HP 3000 Enterprise Virtual Array - Manual (Page 45)

3 Enterprise Virtual Array
operation
This chapter presents the tasks that you might need to perform during normal operation of the storage
system.
Best practices
For useful information on managing and configuring your storage system, refer to the HP
StorageWorks Enterprise Virtual Array configuration best practices white paper available from
http://h71028.www7.hp.com/ERC/downloads/5982-9140EN.pdf .
Operating tips and information
Reserving adequate free space
To ensure efficient storage system operation, a certain amount of unallocated capacity, or free space,
should be reserved in each disk group. The recommended amount of free space is influenced by your
system configuration. For guidance on how much free space to reserve, refer to the HP StorageWorks
Enterprise Virtual Array configuration best practices white paper. See Best practices .
Using FATA disk drives
FATA drives are designed for lower duty cycle applications such as near online data replication for
back-up. These drives should not be used as a replacement for EVA's high performance, standard
duty cycle, Fibre Channel drives. Doing so could shorten the life of the drive. Download the following
document for more information on FATA drives, their uses and benefits:
http://h71028.www7.hp.com/ERC/downloads/5982-7353EN.pdf
Failback preference setting for HSV controllers
Table 2 describes the failback preference mode for each of the operating systems supported with HSV
controllers and Command View EVA.
Table 3 describes the failback default behavior and settings allowed for each operating system. The table
indicates when Secure Path is used in conjunction with the operating system
Enterprise Virtual Array 3000/5000 user guide (VCS 3.110) 45