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The answer is probably moot, because unless you have a UEFI BIOS then the largest device you will be able to boot is 2TB. &nbsp; <br />
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So what you want to do is create a 2 x 1 TB drive pair as a RAID1 for the O/S. &nbsp; Then take the 4 remaining drives and make it a RAID10. &nbsp; If you have 2 more slots then many RAID controllers will allow you to resilver the 4-disk RAID10 into a 6-disk RAID10, but you need the bays.<br />
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Exactly what controller do you have, what is your O/S, and please check the manual for your computer and see if it can boot a disk &gt;&nbsp;2TB before you even worry about building a 6-drive RAID5.
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The bay that these disks are in actually has 8 slots. Two are RAID1 for the OS already. I am not touching that. So the remaining 6 were what was in question. While I lose 1TB of storage going with RAID10 I think I am better off with the performance. Thanks for the quick refresher course.
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I just want to be sure I understand the difference between RAID 5 and RAID 10. I have a server where my main concern is to increase storage. I have 6 drive slots available to me. I am going to replace the current drives with 6 1TB disks. If I use RAID 5 I will have a logical 4TB disk with 1 hotswap and 1 parity disk. If I use RAID 10 the most I would get out of these drives is 2TB (3 mirrored drives). I know RAID 10 allows for better performance but is there any way to increase that capacity?
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I just want to be sure I understand the difference between RAID 5 and RAID 10. I have a server where my main concern is to increase storage. I have 6 drive slots available to me. I am going to replace the current drives with 6 1TB disks. If I use RAID 5 I will have a logical 4TB disk with 1 hotswap and 1 parity disk. If I use RAID 10 the most I would get out of these drives is 2TB (3 mirrored drives). I know RAID 10 allows for better performance but is there any way to increase that capacity?

RAID 5 vs RAID 10

Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.

Storage Hardware

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.