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In this case "The latest TS1170 drive supports 50TB JF media cartridges with 150TB compressed capacity through 3:1 compression" So looks like 50TB raw if I am

In this case "The latest TS1170 drive supports 50TB JF media cartridges with 150TB compressed capacity through 3:1 compression" So looks like 50TB raw if I am reading this right. For these sorts of solutions you are usually not using just 1 tape. The tape is the cheap part. The drives cost a decent amount though. So in your case if the data does not fit. You buy another tape and pop it into the existing drive and finish the backup. Also you would have some sort of rotation schedule and at least a few dozen tapes. If you are doing it right offsite and onsite rotation too. An extra tape in the mix of that is not something they would worry about. When I did this for a small org I had the weekends to do a full backup of all of our computers. Then during the week I would do incrementals. At the end of the week I would ship off the prev week to an offsite and start the next full backup. Not perfect but gave us a onsite 1 day return offsite (building gone) 1 week out. The offsite would keep about 6 months of tapes and return them about once a month.

klodolph 3y ago
Yeah. For most operations, you pay for drive throughput & redundancy, and the actual storage itself is “too cheap to meter”. Except when it isn’t, but those customers know who they are.
- dylan604 3y ago
  These are the same customers that only make 1 tape of the data. One facility I was at required 3 copies written by 3 different writers. These were in large robot operated units, so it was all automated by our front end. One copy stayed locally, the other 2 went to 2 different offsite locations in different parts of the country with the closest being in another town across state. Each tape had to be removed from the writer and placed into a different drive to do a read back for comparison. In the LTO4 days, we would catch lots of write errors like this. I wonder if the newer formats are any better about these errors? How I miss the old days of tar/mt commands, er, no, who am I kidding!
pstuart 3y ago
In the previous century we'd restore the production tape backups to a "production playground" that verified the backup actually worked as well as give a production-like testing environment.

klodolph 3y ago

Yeah. For most operations, you pay for drive throughput & redundancy, and the actual storage itself is “too cheap to meter”. Except when it isn’t, but those customers know who they are.

dylan604 3y ago
These are the same customers that only make 1 tape of the data. One facility I was at required 3 copies written by 3 different writers. These were in large robot operated units, so it was all automated by our front end. One copy stayed locally, the other 2 went to 2 different offsite locations in different parts of the country with the closest being in another town across state. Each tape had to be removed from the writer and placed into a different drive to do a read back for comparison. In the LTO4 days, we would catch lots of write errors like this. I wonder if the newer formats are any better about these errors? How I miss the old days of tar/mt commands, er, no, who am I kidding!

pstuart 3y ago

In the previous century we'd restore the production tape backups to a "production playground" that verified the backup actually worked as well as give a production-like testing environment.