Aix does all of this quite seamlessly. You can even configure file systems to use the inner, middle or outer parts of the drives.
Mirroring has saved our butts several times, even within the past couple months. It is very comforting when you're reading your Monday morning email and discover a failed drive over the weekend, you look around the office and everybody is working as though nothing were wrong. Hardware comes in, swaps the (hot-swappable) drive, re-sync the mirror and you're back up in just a few hours, literally, and nobody ever stopped working. Redundant power supplies (perhaps second most common cause of system failures) have also proven to be very helpful. Again, IBM has really done their homework on these e-class servers. 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 1:28 PM To: U2 Users List Subject: Re: [U2] Universe and stripped drives 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 _______________________________________________ U2-Users mailing list [email protected] http://listserver.u2ug.org/mailman/listinfo/u2-users
