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paulyboy233's picture
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Mix 'n Match Hard Drives?
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I have owned a Synology DS212j for a while, and have been happily filling it with all the usual stuff.

When i purchased the NAS, i added a 2tb Seagate Barracuda, which at the time was £120, and so with the wife not understanding the need for 'another expensive box', i only purchased one hard drive.

So now i realise the importance of having two drives, for back-up etc, because we all have such large collections these days and would be heartbroken to lose it all.

As there are better drives around now (greener, quieter, etc), can i add another 2tb drive, even though it may be a different brand, have a different spin speed, or cache size?

I'm not wanting to buy the exact same one as it is still hovering around the £100 mark, and there are bargains to be had for £60 -£70.

professorhat's picture
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RE: Mix 'n Match Hard Drives?

You absolutely can use different brands as long as they're the same size (although if you're using Synology's Hybrid RAID, even this isn't a necessity), though I would try and get the same spin speed / throughput (i.e. for SATA, 3 Gbps or 6Gbps) as the drive will only run as the slowest available i.e. if you have 10,000 RPM drive and your second drive is a 7,200 RPM drive, then your existing drive will slow down to that speed, whereas if you buy a faster drive than the one you want, likely you're spending more than you need to for no performance gains.

In fact, even if you're buying a NAS with all the drives fitted, if you're intending to use RAID for redundancy and have a choice, I believe it's a good idea to get different brands as this increases the chances of not getting drives that may fail at approximately the same time, giving you time to replace a drive before a second one fails and therefore not lose data!

 

The owls are not what they seem...

hammill's picture
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RE: Mix 'n Match Hard Drives?

professorhat wrote:

In fact, even if you're buying a NAS with all the drives fitted, if you're intending to use RAID for redundancy and have a choice, I believe it's a good idea to get different brands as this increases the chances of not getting drives that may fail at approximately the same time, giving you time to replace a drive before a second one fails and therefore not lose data!

 

Interesting idea.
paulyboy233's picture
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RE: Mix 'n Match Hard Drives?

Thanks professor, that's most informative, (and more importantly, the answer i was looking for)!

AnotherJoe's picture
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RE: Mix 'n Match Hard Drives?

Just get drives of the same capacity if you are going to raid/mirror.

 

The spindle and throughput speeds are irrelevant in consumer NAS, as the limiting factor is the network Interface, You wont get anywhere near the performance limit of the hard drive(s).

 

You might want to compare decibel levels and power consumption of the various HDs, but in a 2/4bay NAS I wouldnt worry about it.

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