EMC Symmetrix DMX-3, Product Manual

Page: 130 / 326

130 EMC Symmetrix DMX-3 Product Guide
Performance and Optimization
Figure 33 Concatenated volumes
Striped data
Metavolume addressing by striping also joins multiple slices to form
a single volume. However, instead of using sequential address space,
striped volumes use addresses that are interleaved between slices
Figure 34 on page 130 . In data striping, equal size stripes of data from
each participating drive are written alternately to each member of the
set.
Figure 34 Striped data
Configuring metavolumes
Although members of a striped set do not have to be the same size,
the effective size of each member is the actual size of the smallest
member rounded down to an even cylinder count. Therefore, when
configuring such a metavolume, be careful to minimize wasted space.
Head
Device
Member
Device
Member
Device
Tail
Device
Head
device
Member
device
Member
device
Tail
device