Hitachi MK-96RD647-01 manual 3390-3B/9B/LB Volume Structure FXmto

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Figure 2-4

3390-3B/9B/LB Volume Structure (FXmto)

Note: The open-system host accesses only the volume table of contents (VTOC) area on -B volumes. Catalog or security control functions cannot be used to provide access control for these volumes.

•FXotm. The FX -C volumes can only be used for FXotm operations. Open- system hosts have read/write access to the -C volumes but must use FAL/FCU to access these volumes as raw devices (no mount operation). z/OS hosts have read-only access to the -C volumes. The TagmaStore subsystem will reject all z/OS write operations to -C volumes (except VTOC) to protect the open-system data on these volumes. Figure 2-5shows the structure of the FX -C volumes.

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Figure 2-5 3390-3C/9C/LC, 3380-KC/3C Volume Structure (FXotm)

•FXoto. OPEN-xvolumes that are formatted with the FX Formatter (FMT) utility can only be used for FXoto operations. Open-system hosts have read/write access to the OPEN-xFMT volumes but must use FAL/FCU to access these volumes as raw devices (no mount operation). z/OS hosts do not have any access to the OPEN-xFMT volumes. Figure 2-6shows the structure of the FX OPEN-xFMT volumes.

About Cross-OS File Exchange Operations 2-5

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