SANtricity 11 Manuals (CA08872-010)
Create volumes
You create volumes to add storage capacity to an application-specific workload, and to make the created volumes visible to a specific host or host cluster. In addition, the volume creation sequence provides options to allocate specific amounts of capacity to each volume you want to create.
Most application types default to a user-defined volume configuration. Some application types have a smart configuration applied at volume creation. For example, if you are creating volumes for Microsoft Exchange application, you are asked how many mailboxes you need, what your average mailbox capacity requirements are, and how many copies of the database you want. SANtricity System Manager uses this information to create an optimal volume configuration for you, which can be edited as needed.
The process to create a volume is a multi-step procedure.
Step 1: Select host for a volume
You create volumes to add storage capacity to an application-specific workload, and to make the created volumes visible to a specific host or host cluster. In addition, the volume creation sequence provides options to allocate specific amounts of capacity to each volume you want to create.
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Valid hosts or host clusters exist under the Hosts tile.
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Host port identifiers have been defined for the host.
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Before creating a DA-enabled volume, the host connection you are planning to use must support DA. 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.
Keep these guidelines in mind when you assign volumes:
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A host’s operating system can have specific limits on how many volumes the host can access. Keep this limitation in mind when you create volumes for use by a particular host.
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You can define one assignment for each volume in the storage system.
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Assigned volumes are shared between controllers in the storage system.
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The same logical unit number (LUN) cannot be used twice by a host or a host cluster to access a volume. You must use a unique LUN.
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If you want to speed the process for creating volumes, you can skip the host assignment step so that newly created volumes are initialized offline.
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Assigning a volume to a host will fail if you try to assign a volume to a host cluster that conflicts with an established assignment for a host in the host clusters. |
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Select Storage > Volumes .
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Select Create > Volume .
The Create Volumes dialog box appears.
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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.
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To continue the volume creation sequence for the selected host or host cluster, click Next, and go to Step 2: Select a workload for a volume.
The Select Workload dialog box appears.
Step 2: Select a workload for a volume
Select a workload to customize the storage system configuration for a specific application, such as Microsoft SQL Server, Microsoft Exchange, Video Surveillance applications, or VMware. You can select "Other application" if the application you intend to use on this storage system is not listed.
This task describes how to create volumes for an existing workload.
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When you are creating volumes using an application-specific workload, the system may recommend an optimized volume configuration to minimize contention between application workload I/O and other traffic from your application instance. You can review the recommended volume configuration and edit, add, or delete the system-recommended volumes and characteristics using the Add/Edit Volumes dialog box.
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When you are creating volumes using "Other" applications (or applications without specific volume creation support), you manually specify the volume configuration using the Add/Edit Volumes dialog box.
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Do one of the following:
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Select the Create volumes for an existing workload option to create volumes for an existing workload.
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Select the Create a new workload option to define a new workload for a supported application or for "Other" applications.
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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.
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Enter a name for the workload you want to create.
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Click Next.
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If your workload is associated with a supported application type, enter the information requested; otherwise, go to Step 3: Add or edit volumes.
Step 3: Add or edit volumes
SANtricity System Manager may suggest a volume configuration based on the application or workload you selected. This volume configuration is optimized based on the type of application the workload supports. You can accept the recommended volume configuration or you can edit it as needed. If you selected one of the "Other" applications, you must manually specify the volumes and characteristics you want to create.
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The pools or volume groups must have sufficient free capacity.
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The maximum number of volumes allowed in a volume group is 256.
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The maximum number of volumes allowed in a pool depends on the storage system model:
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2,048 volumes (AB6100 and HB5100/HB5200 series)
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1,024 volumes (AB3100)
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512 volumes (HB2100/HB2200/HB2300 series)
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256 volumes (HB1100 and HB1200)
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To create a Data Assurance (DA)-enabled volume, the host connection you are planning to use must support DA.
Selecting a secure-capable pool or volume group
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 in SANtricity System Manager. 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.
