Abstract: A virtualization method for a storage system recognizes one or more logical devices located in a first and second storage apparatus and defined in a host apparatus as being connected to a channel, based on an inquiry command sent from the host apparatus when the channel comes on-line; detects one or more logical devices among the one or more logical devices defined in the host apparatus as being connected to the channel and located in the first and second storage apparatus, based on the recognition result; sets, based on the detection result, one or more virtual volumes in the first storage apparatus, respectively corresponding to the one or more logical devices in the second storage apparatus; and sets a first logical path between each of the set one or more virtual volumes and each of the corresponding one or more logical devices in the second storage apparatus.

Abstract: A storage apparatus 10 includes channel devices (each being CHA_PK 11) and microprocessors (each being MP_PK 12). CHA_PK 11 and MP_PK 12 respectively store therein control information being information designating logical volumes (LDEVs) 171 accessible by respective MP_PKs 12. Upon receipt of an I/O request from a management apparatus 20, CHA_PK 11 transmits, based on the control information stored therein, an I/O command to MP_PK 12 having an access right to a logical volume to which the I/O request is directed. In the storage apparatus 10, MP_PK 12 having received the I/O command from CHA_PK 11 judges based on the control information stored therein whether MP_PK 12 itself has an access right to the logical volume, and transmits the control information therein to CHA_PK 11 when judging that it does not have the access right, whereby the control information in CHA_PK 11 is updated.

Abstract: A virtualization method for a storage system recognizes one or more logical devices located in a first and second storage apparatus and defined in a host apparatus as being connected to a channel, based on an inquiry command sent from the host apparatus when the channel comes on-line; detects one or more logical devices among the one or more logical devices defined in the host apparatus as being connected to the channel and located in the first and second storage apparatus, based on the recognition result; sets, based on the detection result, one or more virtual volumes in the first storage apparatus, respectively corresponding to the one or more logical devices in the second storage apparatus; and sets a first logical path between each of the set one or more virtual volumes and each of the corresponding one or more logical devices in the second storage apparatus.

Abstract: A storage apparatus 10 includes channel devices (each being CHA_PK 11) and microprocessors (each being MP_PK 12). CHA_PK 11 and MP_PK 12 respectively store therein control information being information designating logical volumes (LDEVs) 171 accessible by respective MP_PKs 12. Upon receipt of an I/O request from a management apparatus 20, CHA_PK 11 transmits, based on the control information stored therein, an I/O command to MP_PK 12 having an access right to a logical volume to which the I/O request is directed. In the storage apparatus 10, MP_PK 12 having received the I/O command from CHA_PK 11 judges based on the control information stored therein whether MP_PK 12 itself has an access right to the logical volume, and transmits the control information therein to CHA_PK 11 when judging that it does not have the access right, whereby the control information in CHA_PK 11 is updated.

Abstract: A storage apparatus 10 includes channel devices (each being CHA_PK 11) and microprocessors (each being MP_PK 12). CHA_PK 11 and MP_PK 12 respectively store therein control information being information designating logical volumes (LDEVs) 171 accessible by respective MP_PKs 12. Upon receipt of an I/O request from a management apparatus 20, CHA_PK 11 transmits, based on the control information stored therein, an I/O command to MP_PK 12 having an access right to a logical volume to which the I/O request is directed. In the storage apparatus 10, MP_PK 12 having received the I/O command from CHA_PK 11 judges based on the control information stored therein whether MP_PK 12 itself has an access right to the logical volume, and transmits the control information therein to CHA_PK 11 when judging that it does not have the access right, whereby the control information in CHA_PK 11 is updated.

Abstract: A virtualization method for a storage system recognizes one or more logical devices located in a first and second storage apparatus and defined in a host apparatus as being connected to a channel, based on an inquiry command sent from the host apparatus when the channel comes on-line; detects one or more logical devices among the one or more logical devices defined in the host apparatus as being connected to the channel and located in the first and second storage apparatus, based on the recognition result; sets, based on the detection result, one or more virtual volumes in the first storage apparatus, respectively corresponding to the one or more logical devices in the second storage apparatus; and sets a first logical path between each of the set one or more virtual volumes and each of the corresponding one or more logical devices in the second storage apparatus.

