CCL: Cloud backup in computational chemistry

 Sent to CCL by: Susi Lehtola [susi.lehtola..alumni.helsinki.fi]
 On 3/1/22 15:35, Detlev Conrad Mielczarek detlevcm#,#googlemail.com wrote:
 >
 > Sent to CCL by: Detlev Conrad Mielczarek [detlevcm]![googlemail.com]
 > Please note, RAID is NOT a backup.
 >
 > The topic is fairly complex if done rigorously. Look up "bit rot"
 - data life is finite too.
 > Look up the risk of data corruption on a RAID system - or loss with say
 malware or error.
 >
 > The topic is not simple - unfortunately.
 > And then there is data lifetime on disks which is not necessarily a
 resolved question.
 > Tape is considered the best for long term storage at current - maybe
 archive quality DVDs.
 Yes, at the bare minimum you would want 2 NAS systems each running RAID
 1, preferably with disk drives from different manufacturers. That way if
 there's a manufacturing error in a hard drive, it won't affect the whole
 array at once. But, an electrical failure or a fire would still wipe out
 the whole system. That's why you want backups in another physical location.
 I heard from an old Linux developer colleague that he had bunched up
 with a friend and set up a pair of home servers with 4 hard drives on
 RAID 5 each. They had encrypted partitions on each others' servers,
 which would be automatically be kept in sync: your home directory would
 also be encrypted onto your friend's server. You can't access their
 data, and they can't access your data, but you both enjoy the
 significant benefit of having your data automatically backed up
 elsewhere, and only have to put up the cost of setting up the servers if
 you can host a server in your home.
 --
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 Mr. Susi Lehtola, PhD             Adjunct Professor
 susi.lehtola|*|alumni.helsinki.fi   University of Helsinki
 http://susilehtola.github.io/     Finland
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 Susi Lehtola, FT                  dosentti
 susi.lehtola|*|alumni.helsinki.fi   Helsingin yliopisto
 http://susilehtola.github.io/
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