282 T10000: Interface Reference Manual August 2016
Parameter Value
Data Block Offset When enabled by the option flags below, this offset indicates the exact
position in a data block where the search should find the specified
search data. If the search data is not found at the exact specified offset,
then the search proceeds to the next data block (if one) and examines
that block at the exact specified offset (and so on until an EOD or a
filemark is encountered per the option flags below). This type of search
is useful for finding unique customer metadata on the currently
mounted media. The data block offset + the search data length should
not be greater than the maximum block length - 1 as data block
spanning is not supported on the T10KC.
Offset values can range from 0 to the maximum block length - 1.
Maximum block length is 2,097,152 bytes (0x200000) in standard mode.
Maximum block length is 2,097,156 bytes (0x200004) in DIV mode.
Option Flags Search options - Stop On Filemark (SOFM ) and Data Block Offset
Enable (DBOE)
00 = A search for the specified search data is initiated at the current
device location. The search is stopped when the search data is found or
EOD is encountered
01 = The drive will determine if the specified search data exists at the
exact specified offset in a data block starting at the current device
location. If it does not, then the search proceeds to the next data block.
The search is stopped when the search data is found at the exact
specified offset or an EOD is encountered.
10 = The same as option 00, but will also stop if a filemark is
encountered.
11 = The same as option 01, but will also stop if a filemark is
encountered.
Search Data Length: The search data length specifies the size of the search data. The data
block offset + the search data length should not be greater than the size
of a data block as data block spanning is not supported on the T10KC.
Values ranges from 1 to 1024 bytes.
Search Completion: If a match is found:
The drive is positioned BEFORE the data block that contains the match.
If a match is not found:
For option flags 00 & 01: The drive is positioned at EOD.
For option flags 10 & 11: The drive is positioned AFTER a filemark if
one is found, otherwise EOD.
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