SANtricity 11.8 Solutions
Provision storage in the plugin
To provision storage, you create volumes, assign volumes to hosts, and then assign volumes to datastores.
Step 1: Create volumes
Volumes are data containers that manage and organize the storage space on your storage system. You create volumes from the storage capacity available on your storage system, which helps organize your system’s resources. The concept of "volumes" is similar to using folders/directories on a computer to organize files for quick access.
Volumes are the only data layer visible to hosts. In a SAN environment, volumes are mapped to logical unit numbers (LUNs). These LUNs hold the user data that is accessible using one or more of the host access protocols supported by the storage system.
-
From the Manage page, select the storage system.
-
Select Provisioning > Manage Volumes.
-
Select Create > Volumes.
The Select Host dialog box appears.
-
From the drop-down list, select a specific host or host cluster to which you want to assign volumes, or choose to assign the host or host cluster at a later time.
-
To continue the volume creation sequence for the selected host or host cluster, click Next.
The Select Workload dialog box appears. A workload contains volumes with similar characteristics, which are optimized based on the type of application the workload supports. You can define a workload or you can select existing workloads.
-
Do one of the following:
-
Select the Create volumes for an existing workload option and then select the workload from the drop-down list.
-
Select the Create a new workload option to define a new workload for a supported application or for “Other” applications, and then following these steps:
-
From the drop-down list, select the name of the application you want to create the new workload for. Select one of the “Other” entries if the application you intend to use on this storage system is not listed.
-
Enter a name for the workload you want to create.
-
-
-
Click Next. If your workload is associated with a supported application type, enter the information requested; otherwise, go to the next step.
The Add/Edit Volumes dialog box appears. In this dialog, you create volumes from eligible pools or volume groups. For each eligible pool and volume group, the number of drives available and the total free capacity appears. For some application-specific workloads, each eligible pool or volume group shows the proposed capacity based on the suggested volume configuration and shows the remaining free capacity in GiB. For other workloads, the proposed capacity appears as you add volumes to a pool or volume group and specify the reported capacity.
-
Before you begin adding volumes, read the guidelines in the following table.
Field Description Free capacity
Because volumes are created from pools or volume groups, the pool or volume group you select must have sufficient free capacity.
Data Assurance (DA)
To create a DA-enabled volume, the host connection you are planning to use must support DA.
-
If you want to create a DA-enabled volume, select a pool or volume group that is DA capable (look for Yes next to "DA" in the pool and volume group candidates table).
-
DA capabilities are presented at the pool and volume group level. DA protection checks for and corrects errors that might occur as data is transferred through the controllers down to the drives. Selecting a DA-capable pool or volume group for the new volume ensures that any errors are detected and corrected.
-
If any of the host connections on the controllers in your storage system do not support DA, the associated hosts cannot access data on DA-enabled volumes.
Drive security
To create a secure-enabled volume, a security key must be created for the storage system.
-
If you want to create a secure-enabled volume, select a pool or volume group that is secure capable (look for Yes next to "Secure-capable" in the pool and volume group candidates table).
-
Drive security capabilities are presented at the pool and volume group level. Secure-capable drives prevent unauthorized access to the data on a drive that is physically removed from the storage system. A secure-enabled drive encrypts data during writes and decrypts data during reads using a unique encryption key.
-
A pool or volume group can contain both secure-capable and non-secure-capable drives, but all drives must be secure-capable to use their encryption capabilities.
Resource provisioning
To create a resource-provisioned volume, all drives must be NVMe drives with the Deallocated or Unwritten Logical Block Error (DULBE) option.
-
-
Choose one of these actions based on whether you selected "Other" or an application-specific workload in the previous step:
-
Other – Click Add new volume in each pool or volume group that you want to use to create one or more volumes.
-
Application-specific workload – Either click Next to accept the system-recommended volumes and characteristics for the selected workload, or click Edit Volumes to change, add, or delete the system-recommended volumes and characteristics for the selected workload.
The following fields appear.
Field Description Volume Name
A volume is assigned a default name during the volume creation sequence. You can either accept the default name or provide a more descriptive one indicating the type of data stored in the volume.
Reported Capacity
Define the capacity of the new volume and the capacity units to use (MiB, GiB, or TiB). For thick volumes, the minimum capacity is 1 MiB, and the maximum capacity is determined by the number and capacity of the drives in the pool or volume group.
Capacity in a pool is allocated in 4-GiB increments. Any capacity that is not a multiple of 4 GiB is allocated but not usable. To make sure that the entire capacity is usable, specify the capacity in 4-GiB increments. If unusable capacity exists, the only way to regain it is to increase the capacity of the volume.Volume Type
If you selected "Application-specific workload," the Volume Type field appears. This indicates the type of volume that was created for an application-specific workload.
