I tried to google about this question but I didnt find an answer, the point is : I have a MSL4048 HP library of LTO4 tapes, and as long as LTO tape drives have buit-in mechanism for error detection and correction do we need to use the "check backup for data integrity" option when creating a protection group? What is the real meaning of this option ?
I read on another thread that "Verify calculates the checksum of the data written on tape and compares it with checksum which is also written on the tape." But this applies to LTO :
"LTO Error detection and correction
The tape drives use a strong error correction algorithm that makes data recovery possible when lost data is within one track. Also, when data is written to the tape it is verified by reading it back using the read heads that are positioned just 'behind' the write heads. This allows the drive to write a second copy of any data that fails the verify without the help of the host system."
So, do we really need to enable verify ?
As a matter of fact I use this option on my protection groups that use tapes but now Im considering remove this option because it adds long delays on tape backups - as long as it is not really necessary.
Thanks for any help