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Figure 8-1
Storage Architecture of Thick Provisioning Pool
Disk drives can be added to a thick provisioning pool at any time to increase the capacity of
the pool, no matter the disk drives are from the head SAN system or from expansion
enclosures. Or disk drives can be added to upgrade the RAID level in a thick provisioning
pool. These operations are called migrate. For example, it can migrate RAID 5 to RAID 6 by
adding disk drives because RAID 6 needs one more disk drive for parity.
A thick provisioning pool contains up to 64 disk drives. For more information about pool
operation, please refer to the chapter 8.4,
Table 8-3
Thick Provisioning Pool Parameters
Item
Value
Maximum Disk Drive Quantity in a Thick Provisioning Pool
(Include Dedicated Spares)
64
Maximum Pool Quantity per System
64
Maximum Dedicated Spare Quantity in a Pool
8
8.2.2.
Volume Technology
A volume is a logical disk that is presented to a host system. The capacity is provided by
pool. Each pool can be divided into several volumes. The volumes in one pool share the
same RAID level, but may have different volume capacity.
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