RAID 1 Hot Spare

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kerol1990

Commendable
Jul 26, 2016
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Hi everyone.

Can someone explain to me about RAID hot spare. What does it do? Does this kind of architecture means we can change the Hard Disk while the Windows still running?

Thank you.

Best Regards,
Khairul
 
Solution
Hawkeye22
If your motherboard or current RAID contoller doesn't support RAID 1 with a hot spare, then you are out of luck. You will need to purchase a contoller with that option if that is really what you want. RAID 1 isn't as cost effective as some other RAID types either.

That said, I see no need for RAID in a home setup. A good backup strategy would help you more in that case. Also, just so you understand, a RAID can lose 1 drive in an array(degraded state) and still function normally. Once the bad drive is replaced, the array will be rebuilt on the fly and will no longer be in a degraded state. A hot spare simply takes the place of the bad drive instead of waiting for it to be replaced and the bad drive will need replaced anyhow. In this...
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Hi.
A hot spare in a RAID array allows a disk to fail without the integrity of the array failing. It allows the array to fail over to the spare drive, rebuild itself and continue to operate without any downtime until the failed disk can be replaced.
This feature is only available in RAID 5 and 6 though, not RAID 1.
 
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I have used RAID 1 with a hot spare before. It just depends on the RAID controller you are using.
 
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I read [ EXPENSIVE ] here 😉
 
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Actually no. I'm pretty sure I used it on an older motherboard. If I remember correctly, it was the onboard RAID controller on a MSI K8N Neo4 (Ultra) Platinum motherboard that I got back in 2006. Anyhow, there are controllers out there that support this and yes, some can get very pricey.
 
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Hi Petrossa,

Thanks for the answer. So the hot spare function is only available in RAID 5 and 6.
 
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Hi Hawkeye22,

Is there a way to have a RAID 1 hot spare? Or it need extra hardware to make it done?

Thank you.

Best Regards,
Khairul

 
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If your motherboard or current RAID contoller doesn't support RAID 1 with a hot spare, then you are out of luck. You will need to purchase a contoller with that option if that is really what you want. RAID 1 isn't as cost effective as some other RAID types either.

That said, I see no need for RAID in a home setup. A good backup strategy would help you more in that case. Also, just so you understand, a RAID can lose 1 drive in an array(degraded state) and still function normally. Once the bad drive is replaced, the array will be rebuilt on the fly and will no longer be in a degraded state. A hot spare simply takes the place of the bad drive instead of waiting for it to be replaced and the bad drive will need replaced anyhow. In this case, the replacement drive normally becomes the new hot spare.

Also, as my associate has mentioned, if you have windows 10, storage spaces can be a benefit and shouldn't be overlooked.
 
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