Abstract: A fiber structure includes a multilayer fabric including first yarns and second yarns. The fiber structure includes a first fabric edge, a second fabric edge, and fabric-style fixing portions. The fabric-style fixing portions are formed at least one of an outermost yarn and ends of one of the two types of yarns. Of the one of the two types of yarns, the outermost yarn is located closest to the ends of the other of the two types of yarns. The ends of the one of the two types of yarns are located closer to the ends than the outermost yarn.

Abstract: A fiber structure includes a first laminate and a second laminate, which are arranged such that the yarn main axes of first reinforcement fiber yarns and second reinforcement fiber yarns are caused to be orthogonal to each other and that the main yarn axes of first auxiliary yarns and second auxiliary yarns are caused to be orthogonal to each other. The engagement of first intermediate structure yarns of the first laminate and second intermediate structure yarns of the second laminate joins the first laminate and the second laminate together in the lamination direction.

Abstract: A data storage apparatus includes a processor that executes a process. the process includes: storing data sequentially input by sequentially repeating overwriting in blocks not determined as protection targets among a plurality of blocks in a storage area of a storage unit, each block having an upper limit in number of data rewrites; registering, upon detection of a protection trigger for giving an instruction to protect data, protection information for giving an instruction to protect data and block information indicating a block that stores data obtained a predetermined time before the detection of the protection trigger, in stored data; and managing, as blocks to be protected, blocks from the block that stores the data obtained the predetermined time before the detection to a block that stores data upon detection of a termination trigger for giving an instruction to terminate protection.