Re: Recommended tape backup software - tape vs disk - raided
hi ya ron
> And I'll be bringing home my greater-than-terabyte-sized
> enterprise database (to poke around with it..) some time in
> the near future??? Not likely.
it fits in a itty bitty "2u" cases...
- 2 or more of um for redundancy/reliability
> Besides, I don't have a $3M Alpha w/ VMS & Rdb licenses
> in the back bedroom, either...
not yet :-)
but everybody has more than a compute power equivalent of an
old cray-1 in their homes now... :-)
> > > > A terabyte is 10 AIT-3 tapes. How many disks is it?
> > >
> > > 10 120 gig IDE drives.
> > >
> > > Each with lots of electronics to fail.
> >
> > yuppers... and with a tape drive.. you only fix one ??
>
> The likelihood that 1 of 10 mechanical devices will break
> in a given timespan is far more likely than the likelyhood
> of just one device breaking.
yup... but when one tape drive dies.. everything waits...
till one goes off and gets a new $7K tape drive...
( most people have 2 or 3 identical drives ?? i hope...
- when it died at the wrong time is when we switched
over the the disks-based backups .. since we got it
back online within hours... the tape drive took months
when one disk dies... throw it away and put in a new one...
> > and i've never dropped at tape drive... nor disks...
> > - tapes get dropped because a klutz like me is swapping
> > out a tape w/ feeble fingers...
>
> To quote you:
> > > > On Mon, 2002-05-20 at 06:22, Alvin Oga wrote:
> > > > > --- if the disks is raid5'd ... give one disk
> > > > > --- to each of the CEO/CFO/CTO/foo/bar and no one user
> > > > > --- has all the data... no way for stealing corp secrets
>
> By definition, you must pull those spindles in order to give
> them to the CEO/CFO/CTO/foo/bar. So, not only might _you_
> drop the disks, but the CEO/CFO/CTO/foo/bar may also drop them.
i wouldn't give "backups" to people ....
( when the backups contain user passwds and
( financial data or other sensitive stuff...
- raid5 provides a built feature that no one
user can have all the data.... if one backups only
one disk-dump per tape or disk...
- was meant for 2 tapes to offsite san francisco office
and 2 tapes to offsite boston office
and 1 tape to offsite UK office
c ya
alvin
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