Migrating Data from an Optical Storage Device
Due to inefficient file systems and the manner in which many older jukebox management applications randomly wrote data to media stored in optical libraries, extracting data out of an optical storage device can take many months to complete, even for the smallest migration job.
Simply mapping network drives to the optical library and target device, and issuing a "copy-and-paste" operation, or writing a command-line script that executes a series of xcopy commands to the library will cause a behavior within the library known as "thrashing" which occurs when media are constantly swapped in and out of drives to retrieve only a small number of files during each swap interval.
As the number of files and physical pieces of optical media increase, not only does thrashing have a significant impact on the time to complete a migration effort, but the constant swapping of media puts a severe strain on the library robotics, as well as the optical drives, thereby increasing the likelihood of a device failure at some point during the migration.
Migrating Data and Regulatory Compliance
In addition to reduced performance and device failure risks associated with the "copy from a mapped drive letter" method of migrating data, organizations may face legal risks when the data being migrated is subject to regulatory compliance, and/or is involved in legal discovery and litigation.
When dealing with regulatory compliance issues, simply moving data from a legacy storage device to a new storage device does not guarantee authenticity of the files, even if they were stored on WORM media and are being moved to WORM media.
ONEPASS Data Migration Software
ONEPASS Data Migration Software was specifically designed to aid with the extraction of data files from legacy storage devices in the most efficient manner, with the goal of maximizing performance, minimizing downtime due to device failure, and maintaining chain-of-custody for each and every file migrated to the new device.
To eliminate thrashing of optical library robotics, the intelligent, media-aware architecture of ONEPASS data migration software organizes file recalls such that an entire side of a media is read sequentially in one pass, hence the name ONEPASS, thereby optimizing performance and reducing the migration effort by a factor of 50 times or greater.
And to provide continuous access to data during a data migration job, ONEPASS allows the administrator to assign system resources between access and migration, ensuring that business and IT requirements can be continually met.
As part of a "data cleansing" process during a data migration job, ONEPASS provides the ability to selectively include or exclude files, folders, and sub-folders, and migrates only the required subset of data, thereby reducing migration times and required storage capacity on the new target device.
Regarding chain-of-custody to meet regulatory compliance, every step of the migration process is captured and logged, beginning with selecting the source data, and ending with post-migration verification of file content on the target system.
Using a 160-bit SHA1 cryptographic process, ONEPASS establishes a unique content ID for each file, and once the file is migrated, it is then recalled from the new storage device, and the content ID is recalculated and compared to the original content ID to ensure authenticity.
Upon conclusion of a data migration job, ONEPASS reports provide documentation detailing the chain-of-custody for each file, and reasons why a file was not migrated, such as filter exclusion rules, missing media, or corrupt data, thereby satisfying even the most demanding auditors with respect to the quality of the migrated data.
ONEPASS platforms include:
- ONEPASS Data Migration Software for EMC DiskXtender (formerly Legato and OTG)
- ONEPASS Data Migration Software for IBM 3995/3996 Optical Libraries (IBM OS/400)
- ONEPASS Data Migration Software for Sun/StorageTek ASM
- ONEPASS Data Migration Software for Plasmon Diamond
|
