The items which can be specified to the Tier pool are as follows.
Item | Specification | Explanation |
|---|---|---|
Tier Pool Name | Required | This is a name of the Tier pool. |
Policy Name | Optional | This is the Tiering policy that is associated with the Tier pool. |
Warning Threshold of Pool | Optional | This is the threshold (%) of the usage rate of the Tier pool in order to monitor the available capacity of the Tier pool. It is necessary to specify a value that is greater than Caution Threshold of Pool. |
Caution Threshold of Pool | Optional | This is the threshold (%) of the usage rate of the Tier pool in order to monitor the available capacity of the Tier pool. It is necessary to specify a value that is smaller than Warning Threshold of Pool. It is also possible to not configure this item. |
Encryption Status | Required | This is the configuration for whether or not the Tier pool is to be encrypted. |
Specify a Master CM | Optional | This is the specification of the Master CM of a Tier pool. |
Number of Tiers | Optional | This is the number of layers. A setting of either 2 or 3 can be specified. When "2" is specified, it is necessary to create 2 sub-pools (Low / High). |
Disk Selection | Optional | This is the selection method of the disks that configure the sub-pools. There is automatic selection (Auto) and manual selection (Manual). When the storage device is ETERNUS DX80 S2/DX90 S2, DX400 S2 series, DX8000 S2 series, in order to specify automatic selection (Auto), it is required that the firmware is V10L50 or later. |
*1: When a specification is omitted for the item of which specification is "Optional", a default value will be configured.
Item | Specification | Explanation |
|---|---|---|
FTSP Name | Optional | This is a name of the sub-pool. |
Disk Type | Required | These are the types of disks that configure the sub-pool. Online, Nearline, SSD, or SED-SAS can be selected. When the storage device is ETERNUS DX80 S2/DX90 S2, DX400 S2 series, DX8000 S2 series, in order to utilize SED-SAS, it is required that the firmware is V10L30 or later. |
Reliability | Required | This is the RAID level of the sub-pool. |
Minimum Required Capacity | Required | This is the Minimum Required Capacity as a sub-pool. When automatic selection (Auto) has been specified for Disk Selection of "Basic Configuration Items of Tier Pool", specification of this item is necessary. |
Disk | Required | These are the disks of the RAID group that configure the sub-pool. When manual selection (Manual) has been specified for Disk Selection of "Basic Configuration Items of Tier Pool", specification of this item is necessary. |
Stripe Depth | Optional | This is the size (KB) per disk in 1 stripe of the RAID groups configuring the sub-pool. When manual selection (Manual) has been specified for Disk Selection of "Basic Configuration Items of Tier Pool", it is possible to specify this item. |
Specify a CM | Optional | This is the specification of the Master CM of the RAID group configuring the sub-pool. |
*1: When a specification is omitted for the item of which specification is "Optional", a default value will be configured.
Refer to "Create Tier Pool" in the ETERNUS SF Web Console Guide for information on how to create a Tier pool.
Point
Multiple Tier pools can be created in one ETERNUS SF system.
Only one Tiering policy can be configured to one Tier pool.
It is also possible to recycle the made Tier pool having registered the storage device. Refer to "3.5.2 Recycling of Tier Pool Made in Storage Device" for details.
