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[azmanam]

See here for my backstory, if interested. Thank you to all who gave me feedback.

After synthesizing everyone's feedback, here's what I'm thinking of purchasing, budget pending:

*Synology DS423 or perhaps DS1522 (the decision may be easier, since the 1522 (diskless) is not currently available on Amazon)
*Seagate Ironwolf 12TB hard drives (either 4 or 5, depending)
*RAID 5
*Is an uninterruptible power supply like this one a want, need, or must-have?

Seem reasonable? Anything I'm overlooking or not thinking about?

 

[degrub]

ups must have

 

[sfx2000]

Looks like a good bill of materials...

DS423 is a pretty good NAS box, the Ironwolves are a good choice (just note that they are agressively noisy on seeks), and I would seriously recommend the UPS...

Just note - I would also consider the 923+ compared to the 423 - you have the ability to add a 10Gbe card at some point if needed.

RAID is not a back strategy - the more disks in a RAID site, it's a nLog function on failure rates... and it's a bit opposite of what one would expect - RAID1 is pretty safe, RAID10 is similar - RAID0 is scary RAID, and RAID5 follows closely behind...

So like the UPS, backups of that NAS are a critical path item.

 

[degrub]

and with random bit error rates of 1 in 10^15 bits, well, calculate the number of bits that can be stored on that capacity disk and then apply across an array.

 

[azmanam]

So maybe consider configuring my NAS as RAID10 then, and accept the difference in storage capacity.

Can you do RAID10 on a 5 bay?

If budget becomes an issue, could I start with 2 drives in RAID10, then add more later seamlessly?

 

[L&LD]

RAID10 needs an even number of drives (greater than 2).

You can't do RAID10 with only 2 drives.

You can do RAID10 on a 5-bay NAS (assuming it offers that option). But you'll have a spare bay available (for hot-swap, possibly).

 

[azmanam]

Of course you can't do RAID10 on 2 drives. That's a silly statement

So maybe start with 2 drives in RAID1, then when/if I get to 4, I could consider RAID10? Or once I decide RAID1 that's it?

 

[L&LD]

Yes, it is silly. One you made/implied originally.

I don't believe that you can migrate RAID1 to RAID10. Even if you could (depending on the manufacturer/firmware...) I wouldn't attempt to with important data on the router.

 

[azmanam]

Yes, I was roasting myself

Ok, good to know about migrating RAIDS.