Volume Block Size (AB3100 and AB6100 only)
Shows the block sizes that can be created for the volume:
-
512 – 512 bytes
-
4K – 4,096 bytes
Segment Size
Shows the setting for segment sizing, which only appears for volumes in a volume group. You can change the segment size to optimize performance.
Allowed segment size transitions – The system determines the segment size transitions that are allowed. Allowed transitions usually are double or half of the current segment size. For example, if the current volume segment size is 32 KiB, a new volume segment size of either 16 KiB or 64 KiB is allowed.
SSD Cache-enabled volumes – You can specify a 4-KiB segment size for SSD Cache-enabled volumes. Make sure you select the 4-KiB segment size only for SSD Cache-enabled volumes that handle small-block I/O operations (for example, 16 KiB I/O block sizes or smaller). Performance might be impacted if you select 4 KiB as the segment size for SSD Cache-enabled volumes that handle large block sequential operations.
Amount of time to change segment size – The amount of time to change a volume’s segment size depends on these variables:
-
The I/O load from the host
-
The modification priority of the volume
-
The number of drives in the volume group
-
The number of drive channels
-
The processing power of the storage system controllers
When you change the segment size for a volume, I/O performance is affected, but your data remains available.
Secure-capable
Yes appears next to "Secure-capable" only if the drives in the pool or volume group are encryption-capable.
Drive Security prevents unauthorized access to the data on a drive that is physically removed from the storage system. This option is available only when the Drive Security feature has been enabled, and a security key is set up for the storage system.
A pool or volume group can contain both secure-capable and non-secure-capable drives, but all drives must be secure-capable to use their encryption capabilities.DA
Yes appears next to "DA" only if the drives in the pool or volume group support Data Assurance (DA).
DA increases data integrity across the entire storage system. DA enables the storage system to check for errors that might occur as data is transferred through the controllers down to the drives. Using DA for the new volume ensures that any errors are detected. -
-
-
To continue the volume creation sequence for the selected application, click Next.
-
In the last step, review a summary of the volumes you intend to create and make any necessary changes. To make changes, click Back. When you are satisfied with your volume configuration, click Finish.
Step 2: Create host access and assign volumes
A host can be created automatically or manually:
-
Automatic — Automatic host creation for SCSI-based (not NVMe-oF) hosts is initiated by the Host Context Agent (HCA). The HCA is a utility that you can install on each host attached to the storage system. Each host that has the HCA installed pushes its configuration information to the storage system controllers through the I/O path. Based on the host information, the controllers automatically create the host and the associated host ports and set the host type. If needed, you can make any additional changes to the host configuration. After the HCA performs its automatic detection, the host is automatically configured with the following attributes:
-
The host name derived from the system name of the host.
-
The host identifier ports that are associated with the host.
-
The Host Operating System Type of the host.
-
| Host Context Agent software for Linux and Windows is available from the DVD included in the Product. |
| Hosts are created as stand-alone hosts; the HCA does not automatically create or add to host clusters. |
-
Manual – During manual host creation, you associate host port identifiers by selecting them from a list or manually entering them. After you create a host, you can assign volumes to it or add it to a host cluster if you plan to share access to volumes.
Using the HCA to auto-discover the host
You can allow the Host Context Agent (HCA) to automatically detect the hosts, and then verify that the information is correct.
-
From the Manage page, select the storage system with the host connection.
-
Select Provisioning > Configure Hosts.
The Configure Hosts page opens.
-
Select Storage > Hosts.
The table lists the automatically created hosts.
-
Verify that the information provided by the HCA is correct (name, host type, host port identifiers).
-
If you need to change any of the information, select the host, and then click View/Edit Settings.
Manually creating the host
Read the following guidelines:
-
You must already have added or discovered storage systems within your environment.
-
You must define the host identifier ports that are associated with the host.
-
Make sure that you provide the same name as the host’s assigned system name.
-
This operation does not succeed if the name you choose is already in use.
-
The length of the name cannot exceed 30 characters.
-
From the Manage page, select the storage system with the host connection.
-
Select Provisioning > Configure Hosts.
The Configure Hosts page opens.
-
Click Create > Host.
The Create Host dialog box appears.
-
Select the settings for the host as appropriate.
Field Description Name
Type a name for the new host.
Host operating system type
Select the operating system that is running on the new host from the drop-down list.
