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Introduction 1-5
Hitachi Universal Storage Platform V/VM Configuration Guide for SGI
®
IRIX
®
Host Attachment
Device Type Description
FX Devices (3390-
3A/B/C, OPEN-x-FXoto) Using USP V’s Cross-OS File Exchange (FX) feature, you can share data
across mainframe, UNIX, and PC server platforms using special
multiplatform volumes. The VLL feature can be applied to FX devices for
maximum flexibility in volume size. For more information about FX, see the
Hitachi Cross-OS File Exchange User’s Guide (MK-96RD647), or contact your
Hitachi Data Systems account team.
FX devices are not SCSI disk devices, and must be installed and accessed as
raw devices. UNIX/PC server hosts must use FX to access the FX devices as
raw devices (no file system, no mount operation).
The 3390-3B devices are write-protected from UNIX/PC server access. The
USP V rejects all UNIX/PC server write operations (including fibre-channel
adapters) for 3390-3B devices.
Multiplatform devices are not write-protected for UNIX/PC server access. Do
not execute any write operation by the fibre-channel adapters on these
devices. Do not create a partition or file system on these devices. This will
overwrite any data on the FX device and prevent the FX software from
accessing the device.