LTFS (Linear Tape File System) is one of the most advantageous features of the LTO data tape format. With proper implementation, LTFS allows data to be accessed conveniently, similar to the accessibility of data on a disk or removable flash drive. 

However, LTFS does not change the sequential nature of tape write processes. In other words, if you write a file to an LTFS tape set, the data will be written to the end of the tape — and if you delete files, the change does not occur immediately. The deleted files will continue to take up space on the media until you format the tape(s). 

If you need to recover data from an LTFS tape set, there are several key factors to keep in mind:

• If tapes are physically damaged, the LTFS file system will not meaningfully impact the chances of a successful recovery. 
• However, engineers should have experience with LTFS, as this can be beneficial when reconstructing and validating the recovered data.
• If files have been deleted from an LTFS volume, deletion will only occur when the tape media is completely reformatted. 

Below, we’ll explain a bit more about LTFS and how it impacts data recovery. To speak with an LTFS data recovery engineer, call (800) 460-7599 or fill out our online form for a free consultation.

Before Using Automatic Repair for LTFS, Exercise Caution

LTFS file system issues can occur due to power loss, drive disconnection, or for other reasons, resulting in a failure to recognize the volume. 

LTFS tapes contain two partitions:

• Partition 0 contains an index file, which categorizes the files that have been saved to the tape. 
• Partition 1 includes files (data), along with additional indexes.

If an LTO drive is not properly disconnected, the indexes of the two partitions may not match. This can be resolved in some cases by turning off write protection and engaging automatic repair utilities. 

However, we strongly recommend working with a tape services provider when addressing any issues, particularly on volumes that contain non-redundant copies of important data. Repairing the indexes can cause permanent data loss if the failure (or disconnection) occurs in the middle of a write operation — but in some cases, data recovery engineers may be able to restore the affected files. 

Trust the Leader in Data Tape Recovery

Total Data Migration (TDM) is a recognized industry leader in data recovery, restoration, migration, disposal, and tape backup technologies. With more than 50 years of combined experience, our leadership understands the challenges of enterprise storage, data retention requirements, and compliance considerations.

We provide recovery, migration, and secure sanitization services for all LTO formats, ensuring that enterprises can restore key systems when necessary — and retire legacy systems where appropriate. 

Get started with a free consultation. Fill out our online form or call (800) 460-7599 to speak with an expert.