interesting idea. Wonder if our RAID controller can do a 3 way mirror? I'll have to check into that. Guess I could always add a second drive array for the third mirror later on (the drives are cheaper, not cheap enough yet - we are using SAS drives for the data drives, and SATA for the system drives - diffenent controllers).
> -----Original Message----- > From: [email protected] [mailto:u2-users- > [email protected]] On Behalf Of Dave Laansma > Sent: Wednesday, April 28, 2010 1:16 PM > To: U2 Users List > Subject: Re: [U2] Universe and stripped drives > > My opinion is to stripe all your data over as many drives as possible. > > Regarding mirroring, I would suggest a third mirror. > > The third mirror can be broken anytime during the day and used for > backup, then 're-sync'd.' > > This configuration provides for minimum data loss due to (the number > one > cause of data loss) disk failure. > > Drives are cheap. Mirror up! > > Sincerely, > David Laansma > IT Manager > Hubbard Supply Co. > Direct: 810-342-7143 > Office: 810-234-8681 > Fax: 810-234-6142 > www.hubbardsupply.com > "Delivering Products, Services and Innovative Solutions" > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of George > Gallen > Sent: Wednesday, April 28, 2010 12:47 PM > To: U2 Users List > Subject: [U2] Universe and stripped drives > > We are in the process of upgrading our system. > > When we setup our current system, it was suggested we strip our data > drives (5) into one, > instead of having 5 separate drives, so it could pull more data at > once. > > The new system will have 6 drives available for striping > > We were going to have 6 drives striped into one, which would be > partitioned into our data areas > the thought being it would be faster disk access if it's pulling from > all 6 drives at once. > BUT...all of the partitions are on that one striped drive. > > Would it be better to have (2) sets of 3 drives striped into one, and > setup the two most used > accounts on each of those drives, so now it's only pulling data from 3 > drives, but there could > be less competition between the two accounts, since they are pulling > from separate drives? > > Anyone played with this at all? > > FYI, each drive is mirrored as well, so if there is a drive failure, > data loss is protected, > if there was a drive failure on both the main and mirror (same drive) > then with the > 6 drive strip, we stand to potentially lose more data, than if there > were 2 sets of 3 striped. > But...since we have full daily backups, and potentially, considering a > second backup during > the day, the amount of data loss would be minimal....so I'm putting > that > off the table for > now in determining whether to go with a 3 or 6 stripe. > > > George Gallen > Senior Programmer/Analyst > Accounting/Data Division, EDI Administrator > [email protected] > ph:856.848.9005 Ext 220 > The Wyanoke Group > http://www.wyanokegroup.com > > > > _______________________________________________ > U2-Users mailing list > [email protected] > http://listserver.u2ug.org/mailman/listinfo/u2-users > _______________________________________________ > U2-Users mailing list > [email protected] > http://listserver.u2ug.org/mailman/listinfo/u2-users _______________________________________________ U2-Users mailing list [email protected] http://listserver.u2ug.org/mailman/listinfo/u2-users
