Posted: 5/17/2011 5:07:10 PM EDT
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Just got an LSI 9260 megaRAID card installed. I have 4x1tb drives on it. The setup on the LSI card is relatively technical in regards to my knowledge and I have a couple of questions, If someone has time to give me a brief explanation i would appreciate it. I would like to set it up as RAID 10 like I ran on the ICH10R onboard controller. Intel storage matrix is made for dummies like me and was very easy to set up, this is not. So I'm in the webbios setup menu. I have created two drive groups, with two drives on each. Now I have added these two drive groups on the same span. I believe this is correct to get RAID 10 right? Also, what is the best strip size for such an array? I can go as big a 1mb, and maybe even higher. The volume will be used for media storage almost exclusively, My OS is on an SSD. Any help or quick advice would be appreciated. Also Read policy option?(normal adaptive or ahead), Write Policy(write through, always write back, write back with BBU)? IO Policy(direct or cached) Drive cache(Nochange enable or disable) Disable BGI(yes or No) |
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Quoted: Why raid 10? Why not raid 5? RAID 5 pissed me off when I had a drive go down because it took so long to rebuild, with this card having its own processor and 512 mb memory i know it will be faster, but not sure how much. On the ICH10r it took 3 days to rebuild  .It gave me a optimal setup option which would automatically do RAID 6, which i understand has more parity but even more time to rebuild. |
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Quoted:
Why raid 10? Why not raid 5? For Media storage, I would be going with RAID5 (or 6, depending on the drive count.) RAID 10 has a lot of overhead for just media. As to rebuild time you should be able to prioritize the rebuild. It should not take 3 days. Fuck, I can rebuild 2tb drives running in software RAID5 in several hours. |
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Quoted: Quoted: Why raid 10? Why not raid 5? For Media storage, I would be going with RAID5 (or 6, depending on the drive count.) RAID 10 has a lot of overhead for just media. As to rebuild time you should be able to prioritize the rebuild. It should not take 3 days. Fuck, I can rebuild 2tb drives running in software RAID5 in several hours. That was with 4 1tb drives, and running the onboard controller while in Windows, but it no shit took 3 days. It did this twice and I got tired of it. I'm sure with this actual hardware controller it will be worlds better, but i'm not sure how much. Looking at all these options it is giving me it is way over my head. |
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Quoted:
Quoted:
Quoted:
Why raid 10? Why not raid 5? For Media storage, I would be going with RAID5 (or 6, depending on the drive count.) RAID 10 has a lot of overhead for just media. As to rebuild time you should be able to prioritize the rebuild. It should not take 3 days. Fuck, I can rebuild 2tb drives running in software RAID5 in several hours. That was with 4 1tb drives, and running the onboard controller while in Windows, but it no shit took 3 days. It did this twice and I got tired of it. I'm sure with this actual hardware controller it will be worlds better, but i'm not sure how much. Looking at all these options it is giving me it is way over my head. The rebuild of a raid 5 array with a hardware raid card will take hours, not days. At least in the business world I'm pleased with RAID 5 with a hot spare for data use. |
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Quoted:
I have created two drive groups, with two drives on each. Now I have added these two drive groups on the same span. I believe this is correct to get RAID 10 right? If the first two drive groups are RAID 1 and the second group of groups RAID 0 then you are doing correctly. I can go as big a 1mb, and maybe even higher. The volume will be used for media storage almost exclusive
What sort of media? 1k text files? 10k Word Docs? 100k images? 100M videos? What? If you're doing video files (which you didn't say. It would help us help you if you wouldn't be so difficult) files I'd go large stripe size of 64kB or larger. Also Read policy option?(normal adaptive or ahead), Write Policy(write through, always write back, write back with BBU)? IO Policy(direct or cached) Drive cache(Nochange enable or disable) Disable BGI(yes or No)
Read ahead enabled, write back with battery back-up, cached, enable cache, and background initialization enabled. |
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Quoted: Quoted: I have created two drive groups, with two drives on each. Now I have added these two drive groups on the same span. I believe this is correct to get RAID 10 right? If the first two drive groups are RAID 1 and the second group of groups RAID 0 then you are doing correctly. I can go as big a 1mb, and maybe even higher. The volume will be used for media storage almost exclusive What sort of media? 1k text files? 10k Word Docs? 100k images? 100M videos? What? If you're doing video files (which you didn't say. It would help us help you if you wouldn't be so difficult) files I'd go large stripe size of 64kB or larger. Also Read policy option?(normal adaptive or ahead), Write Policy(write through, always write back, write back with BBU)? IO Policy(direct or cached) Drive cache(Nochange enable or disable) Disable BGI(yes or No) Read ahead enabled, write back with battery back-up, cached, enable cache, and background initialization enabled.  sorry for being difficult.As for the media it will be about half music which usually run around 10mb file size, and half video files usually 250mb +, most being around 800mb. I have no battery. |