Quantum SNC 4000, Руководство пользователя

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96 Service Port Command Reference
mapRebuildDatabase
Occasionally, it may be necessary to eliminate the Persistent Device Map database entirely, allowing the
existing devices to have new addresses assigned. The
mapRebuildDatabase
command deletes the
current database. When the SNC 4000 is next booted, the devices found will be assigned new addresses.
When you run this command you will be given the option of also clearing the SFM access settings. Because
devices will be assigned new addresses, clearing the SFM database ensures that hosts will not have access
to the wrong LUNs. Accepting this option requires that the system administrator reassign SFM access
permissions between the hosts and LUNs.
This may be required when a host system has a limited number of logical units that may be supported, and
changing devices on the SNC 4000 has caused the logical unit numbers to increase beyond the host’s
supported level.
SNC4000 > mapRebuildDatabase
This command will clear the Persistent Device Map.
Existing SFM Access Settings may become invalid and
should be cleared because LUN assignments may change!
These changes will take effect when the SNC 4000 is rebooted.
Do you want to clear the Device Map? (y or n) y
Removing the Persistent Device Map
Device Map Cleared - Do you want to clear SFM Access Settings? (y or n) y
SFM Access Cleared - Reboot SNC 4000 (y or n) y== reboot
mapRemoveDevice [devId]
The
mapRemoveDevice
command is used to remove a device from the persistent device map. This
command takes a single parameter which is the device ID (devId) of the device to be removed from the map.
Device ID can be determined by finding the device in the list generated by
mapShowDevs .
SNC > mapRemoveDevice 2
Must stop the IO for this device before continue. Continue(y/n)? y
value = 0 = 0x0
SNC >
mapShowDatabase
The SNC 4000 maintains a database of attached devices, to insure that each time a host attaches to it, the
target devices are seen at a consistent address. The database will list not only the devices presently
connected, but also devices that have previously been connected. If a previously attached device is later
reattached, it will be assigned back to its previous address. Use the
mapShowDatabase
command to
display the persistent device map table.
SNC4000 > mapShowDatabase
devId Type Chan tId tLun UID Path
-------------------------------------------------------
000 SNC 127 127 127 00000060:45000000 SINGLE
SN:
001 SCSI 001 006 000 20100060:45000000 SINGLE
SN:
002 SCSI 001 001 000 20200060:45000000 SINGLE
SN:
CAUTION
Clearing the map database will cause device addresses to change
unpredictably. Use this command only when no host systems are
expecting devices to remain at their current addresses. The SNC 4000
must be rebooted after executing this command.