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Author's profile photo Hüseyin Bilgen

Confusing contradictions about HANA File Systems

If you’re new to this HANA thing, and if you’re a Basis Consultant, you normally start with reading the installation guides and related and referenced OSS Notes before beginning the installation of a new solution.

So did I.

While preparing our company for RDS Qualification of Business Suite on HANA Migration, I started with downloading the RDS materials and then I downloaded the guides for SAP HANA installation Version 1.0 SPS07 from

Also, as I’m not going to install the system on a certified hardware, I read the blog How to install the HANA server software on a virtual machine for installing the system on Amazon Web Services EC2 instances.

But, at the beginning, I noticed a contradiction between guides and materials. Here is the list of materials and contradiction between them.

Material ID Link to Material
Material 1 (M1)
Material 2 (M2) How to install the HANA server software on a virtual machine
Material 3 (M3) 1793303 – Install and configure SUM for SAP HANA

According to M1, on page 16 (2.3.1  Recommended File System Layout) and M2, your HANA system’s FileSystems has to be as follow:

File System Default Path Recommendations
Root / Recommended disk space = 10 GB
Installation path /hana/shared/

The installation path (mount directory) requires disk space equal to

the default system RAM. (GB = RAM)

System instance /usr/sap The system instance directory requires at least 50 GB disk space
Data volume


The data path requires disk space equivalent to four times the size of

the system RAM. (GB = 4*RAM)

Log volume /hana/log/<SID>

The log path requires disk space equivalent to the default system


According to M3 (Which is updated on 19.03.2013);

Standard locations of HANA components as of HANA SPS04:

  • SAP HANA database – /usr/sap/<SID> – this can be just a link but it must exist
  • SAP HANA client – /usr/sap/hdbclient
  • SAP HANA studio – /usr/sap/hdbstudio
  • SAP HANA studio update repository – /usr/sap/hdbstudio_update
  • SAP Host Agent – /usr/sap/hostctrl

If SAP HANA Database uses non-standard directory layout, SUM for SAP HANA cannot support it and the system has to be reinstalled.

If some of the other components are installed in different locations, you should remove them as the script and the subsequent update with SUM for SAP HANA will install them in the proper locations.

If we ignore the M2 (Which is a Blog and not written by a SAP Worker) how we can explain the difference between the Guide and SAP Note.

Is there any official statement for this? If yes, can you please share it?

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