Fujitsu ETERNUS DX S5 Series, Руководство по конструкции

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Threshold Monitoring of Used Capacity
When the used capacity of an FTRP or an FTV reaches the threshold, an alarm notification can be sent from
ETERNUS SF Storage Cruiser. There are two types of thresholds: "Attention" and "Warning". A different value
can be specified for each threshold type.
Make sure to add drives before free space in the FTRP runs out, and add FTSP capacity from ETERNUS SF
Storage Cruiser.
• FTRP Thresholds
There are two FTRP usage thresholds: Attention and Warning.
Table 35 FTRP Thresholds
Threshold Selectable range Default Setting conditions
Attention 5 (%) – 80 (%) 75 (%) Attention threshold
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Warning threshold
The "Attention" threshold can be omitted.
Warning 5 (%) – 99 (%) 90 (%)
• FTV Thresholds
There is only one FTV usage threshold: Attention. If there is insufficient capacity for the FTV unallocated
space in the pool free space, an alarm notification is sent. The threshold is determined by the ratio of free
space in the FTSP and the unallocated FTV capacity.
Table 36 FTV Thresholds
Threshold Selectable range Default
Attention 1 (%) – 100 (%) 80 (%)
Caution
•
When the Flexible Tier function is enabled, 64 work volumes (physical capacity is 0MB) are created.
The maximum number of volumes that can be created in the ETERNUS DX decreases by the number
of work volumes that are created.
•
If an FTSP or an FTRP includes one or more RAID groups that are configured with Advanced Format
drives, the write performance may be reduced when accessing FTVs created in the relevant FTSP or
FTRP from an OS or an application that does not support Advanced Format.
•
The FTRP capacity that can be used for VVOLs differs from the maximum Thin Provisioning Pool
capacity. For details, refer to
"VMware VVOL" (page 151) .
2. Basic Functions
Operations Optimization (Virtualization/Automated Storage Tiering)
69 Design Guide