What is the recommended number of mounting count for IBM LTO 7 tape.
Hi All,
What is the recommended, number of mounting count for IBM LTO 7 tape?
BR,
PrageethH
Mounting count really doesn't matter. What most important is the number of passing over the read/write head.
Default durability for LTO is 1 million pases. That doesn't mean the tape will last 1 million writes because the tape pases the R/W head multiple times during a full tape write. LTO has 3584 tracks and each band is 32 track. Meaning a full tape write is 112 pases.
So lets count a bit :
Shortest retention = 1 month
Life span (estimate) 4 yearsThen tape will be written 12*4 = 48 times * 112 passes = 5376 for a life span.
Then we have to count for shoe shining, start / stop operation etc - let's add 50% then the number of passes = 8064 passes. Plenty off room to the 1 million pases. Best case scenario off case.
Found this PFD who cover the topics well :
https://iscgroupllc.com/wp-content/uploads/2012/05/ISC-White-Paper-Lifespan-of-LTO-Tapes.pdf