Installing the A4800A Adapter
Looking at Adapter Installation
During a card replacement operation, SAM performs a Critical Resource Analysis, which checks all ports on the target card for critical resources that would be temporarily unavailable while the card is shut down.
Planning and Preparation
SAM will, generally, prevent you from performing OLAR procedures that would adversely affect other areas of the server. Refer to Configuring
Critical Resources Because power to the slot must be off when the old card is removed and the new card is inserted, the effects of shutting down the card’s functions must be carefully considered.
This is particularly important if there is no
•Which mass storage devices will be temporarily disconnected when the card is shut down?
•Will a critical networking connection be lost?
A critical resource is one that would cause a system crash or prevent the operation from successfully completing if the resource were temporarily suspended or disconnected. For example, if the SCSI adapter to be replaced connects to the unmirrored root disk or swap space, the system will crash when the card is shut down.
During an OLAR procedure, it is essential to check the targeted card for critical resources, as well as the effects of existing disk mirrors and other situations where a card’s functions can be taken over by another card that will not be affected.
Fortunately SAM performs a thorough critical resource analysis automatically, and presents options to you based on its findings. If you determine that critical resources will be affected by the procedure, you should replace the card when the server is
If you must take action immediately, you can use rad to attempt an
20 | Chapter 2 |