DELL MD3220 사용자 설명서

Configuration: Disk Groups and Virtual Disks

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.
Whenever the power is turned off and turned on again, all of the security-

enabled physical disks change to a security locked state. In this state, the data 

is inaccessible until the correct security key is provided by a RAID controller 

module.
You can view the self encrypting disk status of any physical disk in the storage 

array from the Physical Disk Properties dialog. The status information reports 

whether the physical disk is:

• Security Capable
• Secure—Security enabled or disabled
• Read/Write Accessible—Security locked or unlocked

You can view the self encrypting disk status of any disk group in the storage 

array. The status information reports whether the storage array is:

• Security Capable
• Secure

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