Where is RAID 5 or RAID 10
Hello. I recently set up an IBM X3650 M3 (7945). I installed MegaRaid Storage Manager. I am trying to create either a RAID 5 or RAID 10 array, however I am only given the options of RAID 1, RAID 0, or RAID 1E.
RAID 1E looks like the closest option to what I'm looking for, but where are RAID 5 or RAID 10. Could this be a limitation of my RAID controller? SAS Controller - SR BR 10i?
RAID 1E looks like the closest option to what I'm looking for, but where are RAID 5 or RAID 10. Could this be a limitation of my RAID controller? SAS Controller - SR BR 10i?
Joseph Daly
How many disks do you have in the server? If you only have 2 them raid 0 and 1 will be all you can configure. RAID 5 you need minimum of 3 disks and RAID10 you need minimum of 4 disks.
Integrated with 3 Gbps or 6 Gbps RAID controller (model dependent)
Enhances system availability and data protection without using a PCI slot
Choice of one of the following RAID adapters (model dependent):
3 Gbps RAID-0, -1, -1E or
6 Gbps RAID-0, -1, -10 (additional option RAID-5, -50 with Self-Encrypting Disk (SED) function or
6 Gbps RAID-0, -1, -10, -5, -50 with 256 MB or 512 MB cache (additional option -6, -60 with SED function and additional optional battery backup)
Enhances system availability and data protection without using a PCI slot
Choice of one of the following RAID adapters (model dependent):
3 Gbps RAID-0, -1, -1E or
6 Gbps RAID-0, -1, -10 (additional option RAID-5, -50 with Self-Encrypting Disk (SED) function or
6 Gbps RAID-0, -1, -10, -5, -50 with 256 MB or 512 MB cache (additional option -6, -60 with SED function and additional optional battery backup)
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xxdcmast, I have 2 disks set up as a raid1 with the OS installed, then i have six other disks, that i am creating a separate volume on. So i have six available disks.
m3rc74, i guess i have a 3gbps rai 0 1 1e because those are my only choices.
m3rc74, i guess i have a 3gbps rai 0 1 1e because those are my only choices.
One of the biggest mistakes people do is equate "performance" to throughput. Performance has two metrics which you must optimize for, throughput AND I/Os per second. If you are video streaming, you want RAID10 or even RAID5 / 50. But if you are doing database, you want IOPs. As such, you could easily see 5X better performance going with 3 x RAID1s instead of a single RAID10 if you are doing sql server as example.
So it comes down to how you use your data, on what is "best".
So it comes down to how you use your data, on what is "best".
RAID 1E with an even number of disks is RAID 10.
correct. raid 1e is a non-standard raid which is very similar to raid 5.
probably worth assessing what the raid is for to check you are using the right raid.
raid 1 is fast and very reslilient, but wastes disk space.
raid 5 is very resilient and better suited to hot swap environments where you want to be able to swap disks as they fail without a problem. You dont lose as much data space but its not as fast as raid 1.
probably worth assessing what the raid is for to check you are using the right raid.
raid 1 is fast and very reslilient, but wastes disk space.
raid 5 is very resilient and better suited to hot swap environments where you want to be able to swap disks as they fail without a problem. You dont lose as much data space but its not as fast as raid 1.
RAID 1e is nothing like RAID 5, it's like RAID 10 but suports an odd number of disks as well as an even number; you lose half the disk space to parity but can survive multiple disk failures so long as adjacent disks don't fail.