Raid setup recommendations
reddit / selfhosted

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apperrault · 2023-11-10 02:23

Hey all, just purchased a new NAS, Synology 8-bay, full of 6TB drives.
I don't want to debate the Synology OS vs something like TrueNAS or
similar OS. What RAID would you setup the drives with? Raid 5, Raid 6,
something different?  Looking for a nice balance between available
space, speed and recovery in the event of something fails.
I will be mostly be storing media (videos etc) family photos etc.
Anything critical will be replicated to a remote NAS and Google drive.

What do you recommend

Thanks

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stupv · 2023-11-10 03:14

Raid 5 and 6 are essentially the same, and have the same pros and
cons. Good read performance, bad write performance, and disk
redundancy (1 disk for Raid5, 2 for Raid 6). By the same token, for
both you will lose capacity equal to the number of parity disks -
total storage for Raid5 will be n-1TB and Raid6 n-2TB.

The other common one is a striped mirror, so called RAID10/RAID1+0,
gives you better read/write performance but you will lose half of your
storage capacity ([n/2]TB). The redundancy also is *potentially*
better but also potentially worse - an 8 drive RAID10 can conceivably
have 4 drives die without losing any data, as long as they are all in
the same side of the mirror. Equally, it can lose data after 2 drives
die so long as they are in opposite sides of the mirror

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selfhosted-ModTeam · 2023-11-10 05:52

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