Dealing with a badly fragmented disk

[Jon Pinkley]

Just a follow up on my reply from Jan 31, 2008 21:56:32 GMT.

I tested what the largest clustersize I could use to initialize a 50 GB vdisk. On both 7.3-2 and 8.3 it was 16380, so the help from 8.3 is correct.

Jon

[Jon Pinkley]

Here's the reason for the max cluster size being < 2^14:

The home block has a 16 bit field (HM2$W_IBMAPVBN) that contains the VBN of the first block of the index file bitmap in INDEXF.SYS. This VBN will always be clusterfactor*4+1, therefore the maximum clusterfactor must be .le. 16383 (16383*4)+1=65533.