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Serpent-Twofish
All algorithms use a 256 bit key.
Note: a cascade encryption algorithm (e.g. AES-TwoFish-
Serpent) can be many times slower than a non-cascade one (e.g. AES).
Hash Algorithm
The hash algorithm used to generate the encryption keys. Supported options are:
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RIPEMD-160 (160 bit hash)
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SHA-512 (512 bit hash)
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Whirlpool (512 bit hash)
Use Weak Keys
Check this box to use a "less random" but faster random number generator when generating keys.
This may decrease the time needed to create an encrypted volume, but may weaken the security
of the volume.
Secure Erase
Check this box to initialize the volume with random data. This can strengthen the security of the
volume by making sure the amount of space used on the volume cannot be determined, but will
significantly slow down creation of an encrypted volume as random data will be written to each
block on the disk.
File System Settings
File System Type
The file system to used to format the drive. Options are 'EXT4', 'NTFS', and None. Formatting
EXT4 takes approximately .2 seconds per GB, a 1TB drive will take approximately 3.5 minutes
to format.
NTFS can be read natively if the drive is connected directly to a Windows system. (We
recommend using a Highly Reliable Systems eSATA or USB3 device that accepts your media.)
Selecting 'None' is useful when preparing a disk for use when sharing disks iSCSI and with
VMWare ESXi/vSphere.
Block Size (bytes)
The block or cluster size in bytes. The default for NTFS is 4K. The default for EXT4 is
automatically determined based on the drive size.
FRS Size (bytes)
NTFS only. The File Record Segment or FRS size in bytes. The FRS size determines the number
of extents allowed per file. To support large files (>500GB) it is recommended to use 4096. The
default is 4096.
Setting this to 4096 is same as using the '-UseLargeFRS' option with the Format-Volume cmdlet in
Windows PowerShell or the '/L' option with the format command from the Windows command
line.
