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How to determine what parameters decides that max partition size of an OS would be like 16TB in ext3 or any of the other filesystem?

ramesh.mimit
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  • Wikipedia has information about maximum file system sizes and implementation limits. For example: [ext3](https://en.wikipedia.org/wiki/Ext3), [NTFS](https://en.wikipedia.org/wiki/NTFS) – Nayuki May 06 '15 at 16:38

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It's going to be different for each type of filesystem. For ext3 and ext4, you can determine the max partition size by:

  • Getting the block size with tune2fs -l /dev/sda1 | grep 'Block size:'
  • Checking for a 64bit flag on the filesystem: tune2fs -l /dev/sda1 | grep 64bit
  • If there is one, multiplying the blocksize by 264. Otherwise multiplying it by 232.
  • Dividing that number by 10244 to get terabytes.
Allen Luce
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