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For best data protection: Raid 1 or Raid 5?

Last response: in Storage
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August 11, 2011 3:34:47 PM

Ok, I am a lazy data protector. If I have multiple drives set in RAID 1 I probably won't even replace a defective drive until I'm down to one left.

That being said, will the performance increase with RAID 5 make moving to RAID 5 worth it? If I have a drive failure, will the RAID 5 still work so I can grab the data and then replace a drive?
a b G Storage
August 16, 2011 8:11:07 PM

ahthurungnone said:
Ok, I am a lazy data protector. If I have multiple drives set in RAID 1 I probably won't even replace a defective drive until I'm down to one left.

That being said, will the performance increase with RAID 5 make moving to RAID 5 worth it? If I have a drive failure, will the RAID 5 still work so I can grab the data and then replace a drive?


Yes, RAID5 will give you more speed... It's a function of spindles more drive more speed - that is the general.

Raid5 utilize space more efficient than RAID1 or RAID10. If you have a hot spare, then the RAID will grab that drive and rebuilt immediately.

Or of course you can just HOT-PLUG ( this works best) a replace drive, it will rebuilt
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a b G Storage
August 17, 2011 1:13:38 AM

As far as data protection, RAID1 absolutely offers better data protection than RAID5. With RAID 1 you will have 2 fully independent copies of your data, where with RAID 5 it has to be calculated across the remaining drives. Remeber also that performance will become awful if 1 of the drives in RAID 5 is dead (OP stated he probably won't replace a drive).
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August 17, 2011 1:34:59 PM

Best answer selected by ahthurungnone.
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a c 289 G Storage
August 18, 2011 1:34:46 PM

Allow me to shout: RAID IS NO SUBSTITUTE FOR BACKUPS. DO BACKUPS ANYWAY.
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