Dell PowerVault MD3260i - Manual (Page 189)

• The identifier of the snapshot image.
For example, if you want to create a snapshot virtual disk named snapData1, using the most recent snapshot image in a
snapshot group that has the name snapGroup1, with a maximum fill limit of 80 percent for the repository virtual disk, you
would use this command:
create snapVirtualDisk userLabel="snapData1" snapImageID="snapGroup1:newest"
repositoryVirtualDisk="repos_1234" repositoryFullLimit=80;
The repository virtual disk identifier is automatically created by the MD storage management software and the firmware
when you create a new snapshot group. You cannot rename the repository virtual disk because renaming the repository
virtual disk will break the linkage with the snapshot images.
Create SSD Cache
Description
This command creates a read cache for a storage array using Solid State Disks (SSDs). Using high performance SSDs to
cache read data improves the application I/O performance and response times, and delivers sustained performance
improvement across different workloads, especially for high-IOP workloads. SSD cache maximizes the use of expensive
fast SSDs.
SSD cache works in addition to the primary cache in the RAID controller module DRAM. With RAID controller module
cache, the data is stored in DRAM after a host read. With SSD cache, the data is copied from user specified base virtual
disks, and then cached on SSDs.
Syntax
create ssdCache userLabel="ssdCacheName"
physicalDisks=(enclosureID1,drawerID1,slotID1 ...
enclosureIDn,drawerIDn,slotIDn)
[updateExistingVirtualDisks=(TRUE|FALSE)]
Parameters
Parameter Description
userLabel The alphanumeric identifier (including - and _) that you
want to name the new SSD cache. Enclose the identifier in
double quotation marks (" ").
You can use any combination of alphanumeric characters,
underscore (_), hyphen (-), and pound (#) for the identifier.
Identifiers can have a maximum of 30 characters.
physicalDisks The physical disks that you want to use to create the SSD
cache. For high-capacity expansion enclosures, specify
the enclosure ID value, the drawer ID value, and the slot
ID value for each physical disk that you want to assign to
the SSD cache. For low-capacity expansion enclosures,
specify the enclosure ID value and the slot ID value for
each physical disk that you assign to the SSD cache.
Enclosure ID values are 0 to 99. Drawer ID values are 0
to 4. Slot ID values are 0 to 31. Enclose the enclosure ID
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