Red Hat NETSCAPE MANAGEMENT SYSTEM 4.5 Uživatelský manuál stáhnout pdf (Strana 211)

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When a shared disk is used for high availability purposes, the current machine that is

running the application and using the shared data often reserves the disk using a SCSI

command.

If the bus sharing is physical, commands that reserve, reset or release a shared virtual

disk are transmitted through to the physical disk, so other machines sharing the disk

can properly detect when a virtual disk has been reserved or reset. Therefore, when

you are sharing disks among virtual machines across physical machines for high

availability purposes, it is often best to put only a single VMFS with a single virtual disk

on each shared disk — that is, have only one virtual disk per physical disk. In such a

configuration, each virtual disk can be reserved and released independently.

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