Adaptec 7220ss Guía Del Usuario
A-11
Storage Concepts
Applications Suitable for Mirror Sets
Mirror sets are particularly suitable for the following types of
applications:
applications:
■
Data for which reliability and availability requirements are the
first priority
first priority
■
Backing up of online data with minimum application downtime
RAID 5
The RAID 5 set uses parity to provide redundancy. RAID 5 disk
drives may operate independently of each other allowing multiple
simultaneous read and write operations. Parity is distributed
across all the disk drives in the array rather than residing on a
single drive.
drives may operate independently of each other allowing multiple
simultaneous read and write operations. Parity is distributed
across all the disk drives in the array rather than residing on a
single drive.
A RAID 5 set is made up of at least three equal-sized partitions on
different disk drives. The data is striped evenly across its
respective disk drives in equal-sized chunks
different disk drives. The data is striped evenly across its
respective disk drives in equal-sized chunks
, with one chunk of each
stripe used for parity data
. This permits the storage system to rebuild
the data if one drive fails.
represents a RAID 5 set made up of four partitions, each
on different disk drives. The free space of the larger drive is not
used.
used.