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JFS (de)Fragmentation

Started by StefanZ, 2010.07.15, 19:47:18

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StefanZ

Hello everyone.

- Is there a way how to analyze (and show) the current JFS volume fragmentation?
- are there any (fully functional) tools to defrag JFS?

Thanks in advance.

Pete

Hi StefanZ

You should have defragfs.exe in the \OS2 directory although it is not usually needed - you may want to have a read through http://www.softpanorama.org/Internals/Filesystems/jfs.shtml especially the bit about JFS Utilities.

Not sure if JRescuer can show fragmentation http://en.ecomstation.ru/projects/jrescuer/

Regards

Pete

ivan

Hi Stefan,

I think the answer is NO, and my experience is that there is also no reliable way of recovering a dud disk other than reformatting and restoring from backup.

A possible way to consolidate files on a JFS volume is to XCOPY everything to another disk  reformat the original and then XCOPY it all back.  At least when I did that after a disk crash I had more free space shown than before the restore.

ivan