Re: EMC RAID-5

From: Rao_Yalamanchili@apsnet.com > >We are using currently HP-UX 11.0, V 7200 and 64 bit O/S. We are using IDS >7.31 FC2. >We have over 160 GB database. We have 4 physical CPUs and 3 CPUs assigned >to informix. > >We are planning to migrate the data to EMC CLARiiON System 1 and RAID-5. Well, don't come crying to us, afterwards. RAID 5 is a crock of brown, smelly stuff. >Could someone please let me know pros and cons about it. Pro: You could save a few bucks on disks. Con: It never verifies parity. It offers abysmal write performance. Actually, I'm not going to rehash it. Go to deja.com and search for articles on RAID5 by Art Kagel. He da man. >I have tables with more than 35 GB size. I fragmented these tables into 3 >fragments. > >I am new to this RAID-5 system. I think RAID-5 works in same concept of >informix fragmentation. WE are going to have disks with 18 GB size. We are >going to mirroring the disks. There will be 9 GB space available in each >disc. No, RAID 5 is nothing like Informix fragmentation. >How can I allocate the spaces. I confused here because of RAID-5. >Can I create a single space for that table and assign 5 discs with 23 >chunks, RAID-5 is going to create 5 threads to query. >Am I correct? >or Can I make it 5 fragments, I mean into 5 db spaces NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com