[comp.sys.ibm.pc] DOS 4.01 cluster size

kens@hplsla.HP.COM (Ken Snyder) (02/02/90)

The last few days there has been a discussion about DOS 4.01 using 4k cluster
sizes.  Some alluded to the fact that if you dropped the size of a partition
the cluster size would drop to 2k (since there is a 64k limit on some table
somewhere).  Well, last night I tried reformatting (using FDISK) a 150Mbyte
drive into a 128Mbyte partition and when it was all said and done I still
had 4k clusters.  So how do I get DOS to give me 2k clusters?

Thanks for the info,

Ken

Ralf.Brown@B.GP.CS.CMU.EDU (02/02/90)

In article <5190073@hplsla.HP.COM>, kens@hplsla.HP.COM (Ken Snyder) wrote:
}The last few days there has been a discussion about DOS 4.01 using 4k cluster
}sizes.  Some alluded to the fact that if you dropped the size of a partition
}the cluster size would drop to 2k (since there is a 64k limit on some table
}somewhere).  Well, last night I tried reformatting (using FDISK) a 150Mbyte
}drive into a 128Mbyte partition and when it was all said and done I still
}had 4k clusters.  So how do I get DOS to give me 2k clusters?

The limit is actually 64K-18 (yes, eighteen).  If you formatted to exactly
128M, you still had too many clusters for 2K clusters.	Try 127M instead.

--
UUCP: {ucbvax,harvard}!cs.cmu.edu!ralf -=- 412-268-3053 (school) -=- FAX: ask
ARPA: ralf@cs.cmu.edu  BIT: ralf%cs.cmu.edu@CMUCCVMA  FIDO: Ralf Brown 1:129/46
"How to Prove It" by Dana Angluin              Disclaimer? I claimed something?
14. proof by importance:
    A large body of useful consequences all follow from the proposition in
    question.