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<blockquote data-quote="Phatty2x4" data-source="post: 373616" data-attributes="member: 88277"><p>Nothing to forgive, you have it spot on! All your questions are exactly what you would do.</p><p></p><p>RAID 5 is an excellent way to store data - be it hardware or software. There is amazing write/read speed (remember this is home use so critical database writing speed isn't needed) for RAID 5. The protection is excellent as well. You can loose a drive and your data is safe.</p><p></p><p>Issue most users run into is that they assume RAID 5 is good enough to be a back up (it's acceptable back up storage) or worse, don't keep a spare drive for hard drive failure. When a drive dies - your array is in a critical state and can't afford to lose another drive. For most home use, it's overkill (in my opinion only!). Not only that, if the controller dies, you could be S.O.L. in either getting a replacement card or the new card not accepting the array (I do realize this a far reaching idea unless you are actually using a 5+ year old card but it is possible.) </p><p></p><p>The thing that's nice with disparity is that it is a distributed parity. You may grow the protection based on the size of the drive instead of being limited by the smallest drive in your array. Since the drives are independent, you may have the drives go to sleep when not in use.</p><p></p><p>With all this being said, disparity and FlexRAID are software based. You do need a beefier system if you don't want to deal with slow downs during the parity creation/verification phase. You also want to think about either getting a motherboard that has a fast built in sata controller or purchase a PCI-E 4x or 8x sata controller. This is purely for transfer speeds and parity builds (parity building speed is dependent upon you hard drive speed and how fast the controller can write 1's and 0's). </p><p></p><p>The great thing is if a slow down doesn't bother you, you don't need to upgrade anything. You just have to realize this initial party build (much like creating the RAID 5 array) will take a while.</p><p></p><p>In your case, I would do just what you postulated - back up the data. Remove the drives from the RAID card and put them on the local sata controller. Once the drives were enabled and formatted, move the data back and then build the parity.</p></blockquote><p></p>
[QUOTE="Phatty2x4, post: 373616, member: 88277"] Nothing to forgive, you have it spot on! All your questions are exactly what you would do. RAID 5 is an excellent way to store data - be it hardware or software. There is amazing write/read speed (remember this is home use so critical database writing speed isn't needed) for RAID 5. The protection is excellent as well. You can loose a drive and your data is safe. Issue most users run into is that they assume RAID 5 is good enough to be a back up (it's acceptable back up storage) or worse, don't keep a spare drive for hard drive failure. When a drive dies - your array is in a critical state and can't afford to lose another drive. For most home use, it's overkill (in my opinion only!). Not only that, if the controller dies, you could be S.O.L. in either getting a replacement card or the new card not accepting the array (I do realize this a far reaching idea unless you are actually using a 5+ year old card but it is possible.) The thing that's nice with disparity is that it is a distributed parity. You may grow the protection based on the size of the drive instead of being limited by the smallest drive in your array. Since the drives are independent, you may have the drives go to sleep when not in use. With all this being said, disparity and FlexRAID are software based. You do need a beefier system if you don't want to deal with slow downs during the parity creation/verification phase. You also want to think about either getting a motherboard that has a fast built in sata controller or purchase a PCI-E 4x or 8x sata controller. This is purely for transfer speeds and parity builds (parity building speed is dependent upon you hard drive speed and how fast the controller can write 1's and 0's). The great thing is if a slow down doesn't bother you, you don't need to upgrade anything. You just have to realize this initial party build (much like creating the RAID 5 array) will take a while. In your case, I would do just what you postulated - back up the data. Remove the drives from the RAID card and put them on the local sata controller. Once the drives were enabled and formatted, move the data back and then build the parity. [/QUOTE]
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