Ibm m1015 raid10 help

[alex1002]

I have 8 256ssds and when I try Create array I only see option for raid1/0. I also tried
Making two different vd and still won't allow raid10.

 

[wildchild]

M1015 only supports 1 or 0. Use software raid, or even better dont do raid with a m1015.
Use it as a hba, do do software raid , especially when doing storage spaces or zfs

 

[Chuckleb]

According to all the spec sheets, it will do raid 10. I had the same thought.

Perhaps you have to build it by striping your mirrors?

 

[wildchild]

Regardless if it can indeed... Why would one want to, m1015 doent have cache...thus will not perform in a raid setup

 

[Chuckleb]

Having a cache doesn't necessarily impact the usefulness of the RAID card. A RAID-0 is a simple stripe, write-through is fine for it. This is analogous to the JBOD mode. A RAID-1 mirror provides protection and a write-through is fine as well. I use M1015's on servers to provide for a hardware RAID-1 instead of fakeraid from the controllers. So, a RAID-10 also doesn't necessarily need cache to be useful, it can stripe and mirror w/o and still be fast yet protect.

Heck, even RAID-5 and on will run fine on a card w/o cache, doesn't mean that you can't, just means that you probably shouldn't use writeback cache with the potential to lose data in that hasn't been written to disk yet. For simple tasks like this, and making sure to write through, this card is perfectly fine and has many many uses. Just don't expect much from it for the <$100 which the OP isn't. Regardless, doesn't answer the original problem of how.

 

[Chuckleb]

@alex1002

I went and grabbed an m1015 and 4 SSDs. I used the stock M1015 firmware, not updated to an LSI. Hope this helps.

Here are the instructions.

4 unassigned drives

Created a new array

Made a manual config

Grabbed 2 drives and made a drive group out of them.

Added a pair of spans

And you will now have an option for RAID10.

 

[alex1002]

Wow so nice of you. I will try again today. I already installed another card dell perc h310.

 

[Chuckleb]

Not a problem, it took a bit longer while I found spare cards to test on. I think it should work though!