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mapCompressDatabase
Compressing the map database will cause device addresses to
CAUTION
change unpredictably. Use this command only when no host systems
are expecting devices to remain at their current addresses.
Occasionally, it may be necessary to eliminate inactive entries and reorder the active entries in the
Persistent Device Map database. The mapCompressDatabase command removes entries for devices that
are no longer present and reassigns existing device entries to new addresses. The devices will be assigned
new addresses immediately and hosts must rescan for devices or be rebooted.
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.
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 must reassign SFM access
permissions between the hosts and LUNs.
SNC4000 > mapCompressDatabase
CAUTION: This command will compress the Persistent Device Map.
Existing SFM Access Settings may become invalid and should be cleared
because LUN assignments may change!
Do you want to compress the Device Map? (y or n) y
0xc1689ac0 (tShell): Wrote 23 device maps to file 'nvfs:config/device.map'
Device Map Compressed
- Do you want to clear SFM Access Settings? (y or n) y
SFM Access Cleared
value = 23 = 0x17
If you have not been using SFM, the output of this command will not reference SFM.
SNC4000 > mapCompressDatabase
This command will compress the Persistent Device Map.
Do you want to compress the Device Map? (y or n) y
0xc1689ac0 (tShell): Wrote 23 device maps to file 'nvfs:config/device.map'
Device Map Compressed
value = 23 = 0x17
mapHelp
The mapHelp command displays a list of the persistent address map database commands.
SNC4000 > mapHelp
mapCompressDatabase - Compress Device Map Database
(reboot required)
mapRebuildDatabase - Rebuild Device Map Database (reboot required)
mapShowDatabase
mapShowDevs
mapWinnowDatabase - Remove unattached devices from database
See User's Guide for more information
value = 0 = 0x0
SNC >
94
- Show the Map Database
- Show currently attached devices
Service Port Command Reference
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