g98/linux: a disk usage problem

[<marketa \\at// hamiltonian.chem.cornell.edu>]

 Dear CCLers,
 in order to use maximum of my disk capacity for a "large" MP2 calc., I
 have splitted the *rwf file in the following way:
 --
 %RWF=a,1800MB,b,1800MB,c,1800MB,d,1800MB,e,1800MB,f,1800MB,g,1800MB
 #p mp2/6-311+G(2d,p) nmr guess=read maxdisk=12GB
 --
 At the disk-space most demanding point of the calc (correlated calc of
 nmr) the calc crashes as it apparently requires more disk space
 than it was allowed to allocate:
 --
              Reordered first order wavefunction length =    434653128
  WUsed=    342120743 WInt=       4679168 WEnd=     752340992
  Dk804=   -331254506 Dk1111=           0 Dk1112=   538051750
  MaxDsk=  1610612736 LAFull=   434653128 LimDsk=  1610612736
  NUsed=  110526959  226931055  411771717  194624975 1170984046 1106062213
  In DefCFB: NBatch=  1, ICI= 42, ICA=351, LFMax=  4
              Large arrays: LIAPS=  1143323488, LIARS=  1812020608 words.
  No file to extend for IUnit=  1 -- out of disk space.
  Error termination in NtrErr:
  NtrErr called from NtrExt.
 --
 At the same time, however, the "maxdisk" keyword ensures that _less_
 space
 should be required than available in the 7 *rwf files (which is less than
 my disk capacity). Is there a stronger way of telling the code how much disk
 can be used, or can this be a compilation-related problem? Many thanks
 for any hint.
 Marketa