Installation guide

2-3
Bull S.A. May 25th, 1999
1.3.2 Installation
1. Start by installing or updating the lpps DiskArray, ArrayGUIde, DasEmail:
# smit install_latest
Execute the procedure described in the ”Configuring and Managing a DAS” manual.
2. If your DAS subsystem does not yet have the latest LIC Firmware 9.xx release
installed, you must download it. Refer to the DAS documentation.
It is mandatory to disable cache and to verify there are no dirty pages before installing a
new version of flare Firmware.
After downloading a new version of flare Firmware, you should update the PROM code.
1.3.3 Notes After Installation
• If for any reason you need to disconnect the Y SCSI cable from your system, do not
forget to reinstall the terminators on the adapter board, or your system will not reboot.
• In a random I/O application with Raid5, it is recommended to configure 8 MB in Write
Cache for better performance.
• We recommend that you reboot the host after successfully binding the DAS disks.
• LUN Auto-assign parameter — The storage-system Auto-assign value for each LUN
must be disabled. You can use your storage system manager to make sure that each
LUN has its Auto-assign option disabled.
• ArrayGUIde implements a configuration editor to edit and create a configuration file (type
the edit_cfg command).
• Do not leave dassmgr running if you do not need it,
because it is CPU consuming.
1.4 DiskArray Restrictions and Limitations
• Do not add any LUN in rootvg.
• Changing the console baud rate menu must not be used: only the default baud rate
(9600 bauds) is valid.
• The file systems that were working during an SP failure, need a complete fsck.
Sometimes disks will be rebuilt; in this case, it is necessary to wait for the end of the
rebuilding process before running fsck.
• ”Read Cache Statistics” are updated only when ”Write Cache” is enabled.
They are not
updated when only ”Read Cache” is enabled.
1.5 ArrayGUIde Restrictions and Limitations
• The ArrayGUIde agent is not automatically launched at reboot.
• The mail notification is operational only if arraymgr is working .
• A remote user cannot modify the DAS configuration.
• If a ”busy” error is displayed when you try to de-configure an AIX hdisk or to create a
volume group, you should stop both the arraymgr and the agent before the
de-configuration operation.
• When you use ATF, and if there is a failover, the ArrayGUIde agent stops until the failure
is repaired.
• Changing LUN parameters can only be done for LUNs seen by the system.