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01-13-2014, 03:03 AM #1Junior Guru
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6X 1TB 7200 - What is better to do with this? Raid XX ?
Hi there. It's my first experience with 6x disks. I have used 4x, 8x, 16x but 6x never used!
I'm always work with Raid-10, but with 6x Raid 10 is not possible.
The server don't have hardware raid card, I'll need to use software raid!
I have an option to get 8x, but I wants to use this other 2 spaces for 1x 1TB (Local backups) and 1x 512 SSD.
Someone have an experience with 6x disks software raid?
Thanks for help!
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01-13-2014, 08:58 AM #2Web Hosting Master
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You certainly can do RAID-10 with six drives. The only requirement for RAID-10 is having an even number of drives that is equal or greater than four. That would be my recommendation as well.
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01-13-2014, 09:45 AM #3Web Hosting Guru
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It depends what your goal is. Performance + Reliability then Raid-10. If the goal is just more storage then Raid-5 or Raid-6.
Also, software raid on linux works just fine.
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01-13-2014, 09:50 AM #4Web Hosting Master
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Keep in mind that RAID-5 and RAID-6 carry a much higher CPU overhead than RAID-10, so while you can get more storage with RAID-5, the performance will be considerably lower not only because of the RAID-5 design, but also because the CPU will be more heavily tasked.
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01-13-2014, 09:55 AM #5Junior Guru
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Yaaaa... lol... I think that with 6 drives we can't use for raid10.
Raid 10 is always the best. And as I see, without hw raid, using software raid. It's not bad. Good speed with sw raid 10.
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01-13-2014, 10:08 AM #6
No, you can use 6 drives in Raid-10. Its very common and many do it to give additional space requirements or IO benefits from the additional drives and higher stripe level.
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01-13-2014, 10:22 AM #7Junior Guru
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Think after 4, only 8 will be accepted. =)
Anyway thank you!
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01-13-2014, 11:03 AM #8Web Hosting Master
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RAID 10 is a series of two or more striped RAID-1 arrays (pairs).
Each drive (letters) is mirrored, for example:
Drive A1 and Drive A2 are a RAID-1 pair, let's call it Array A. Drive A1 and A2 are identical images of each other.
Drive B1 and Drive B2 are a second RAID-1 pair, calling it Array B. Drive B1 and B2 are identical to each other as well.
You then create a RAID-0 of RAID A and RAID B, making it a RAID-1 + RAID-0: 1+0 = 10.
You can have additional sets of RAID-1 arrays or pairs, and create a RAID-10 with however many pairs. They just need to be an even number. Many of our servers hold exactly six drives, and most of them are setup as a RAID-10 so it is definitely doable.
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01-13-2014, 11:29 AM #9Web Hosting Guru
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op is using the word "think" and meaning "thought". thats why you all are confused.
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01-13-2014, 11:42 AM #10Web Hosting Master
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Good catch.
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01-13-2014, 12:01 PM #11Web Hosting Guru
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If you don't have a RAID card, I would consider going with ZFS. If your OS supports it, it's a really cool and robust filesystem with redundancy.
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01-13-2014, 02:18 PM #12Web Hosting Guru
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01-13-2014, 06:56 PM #13Junior Guru
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01-19-2014, 04:27 AM #14Web Hosting Master
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You can definitely use 6 Hard drives with RAID10. Have you tried it yet?
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01-19-2014, 05:27 AM #15Snoork Hosting
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You can absolutely use 6 disks for RAID 10.
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01-19-2014, 06:08 AM #16Web Hosting Master
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RAID10 only needs to have an even number of drives when the RAID1's it's built on top of are comprised of 2 drives. Keep in mind RAID1 does not have to be 2 drives exactly, you can have 3, 4, 5, or any number in a RAID1 so long as it's 2 or more. So you can very well have a 9x drive RAID10 if it consists of striping across 3x RAID1's with 3x drives each. Generally, you won't find anyone using more than 2 drives in a RAID1, but there are situations where it could make sense to do so. For instance, with 4x drives and software RAID, you could have a RAID1 cross all 4x drives for /boot as you cannot boot from RAID10.
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