Abstract: The version management method according to the present invention by a computer system comprises a repository server 2 and a user terminal 1. The repository server 2 executes a procedure that the file to be updated within the user repository 26 are updated by the user terminal 1, a procedure that the files to be updated within the user repository 26 are updated so as to write the files to be updated on the system repository 22, and a procedure that the file to be updated within the system repository 22 are read by the arbitrary user terminal 1.

Abstract: When a file server is to create data that does not permit falsification in an external storage, it is not possible to guarantee that the rewriting of this data can be prevented from a computer connected to the external storage without going through a file server. Provided is a storage system configured from a first storage having a file I/O processing unit and a second storage connected to this first storage, wherein the first storage includes a unit for requesting a change of access authority to the storage area in the own storage and in the second storage provided to the own storage. An access request to a storage area in a second storage from a computer connected to a second storage without going through a file I/O processing unit is restricted based on the change of access authority executed by the second storage upon receiving the request from the first storage.

Abstract: When a file server is to create data that does not permit falsification in an external storage, it is not possible to guarantee that the rewriting of this data can be prevented from a computer connected to the external storage without going through a file server. Provided is a storage system configured from a first storage having a file I/O processing unit and a second storage connected to this first storage, wherein the first storage includes a unit for requesting a change of access authority to the storage area in the own storage and in the second storage provided to the own storage. An access request to a storage area in a second storage from a computer connected to a second storage without going through a file I/O processing unit is restricted based on the change of access authority executed by the second storage upon receiving the request from the first storage.

Abstract: The present invention provides a porphyrin compound containing a biotinyl group represented by Formula (I): Por-A-Bi wherein Por represents a porphyrin residue optionally forming a metal complex; Bi represents an optionally substituted biotinyl group; and A represents a C1-C20 hydrocarbyl group, or a heterohydrocarbyl group having 1-5 heteroatoms selected from a group consisting of oxygen, sulfur, and nitrogen, and having 1-20 atoms in total; a method for purifying hemoprotein which use the porphyrin compound; a hemoprotein labeling reagent; a diagnostic agent for hemoprotein associated diseases which use the porphyrin compound; and a therapeutic agent for photodynamic therapy.

Abstract: Provided is a storage system including: a nonvolatile memory which stores and erases data for respective blocks; and a controller for inputting and outputting the data to and from the nonvolatile memory, wherein: the storage system has a storage area including: a rewritable area where a stored data can be erased; and a write-once area where the stored data cannot be erased; and the controller determines a block belonging to the rewritable area based on an attribute of the block, and performs a wear leveling process and a reclamation process only on the block determined as belonging to the rewritable area.

Abstract: The version management method according to the present invention by a computer system comprises a repository server 2 and a user terminal 1. The repository server 2 executes a procedure that the file to be updated within the user repository 26 are updated by the user terminal 1, a procedure that the files to be updated within the user repository 26 are updated so as to write the files to be updated on the system repository 22, and a procedure that the file to be updated within the system repository 22 are read by the arbitrary user terminal 1.