New answers tagged raid10
You should take a look at the S.M.A.R.T values of the drives.
Every additional RAID you create would need to update its superblocks. It would drag performance down, not surprisingly. For RAID-10 there's no point with multiple RAIDs creation, use LVM-2 on top of it, that's all.
It seems RAID1 with 4 SSDs means RAID10 in LSI's world. Here is a reply from LSI: You would have to create your RAID 10 Cache Cade Volume in the BIOS and it will show as a RAID 1, but works as a RAID 10.
Did you try type=10? I believe that you can only use CacheCade SSDs in RAID 0 or RAID 1. I'm not sure why you'd need RAID 1+0, though. The upper limit to the caching size per controller is 512GB, no?
an actual hardware RAID controller should be capable to begin the write at the same time and report the write operation as complete when the slower disk has completed, which should be only marginally higher than in a RAID-0, if at all. Each write has half the total performance available, though. In your example, each disk of the RAID 0 only needs to ...
If RAID 1 was just hotwiring a cable the performance impact would be null (a factor of 1.0), but RAID 1 mirroring is more than just hotwiring a cable - actual work needs to be done to write data to two drives and handle the results of that write from each drive. That extra work is the factor they're talking about in the performance impact. Whether the I/O ...
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