Dell PowerVault MD3220i Owner's Manual - Page 113
Choosing an Appropriate Physical Disk Type, Physical Disk Security with Self Encrypting Disk - ssd
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NOTE: If you selected the Custom option, select your preferred dynamic cache read prefetch setting (enabled/disabled) and segment size (8KB to 512KB). 2 Click OK. Choosing an Appropriate Physical Disk Type You can create disk groups and virtual disks in the storage array. You must select the capacity that you want to allocate for the virtual disk from either unconfigured capacity or free capacity available in the storage array. Then you define basic and optional advanced parameters for the virtual disk. With the advent of different physical disk technologies, it is now possible to mix physical disks with different media types and different interface types within a single storage array. In this release of MDSM, the following media types are supported: • Hard physical disk • Solid State Disk (SSD) Physical Disk Security with Self Encrypting Disk Self encrypting disk (SED) technology prevents unauthorized access to the data on a physical disk that is physically removed from the storage array. The storage array has a security key. Self encrypting disks provide access to data only through an array that has the correct security key. The self encrypting disk or a security capable physical disk encrypts data during writes and decrypts data during reads. For more information, see the PowerVault Modular Disk Storage Manager online help topics. You can create a secure disk group from security capable physical disks. When you create a secure disk group from security capable physical disks, the physical disks in that disk group become security enabled. When a security capable physical disk has been security enabled, the physical disk requires the correct security key from a RAID controller module to read or write the data. All of the physical disks and RAID controller modules in a storage array share the same security key. The shared security key provides read and write access to the physical disks, while the physical disk encryption key on each physical disk is used to encrypt the data. A security capable physical disk works like any other physical disk until it is security enabled. Configuration: Disk Groups and Virtual Disks 113