Please find here a compiled document which described the Up-gradation/Installation process of DSpace along with the old data. Please note that this document is compiled with special reference to data migration and up-gradation of very old DSpace 1.2.1 to latest version 4.2.
Some tips and solutions of the common problem is given in the document. Please note that solutions has been discovered from the various Internet sources and mailing lists and fully tested. Please feel free to contact for up-gradation if you have old version or if you want to implement the same.