SAP Note 24334 - instinf_determine_disk_sizes 3 install error no:18

Symptom:

The installation of Informix terminates with the following error message in the R3INST.LOG:
instinf_determine_disk_sizes 3 Informix installation error no: 18
Smaller than 520424 KB: /dev/vg01/prd22

Cause and prerequisites

When installing raw devices, the size of each raw device is tested to check that it does not drop below or exceed a certain size.

• The minimal size of a raw device is controlled by the total of the root, phys, log and tmp dbspaces.

• The maximum size of a raw device is fixed at 2GB.
  (The UNIX call SEEK can only handle addresses from 0 to 2^31-1 = 2GB)
  For this reason, the total of "offset" and "size" of a chunk must also not exceed this limit.

Solution

Please check whether the raw devices adhere to these limits.
If the limits were adhered to, but the error message still appears, please test whether the raw devices physically allow themselves to be read.

• Stop all programs, which access the raw device in question. Therefore, also shut down the database.

• Execute the following "dd" command. dd if= of=/dev/null bs=1kExample: > dd if=/informix/QIH/sapdata/physdev1/data1 of=/dev/null bs=1k
  1323540+0 records in
  1323540+0 records outThe size of this raw device is 1323540 kB.

If the output of "dd" does not match the determined operating system values, please get the hard disk manufacturer to check this.