OPENTEXT Tableau TX1 - Page 71

OpenText Tableau Forensic TX1 Imager
The Information Company 71
Duplication/ Image Type
Hash Type Options
Notes
E01
MD5 and SHA-1
E01 format does not
currently support SHA-256.
MD5 and SHA-1 forced on
together since E01 format
cannot support SHA-1
alone, and it was decided
to not allow MD5 alone to
simplify setting
configurations.
EX01
MD5 and/or SHA-1
EX01 format does not
currently support SHA-256.
Can select any
combination of MD5 and
SHA-1 (including none if
verification is not required)
since EX01 format can
handle all of them.
Error Granularity defines the granularity of failed reads from the source drive. The
default setting of Standard attempts to recover data down to a 32 kB resolution. The
Exhaustive setting attempts to recover data down to a single sector.
Note: The default error granularity setting is Standard, which will result in a minimum
chunk of 32kB of source data (64 sectors for a 512B sector drive) that will get
skipped and filled with zeros upon completion of the attempted reads (assuming no
reads were successful). If this condition is encountered, consider changing the error
granularity setting to be Exhaustive, which will result in repeated read attempts of
the error region with decreasing sector sizes. This will maximize the amount of
recoverable data and minimize the sectors that get skipped and filled with zeros.
Error retry defines the number of times TX1 will attempt to read sectors with errors
before skipping the sector (and using a fill value of zeros). Be careful when selecting
a value of 10 or 100 as it will drastically increase the duplication time when imaging
source drives with hard errors.
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