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To create a secure-enabled volume, a security key must be created for the storage system.
Selecting a secure-capable pool or volume group
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 in SANtricity System Manager. 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.
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To create a resource-provisioned volume, all drives must be NVMe drives with the Deallocated or Unwritten Logical Block Error (DULBE) option.
You create volumes from pools or volume groups. The Add/Edit Volumes dialog box shows all eligible pools and volume groups on the storage system. 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.
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Choose one of these actions based on whether you selected Other or an application-specific workload:
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Other
Click Add new volume in each pool or volume group that you want to use to create one or more volumes.Field details
Field Description Volume Name
A volume is assigned a default name by System Manager 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.
Keep in mind that storage capacity is also required for copy services (snapshot images, snapshot volumes, volume copies, and remote mirrors); therefore, do not allocate all of the capacity to standard volumes.
Capacity in a pool is allocated in 4-GiB or 8-GiB increments, depending on your drive type. Any capacity that is not a multiple of 4- or 8-GiB is allocated but not usable. To make sure that the entire capacity is usable, specify the capacity in 4-GiB or 8-GiB increments. If unusable capacity exists, the only way to regain it is to increase the capacity of the volume.
Volume Block Size (AB3100 and AB6100 only)
Shows the block sizes that can be created for the volume:
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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
System Manager determines the segment size transitions that are allowed. Segment sizes that are inappropriate transitions from the current segment size are unavailable on the drop-down list. 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
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The modification priority of the volume
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The number of drives in the volume group
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The number of drive channels
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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 secure-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.
Resource provisioned (AB3100 and AB6100 only)
Yes appears next to "Resource provisioned" only if the drives support this option. Resource Provisioning is a feature available in the AB3100 and AB6100 storage systems, which allows volumes to be put in use immediately with no background initialization process.
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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.Field details
Field Description Volume Name
A volume is assigned a default name by SANtricity System Manager 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.
Keep in mind that storage capacity is also required for copy services (snapshot images, snapshot volumes, volume copies, and remote mirrors); therefore, do not allocate all of the capacity to standard volumes.
Capacity in a pool is allocated in 4-GiB or 8-GiB increments, depending on your drive type. Any capacity that is not a multiple of 4- or 8-GiB is allocated but not usable. To make sure that the entire capacity is usable, specify the capacity in 4-GiB or 8-GiB increments. If unusable capacity exists, the only way to regain it is to increase the capacity of the volume.
Volume Type
Volume type 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:
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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
SANtricity System Manager determines the segment size transitions that are allowed. Segment sizes that are inappropriate transitions from the current segment size are unavailable on the drop-down list. 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
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The modification priority of the volume
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The number of drives in the volume group
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The number of drive channels
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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 secure-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.
Resource provisioned (AB3100 and AB6100 only)
Yes appears next to "Resource Provisioned" only if the drives support this option. Resource Provisioning is a feature available in the AB3100 and AB6100 storage systems, which allows volumes to be put in use immediately with no background initialization process.
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To continue the volume creation sequence for the selected application, click Next, and go to Step 4: Review volume configuration.
Step 4: Review volume configuration
Review a summary of the volumes you intend to create and make any necessary changes.
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Review the volumes you want to create. Click Back to make any changes.
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When you are satisfied with your volume configuration, click Finish.
SANtricity System Manager creates the new volumes in the selected pools and volume groups, and then displays the new volumes in the All Volumes table.
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Perform any operating system modifications necessary on the application host so that the applications can use the volume.
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Run the operating system-specific utility (available from a third-party vendor), and then run the SMcli command
-identifyDevicesto correlate volume names with host storage system names.The SMcli is available directly through the SANtricity System Manager. This downloadable version of the SMcli is available on ETERNUS AB6100, EF300, AB3100, HB5x00, AB5100, E2800, and AB2100 controllers. To download the SMcli within the SANtricity System Manager, select Settings > System and Add-ons > Command Line Interface .
