In order to enable data migration between old and new subsystems to be performed under stopless operation, a plurality of first access paths 20 and 21 are prepared between a CPU 10 and an old CU 13 (old subsystem) having an old VOL 14 and a plurality of third access paths 30 and 31 are set between the...http://www.google.fr/patents/US20010000818?utm_source=gb-gplus-shareBrevet US20010000818 - Subsystem replacement method
Numéro de demande: 09/742,191 Numéro de publication: US 2001/0000818 A1 Date de dépôt: 22 déc. 2000 Brevet délivré: US6647476 ( Date de délivrance 11 nov. 2003)
