10 Aug
1999
10 Aug
'99
7:39 p.m.
On Tue, 10 Aug 1999, Alexander Strauss wrote:
In a larger environment you probably don't want to backup each fileserver separately with an attached DLT. And as NetApp doesn't support a reasonable NDMP version which allows backup over the net the only way to do a central backup is through NFS - not a very smart solution.
What do you consider a larger environemnt? How many terabytes of data do you have?
I think RAID4/RAID5 is cannot be as performant as RAID1 (Mirror), because the parity bits need to be recalculated for every bit written.
Addition is cheap, so that is not an issue. What may be an issue is retrieving parity data from the array, but that can easily be cached. There are two writes in RAID 4/5 just as there are in RAID 1.
Tom