SSD and turns off features like defrag" So you claim to see improvement from something turned off by the OS? How?
    - starwed 15y ago
      Err, this was several years ago, and I was relaying what other folk with the same device (ASUS 901) reported, not my personal experience. (And not only was this was before the release of Windows 7, it actually came with some version of Xandros installed...)
  - ScythedBlade 15y ago
    Ahh, do you know why? TRIM support isn't being used. When you're defragmenting, all you're doing is forcing the drive to write a lot, which itself essentially is a crazy way to fix it without TRIM command, but it works. On the other hand, you're doing a lot more write cycles than what TRIM or garbage collection would normally do.
ch0wn 15y ago
SSDs don't benefit from data being sequentially aligned. Random access is just as fast. Also, you should minimize the write access to the disk whenever possible.

Do you have a reference for this info?

by mafro 15y ago

Do you have a reference for this info?

acqq 15y ago

http://www.micro-isv.asia/2010/12/never-defragment-an-ssd/ http://www.micro-isv.asia/2010/12/never-defragment-an-ssd/ "The key benefit to SSDs is that they have virtually no seek time. Reading adjacent blocks of data is no faster than reading blocks that are spread out over the drive. Fragmentation does not affect SSD drive speed. (...) SSD drives physically wear out as you write to them. Defragmentation software moves around all the files on your drive. Thus, defragmenting an SSD reduces its life span without giving you any benefits."

starwed 15y ago
I had an old netbook with an SSD. A lot of folk noticed that the performance of the disk got slower over time. Surprisingly, defragging the drive actually improved the performance -- but IIRC it was a side effect of the process, not directly anything to do with fragmentation. I don't quite remember what the issue was, but there was a good anandtech article about it: http://www.anandtech.com/show/2738/8 http://www.anandtech.com/show/2738/8 Fairly certain modern SSDs are not affected, in any case.
- acqq 15y ago
  Article says: (Windows 7) "the OS knows it’s a SSD and turns off features like defrag" So you claim to see improvement from something turned off by the OS? How?
  - starwed 15y ago
    Err, this was several years ago, and I was relaying what other folk with the same device (ASUS 901) reported, not my personal experience. (And not only was this was before the release of Windows 7, it actually came with some version of Xandros installed...)
- ScythedBlade 15y ago
  Ahh, do you know why? TRIM support isn't being used. When you're defragmenting, all you're doing is forcing the drive to write a lot, which itself essentially is a crazy way to fix it without TRIM command, but it works. On the other hand, you're doing a lot more write cycles than what TRIM or garbage collection would normally do.

ch0wn 15y ago

SSDs don't benefit from data being sequentially aligned. Random access is just as fast. Also, you should minimize the write access to the disk whenever possible.