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raid question

Greetings;            (Posted to LINUX-390 and debian-s390 lists)

I came across an unsettling bit of info a while back.

I was told that if you lose one volume of a raid set you can replace
and the data will get rebuilt, but if you lose a second volume before
you get the first one rebuilt you will lose all the data -- irretrievably!

Is this true? Is there any reasonable way to get around it? Is there
a reasonable alternative to raid?

As always, Many TIA!
Dennis G. Wicks             Systems Programmer      dennisw@cdg.ws
Communications Data Group   Tel: (217)355-7117  Fax: (217)351-6994
102 S. Duncan Rd.
Champaign, IL  61822

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