4 ms·
I have also only ever had problems with RAID 5. Many years ago, we ran a hardware RAID 5 and it was really very slow. I eventually bought some extra drives an
by jugg1es 6y ago
I have also only ever had problems with RAID 5. Many years ago, we ran a hardware RAID 5 and it was really very slow. I eventually bought some extra drives and switched to RAID 0+1 with much greater results and comparable availability.
- 6nf 6y agoRAID 0+1, is that the same thing as RAID 10?
- greenknight 6y agoNope... RAID 10 or RAID 1+0 is 2 or more RAID 1's that are RAID 0'd together RAID 01 is 2 or more RAID 0's that are RAID 1'd together
- jugg1es 6y agoyea I had a mirror of striped drives. Gave you max throughput with some protection against failure.
- user5994461 6y agoThis article explains the difference in more details https://muetsch.io/why-raid-10-is-better-than-raid-01.html https://muetsch.io/why-raid-10-is-better-than-raid-01.html RAID 10 works by stacking pairs of disks, as many pairs as you want, each pair is redundant by nature. It's common to do with 8 or 12 disks, filling the whole front bay of the server. It can survive many drives failing as long as it's not two drives from the same pair. RAID 01 splits data differently. It's much more likely to lose the whole array if you lose any 2 disks, or god forbids, 3 disks. RAID 10 is the proper level. RAID 01 is dead and almost nothing supports it, it's most likely a mistake or a typo if you heard about it used in production.
- jugg1es 6y agoOur primary concern was absolute maximum performance on huge numbers of tiny files (terabytes of video cut into single-frame TIFFs) for video processing while also having at least some protection against a single failed drive. We were on a shoestring budget, so we couldn't upgrade our network to use fiber, so a SAN wasn't really feasible at the speeds we needed (SSD's also didn't exist yet). You could be right, but I know that I chose the one with the fastest possible performance and made sure there was an audible alarm if a disk failed.
- bc4m 6y agoIf you can afford to purchase 2x the disks for RAID10 you will certainly get better performance and availability. RAID5 is an approach that gives you lower cost in return for slower writes and less fault tolerance. Everything is a trade-off.
- jugg1es 6y agodefinitely true - but it's really hard to gauge what performance will actually be until you have the whole thing setup even with benchmarks.