Host interface type
(Optional) If you have more than one type of host interface supported on your storage system, select the host interface type that you want to use.
Host ports
Do one of the following:
-
Select I/O Interface — Generally, the host ports should have logged in and be available from the drop-down list. You can select the host port identifiers from the list.
-
Manual add — If a host port identifier is not displayed in the list, it means that the host port has not logged in. An HBA utility or the iSCSI initiator utility may be used to find the host port identifiers and associate them with the host.
You can manually enter the host port identifiers or copy/paste them from the utility (one at a time) into the Host ports field.
You must select one host port identifier at a time to associate it with the host, but you can continue to select as many identifiers that are associated with the host. Each identifier is displayed in the Host ports field. If necessary, you also can remove an identifier by selecting the X next to it.
Set CHAP initiator secret
(Optional) If you selected or manually entered a host port with an iSCSI IQN, and if you want to require a host that tries to access the storage system to authenticate using Challenge Handshake Authentication Protocol (CHAP), select the Set CHAP initiator secret checkbox. For each iSCSI host port you selected or manually entered, do the following:
-
Enter the same CHAP secret that was set on each iSCSI host initiator for CHAP authentication. If you are using mutual CHAP authentication (two-way authentication that enables a host to validate itself to the storage system and for a storage system to validate itself to the host), you also must set the CHAP secret for the storage system at initial setup or by changing settings.
-
Leave the field blank if you do not require host authentication.
Currently, the only iSCSI authentication method used is CHAP.
-
-
Click Create.
-
If you need to update the host information, select the host from the table and click View/Edit Settings.
After the host is successfully created, the system creates a default name for each host port configured for the host (user label). The default alias is
<Hostname_Port Number>. For example, the default alias for the first port created for host IPT isIPT_1. -
Next, you must assign a volume to a host or a host cluster so it can be used for I/O operations. Select Provisioning > Configure Hosts.
The Configure Hosts page opens.
-
Select the host or host cluster to which you want to assign volumes, and then click Assign Volumes.
A dialog box appears that lists all the volumes that can be assigned. You can sort any of the columns or type something in the Filter box to make it easier to find particular volumes.
-
Select the check box next to each volume that you want to assign or select the check box in the table header to select all volumes.
-
Click Assign to complete the operation.
The system performs the following actions:
-
The assigned volume receives the next available LUN number. The host uses the LUN number to access the volume.
-
The user-supplied volume name appears in volume listings associated to the host. If applicable, the factory-configured access volume also appears in volume listings associated to the host.
-
Step 3: Create a datastore in vSphere Client
To create a datastore in the vSphere Client, see the Create a VMFS Datastore in the vSphere Client topic in the VMware Doc Center.
Increase capacity of existing datastore by increasing volume capacity
You can increase the reported capacity (the capacity reported to hosts) of a volume by using the free capacity that is available in the pool or volume group.
Make sure that:
-
Enough free capacity is available in the volume’s associated pool or volume group.
-
The volume is Optimal and not in any state of modification.
-
No hot spare drives are in use in the volume. (Applies only to volumes in volume groups.)
| Increasing the capacity of a volume is supported only on certain operating systems. If you increase the volume capacity on a host operating system that does not support LUN expansion, the expanded capacity is unusable, and you cannot restore the original volume capacity. |
-
Navigate to the plugin within vSphere Client.
-
Within the plugin, select the desired storage system.
-
Click on Provisioning and select Manage Volumes.
-
Select the volume for which you want to increase capacity, and then select Increase Capacity.
The Confirm Increase Capacity dialog box appears.
-
Select Yes to continue.
The Increase Reported Capacity dialog box appears.
This dialog box displays the volume’s current reported capacity and the free capacity available in the volume’s associated pool or volume group.
-
Use the Increase reported capacity by adding… box to add capacity to the current available reported capacity. You can change the capacity value to display in either mebibytes (MiB), gibibytes (GiB), or tebibytes (TiB).
-
Click Increase.
-
View the Recent Tasks pane for the progress of the increase capacity operation that is currently running for the selected volume. This operation can be lengthy and could affect system performance.
-
After the volume capacity is complete, you must manually increase the VMFS size to match as described in the Increase VMFS Datastore Capacity in the vSphere Client topic under the VMware Doc Center.
Increase capacity of existing datastore by adding volumes
-
You can increase the capacity of a datastore by adding volumes. Follow the steps in Step 1: Create volumes.
-
Next, assign the volumes to the desired host to increase the datastore’s capacity.
See the Increase VMFS Datastore Capacity in the vSphere Client topic under the VMware Doc Center for more information.
