What is the optimal solution for SAN disk configuration - RAID0 or RAID5? Where is the industry heading?
There is no optimal solution. It always depends on the application.
Best practice by all the database and mail/messaging vendors is to use RAID1 for transaction logs and RAID5 for the databases. RAID 1+0 would be best since you get the performance of striping with the availability of mirrors.
RAID0 is the fastest but does not use parity. That's why it's fast, no parity overhead. So, RAID0-based data is subject to disk failure causing data loss.
The solution with the best ratio of performance vs. cost is RAID5. That's why it's so prevalent out there.
I like RAID 1+0 if you can afford the disk space penalty associated with it. If not, then RAID5 makes a lot of sense since you get pretty good performance and,
Editor's note: Do you agree with this expert's response? If you have more to share, post it in one of our .bphAaR2qhqA^0@/searchstorage>discussion forums.
Dig deeper on SAN management
Related Q&A from Christopher Poelker
SAN expert Chris Poelker compares connecting a SAN with wavelength cabling and dark fiber and discusses the pros and cons of each.continue reading
SAN expert Chris Poelker discusses how to change the size of a LUN in a Microsoft cluster server environment.continue reading
Storage expert Chris Poelker outlines WWN basics in order to answer the question: "Why do HBAs in a SAN have same base?"continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.