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Pdisk states GPFS™ Native RAID maintains its view of a pdisk and its corresponding physical disk by means of a pdisk state. The pdisk state consists of multiple keyword flags, which can be displayed using the mmlsrecoverygroup or mmlspdisk commands. You can also use the ESS GUI to display pdisk states. The attributes of a pdisk include the physical disk's unique worldwide name (WWN), its field replaceable unit (FRU) code, and its physical location code. Pdisk attributes can be displayed using the mmlspdisk command; of particular interest here are the pdisk device paths and the pdisk states. The IBM Spectrum Scale™ RAID pdisk is an abstraction of a physical disk. A pdisk corresponds to exactly one physical disk, and belongs to exactly one declustered array within exactly one recovery group. Before discussing how declustered arrays collect pdisks into groups, it will be useful to describe the characteristics of pdisks. A recovery group can contain a maximum of 512 pdisks. A declustered array within a recovery group can contain a maximum of 256 pdisks. The name of a pdisk must ... PdiskTV is a professional video and music player that supports all video formats, including 4K/Ultra HD video files. It also functions as a HD audio player, providing a comprehensive multimedia experience. This free video and audio player is capable of playing mp4, mpk, 3gp, and other video formats.
