Emulex LP10000ExDC Manual de usuario Pagina 117

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Understand Device Numbering
There are two levels of device numbering. The first level of device numbering is the driver
instance number. This is the number that is displayed in log messages to syslog or the
console, such as lpfcX. Typically the driver instance number is equal to the adapter
number.
The second level of numbering is the SCSI device number. This number is assigned by
the system for each SCSI target it detects. It is typically in the special files created to
access each SCSI device, for example, /dev/sda through /dev/sdz and /dev/sdaa through /
dev/sdax etc. Linux supports a total of 128 SCSI devices per system. Thus, a host could
support disk devices from /dev/sda through /dev/sddx.
Once these numbers are assigned, they will stay the same between reboots unless there
has been hardware changes to the system or Fibre Channel network, or some devices are
offline or not ready.
Emulex Documentation, Drivers and Software
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