1 Jun
2019
1 Jun
'19
8:54 a.m.
On 2019-06-01 07:44+0000, Hugo Mills wrote:
It depends on the quality of the media. I've
seen some that didn't
last more than the time it took to put the new-burned disk into its
case. (Seriously -- they were practically see-through). I've gone 5-8
years on mine without obvious data corruption. I believe it's possible
to get media which are intended for long-term storage, and they're
reputed to go up to 100 years, but those are going to be spendy.
This is not something you want to find out about when you need to go to
your backup for something. Sadly my college work is now only available
on neurons.
With a drive of generation N <= 7, you can use
tapes of no earlier
than generation N-2 for reading, and N-1 for writing. For N=8 (the
latest), you can only use tapes no earlier than gen N-1, for reading
or writing.
This makes me sad. You need to keep a drive and working interface
around. Then again, if you're doing that then it isn't unreasonable to
refresh by SHA validating stream to new media, then don't throw the old
copy away.
--
Best regards,
Ed http://www.s5h.net/