divBAB2015

The tape market has taken significant steps to separate itself from disk in recent years and this feature is a great addition to that wave of improvements. Spectra is the first vendor to offer a solid data integrity assurance solution, which proactively mitigates potential issues that would otherwise be below the visibility line for end users.

Fred Moore, President, Horison Inc.

How do you address the data integrity issues that require attention but occur after the data is written to tape media? After data has been written to tape, confirming the integrity of data stored onto tape media has only been possible through labor- and time-intensive manual testing of tape-tasks which are rarely given priority.

Spectra’s Suite of Features

To give you data integrity verification on tape, Spectra’s BlueScale management offers a sophisticated suite of features, included and free, that allow you to actively check data already written to tape. Each process is performed by the library independent of the host and the application that is used to read and write data to the tape.

PreScan ensures that tapes are usable and can accept data. PreScan checks each imported tape and verifies that the tape can be written to, scanning the tape for potential issues including broken or dislodged leader, poor media health and write-protected status.

QuickScan scans a tape uni-directionally by reading the length of one wrap (16 tracks on LTO and to 32 tracks depending on tape technology) of the tape to provide a rapid indicator of integrity of data written.

FullScan checks an entire tape to ensure that all sectors can be read. FullScan confirms that there are no media errors on the tape by reading the entire length of the tape up to the end of the recorded data.

After the PreScan, QuickScan and FullScan operations are complete, the library stores the information into the tape and the MLM database. Users can set triggers to check the data integrity of tapes at regular intervals of time or when desired to ensure that the data is valid. Users can also verify a specific tape’s data integrity on request. This process allows for rapid spot-checks of data integrity.

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