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HSchulze

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Everything posted by HSchulze

  1. Same here. Had 64 installed, no sign in registry of 32. CC installed 32. Uninstalling IV32 caused some registry links to get trashed, so I had to uninstall IV64 older version. Then reinstall IV latest version. Not useful. Should I trust CC to update 4 drivers?
  2. Op asked: Why isn't it faster? The throughput algorithms worked for 50MB/s HDDs no longer holds for SSDs. Or is there additional driver and/or OS level (Win10Pro) overhead that is slowing it down? I am defragging about 200x 500KB 3-fragment files, throughput is <100KB/sec, on a Samsung 980.
  3. Long-time-ago (LTO) accessed files and LTO written files should be thrown to end of drive, to save re-defragmenting, and speed up access to newer files at the beginning and middle of the drive. I watched Norton SD for many hours trying to divine what it was up to. it was a Great Thing in the days of DOS. The various things that people want out of their defrag performance should be weighted, based on their priorities
  4. I am doing a once-after-6-months defrag of a 512GB Samsung SSD, which does 1 to 3 GB/s sequential reads, and usually around >600MB/s sequential writes. In an effort to understand the fragmentation, I started by defragging the largest and most fragmented files (top 100, etc) Now that I am looking at 500x 1MB files with ~4 fragments each, I am seeing <1 MB/s throughput for the last hour. I don't know why Defraggler doesn't use a scatter-gather with a live bitmap to read a pile of files into memory (32GB DRAM) in sector order (will help HDDs more), then write them back to the new locations, preferably sequentially behind each other. With the bitmap you mark files that you will read, and skip (or re-strategize) a file that hits a write to a read-pending cluster. This can be done multi-threaded instead of single-threaded. One thread reading and writing, one committing changes to the bitmap, another tracks writes to completed files that can be removed from the bitmap. I have 16 threaded CPU at 4GHz, which can saturate SSD 2GB/s with 1 thread.. This should run at least 10 to 20x faster since it isn't throughput constrained. First time I ran Defraggler was what seems like 10 years ago. It works. But has always been the slowest of the lot. I would pay $100 for a version that was full speed.
  5. Defragmenting all files all the time only increases the likelihood of bit rot as the data travels through your CPU, Memory, I/O chip, _without_ CRC protection. Defragging once every month to 3 is enough, unless you are a movie editor, in which case you will copy your files to a different media or server once you are done, and erase the fragmented files anyways (then defrag).
  6. Use Windows recovery options, searchable on Google and other search systems. The latest software will find out what is wrong and make recommendations.
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