Dell 8TB 7.2K RPM 512e NL-SAS 12Gb/s 3.5in Self-Encrypting Hard Drive in 14G PowerEdge LFF Tray Part #: 400-ASID / 400-ATKX / 0V7RN3 / V7RN3
- Brand: Dell
- Part #: 400-ASID
- Alt. Part #: 400-ATKX / 0V7RN3 / V7RN3
- Specs:-
- :: Capacity: 8TB
- :: Interface: Serial Attached SCSI (SAS 3)
- :: Enclosure: Internal
- :: Form Factor: 3.5in
- :: Spindle Speed: 7200 RPM
- :: External Data Transfer Rate: 12G = 12Gb/sec
- :: Seek Time: 4.16ms
- :: Condition: New
- :: Compatibility: Dell PowerEdge T40 / T140 / T340 / T350 / T550 / R240 / R340 / R350 / R440 / R450 / R540 / R550 / R640 / R650 / R650XS / R6525 / R740 / R740XD / R740XD2 / R750 / R750XS / R7515 / R7525 / R840 / C4140 / C6420 / C6525 / PowerVault ME4012 / ME4084 Systems
- :: MPN: 400-ASID
- Warranty: 1 (one) year Tekmart Africa warranty
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Key points to note on these 400-ASID Dell NL Self-Encrypting SAS Hard Drives:-
These SED drives are identified in the GUI with a gold key icon.
SEDs (self-encrypting drives) are disk drives that use an encryption key to secure the data stored on the disk. This encryption protects the array from data theft when a drive is removed from the array.
SED operates across all disks in an array at once. If one drive in a RAID set is removed from the array, a new set of encryption key shares is generated automatically and shared among the remaining disks. If a second drive is removed from the same RAID set, another set of encryption key shares is generated.
SED drives are configured at the factory. When the drives are installed into an array, the array automatically detects the new SED drives and locks them. This process is automatic; the GUI has no user controls for SED.
All of the drives in an array, including spares, must be of the same type and model, and must be running the same firmware or higher. A SED drive installed into a mixed-disk configuration, or a configuration containing unencrypted drives, operates as an unencrypted disk. Likewise, a pool consisting of all SED drives might replicate to a pool with only a few SED drives or no SED drives at all.
Each array has an overall shared encryption key that protects data on all of the disks in that array.
The shared encryption key is not stored in any one location on the array. Instead, the key is divided into portions called key shares. The number of key shares generated corresponds to the number of drives in the array (except for spares or other drives not used by the array).
The key shares are distributed across all non-spare disks used in the RAID configuration. If your array has n non-spare disks, you must have (n+1)/2 of the key shares to unlock the data on the disks. If you are missing one or more of the key shares, you will not be able to recover the data.
You can back up the disk encryption key shares. Key shares are backed up in groups of three files. To unlock the array, you need to supply two backup shares.
Under normal operation, the keys are not necessary because the data is redundant; however; they might be useful in the event that a disk needs to be sent to a data recovery service. Use the Maintenance tab to back up the disk encryption key shares.
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