Hewlett Packard Enterprise HPE XP7, Руководство пользователя, Страница: 188 / 311

The pool capacity required for resolving SIMs is calculated as follows:
required-capacity = (capacity-used-by-pool / pool-threshold) - pool-capacity-before-expansion
When you expand a pool using LDEVs created from parity groups of which capacity expansion is
enabled, the total amount of the LDEVs should meet the following conditions:
total-capacity-of-LDEVs-to-be-created ≤ (physical-amount-of-parity-group / (1 –deletion-rate)) –
- capacity-of-pool-volumes-belonging-to-applicable-parity-group-of-pool-before-expansion
Determine whether to expand a pool by comparing the results calculated by using the above formulas.
When
required-capacity ≤ total-capacity-of-LDEVs-to-be-created
The insufficient capacity can be reserved by using the available capacity in a parity group of which
capacity expansion is enabled.
When
required-capacity > total-capacity-of-LDEVs-to-be-created
To reserve the insufficient capacity, add a parity group to create an LDEV, and then expand the pool.
Note that the threshold and the deletion rate used for the calculation are expressed as a fraction
converted from a percent. For example, if the threshold is 80%, enter 80/100 as the pool threshold for the
calculation.
Workflow to perform when SIMs related to the capacity ensured for writing were
reported
The following figures explain how to take action when 604 xxx , 605 xxx , or 606 xxx has occurred.
188 Workflow to perform when SIMs related to the capacity ensured for writing were reported