Abstract: A virtualization method for a storage system recognizes one or more logical devices located in a first and second storage apparatus and defined in a host apparatus as being connected to a channel, based on an inquiry command sent from the host apparatus when the channel comes on-line; detects one or more logical devices among the one or more logical devices defined in the host apparatus as being connected to the channel and located in the first and second storage apparatus, based on the recognition result; sets, based on the detection result, one or more virtual volumes in the first storage apparatus, respectively corresponding to the one or more logical devices in the second storage apparatus; and sets a first logical path between each of the set one or more virtual volumes and each of the corresponding one or more logical devices in the second storage apparatus.

Abstract: With this storage apparatus and its control method for presenting multiple virtual volumes to a host apparatus and dynamically allocating to each of the multiple virtual volumes a physical storage area for storing data according to the usage status of each of the multiple virtual volumes, the importance set to each of the multiple virtual volumes is managed, and a storage area is dynamically allocated to each of the multiple virtual volumes. Here, upon dynamically allocating the storage area to each of the multiple virtual volumes, a storage area provided by a plurality of memory apparatus groups respectively configured from a plurality of memory apparatuses is allocated to one or more virtual volumes with low importance among the multiple virtual volumes, and a storage area provided by one of the memory apparatus groups is allocated to other virtual volumes among the multiple virtual volumes.

Abstract: The present invention provides a storage control subsystem that facilitates logical volume access management by a host. Before copying, the host instructs a disk array device to identify the states of target logical volumes and collect information in control memory, whereupon the disk array device reads information in the control memory and reports information relating to the target logical volumes to the host.

Abstract: A control technique for resident information or release of resident information in a cache memory is provided, by which residence is set into a cache memory without regard of a logical volume where a dataset is present, and an unused resident area in the cache memory is automatically deleted. In an information processing system, a host system has a resident management program for automatically acquiring a logical volume name from a dataset name specified by the user with reference to catalog information for managing dataset stored in the logical volume and instructing the dataset on the logical volume having the corresponding logical volume name to be resident. Further, a disk array system has microprogram for making the dataset on the logical volume having the corresponding logical volume name resident in the cache memory in response to the instruction to set residence from the resident management program.

Abstract: Provided is a highly-reliable storage system, virtualization method, and storage apparatus that are less burdensome settings-wise. The internal apparatus recognizes one or more logical devices defined in a host apparatus as being connected to a channel, based on an inquiry command sent from the host apparatus when the channel comes on-line; detects one or more logical devices, from among the one or more logical devices defined in the host apparatus as being connected to the channel, that exist in the external apparatus, based on the recognition result; sets, based on the detection result, one or more virtual volumes in its own apparatus, respectively corresponding to the one or more logical devices defined in the host apparatus as being connected to the channel, that exist in the external apparatus; and also sets a first logical path between each of the set one or more virtual volumes, and each of the corresponding one or more logical devices existing in the external apparatus.

Abstract: The present invention provides a storage control subsystem that facilitates logical volume access management by a host. Before copying, the host instructs a disk array device to identify the states of target logical volumes and collect information in control memory, whereupon the disk array device reads information in the control memory and reports information relating to the target logical volumes to the host.

Abstract: The present invention provides a storage control subsystem that facilitates logical volume access management by a host. Before copying, the host instructs a disk array device to identify the states of target logical volumes and collect information in control memory, whereupon the disk array device reads information in the control memory and reports information relating to the target logical volumes to the host.

Abstract: A control technique for resident information or release of resident information in a cache memory is provided, by which residence is set into a cache memory without regard of a logical volume where a dataset is present, and an unused resident area in the cache memory is automatically deleted. In an information processing system, a host system has a resident management program for automatically acquiring a logical volume name from a dataset name specified by the user with reference to catalog information for managing dataset stored in the logical volume and instructing the dataset on the logical volume having the corresponding logical volume name to be resident. Further, a disk array system has microprogram for making the dataset on the logical volume having the corresponding logical volume name resident in the cache memory in response to the instruction to set residence from the resident management program.

Abstract: The present invention provides a storage control subsystem that facilitates logical volume access management by a host. Before copying, the host instructs a disk array device to identify the states of target logical volumes and collect information in control memory, whereupon the disk array device reads information in the control memory and reports information relating to the target logical volumes to the host.