Why not run host-based RAID5 (if your mobo has an ICH9R)?
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by host based...what do you mean. Well first off the mobo I will have in my file server will only be a G31 with an ICHR7 which doesnt support RAID. I was under the impression there was hardware RAID from a raid controller which is expensive, fakeraid like I use RAID 0 on my gaming desktop, and then software RAID where the CPU processes everything (similar to fakeraid) except it's faster and more stable.
Am I wrong?
Originally Posted by DuckieHo Why not run host-based RAID5 (if your mobo has an ICH9R)? |
Am I wrong?
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There are three types of RAID controllers:
1) Software RAID: an application creates the array within an OS
2) Host-based RAID cards: a hardware controller that utilize your system's resource like CPU cycles (i.e. onboard RAID, cheap RAID cards)
3) Discrete RAID cards: a hardware controller with its own processor and memory (i.e. high-end RAID cards)
Originally Posted by Sora1421 by host based...what do you mean. Well first off the mobo I will have in my file server will only be a G31 with an ICHR7 which doesnt support RAID. I was under the impression there was hardware RAID from a raid controller which is expensive, fakeraid like I use RAID 0 on my gaming desktop, and then software RAID where the CPU processes everything (similar to fakeraid) except it's faster and more stable. Am I wrong? |
1) Software RAID: an application creates the array within an OS
2) Host-based RAID cards: a hardware controller that utilize your system's resource like CPU cycles (i.e. onboard RAID, cheap RAID cards)
3) Discrete RAID cards: a hardware controller with its own processor and memory (i.e. high-end RAID cards)
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In theory they're about the same. In practice, Linux software RAID (md driver) almost always outperforms motherboard fakeraid.
As for setting it up, pop your Fedora DVD in, and click the RAID button on the partitioning screen.
Originally Posted by Sora1421 Then you are saying host-based is faster/better than software? |
As for setting it up, pop your Fedora DVD in, and click the RAID button on the partitioning screen.
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In theory, host-based RAID should be faster since there are less layers and more direct access to resources. However, RAID performance in Linux can be quirky. I believe you found that even discrete RAID controllers do not perform as well.
Originally Posted by error10 In theory they're about the same. In practice, Linux software RAID (md driver) almost always outperforms motherboard fakeraid. As for setting it up, pop your Fedora DVD in, and click the RAID button on the partitioning screen. |
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I don't get as high of a performance as I could with my PERC 5/i and 15000 RPM SAS drives as I otherwise would, since my full disk encryption is the bottleneck. But I'm not giving that up. I'll just overclock some more.
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Originally Posted by DuckieHo In theory, host-based RAID should be faster since there are less layers and more direct access to resources. However, RAID performance in Linux can be quirky. I believe you found that even discrete RAID controllers do not perform as well. |
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