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Old 03-30-2005, 05:22 PM   #11 (permalink)
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RAID 1+0 (RAID10) RAID 0+1 (RAID01) - Mirroring and Striping
  • RAID10/RAID 1+0 is a stripe across a mirror while RAID01/RAID 0+1 is a mirror across a stripe
  • Both of these RAID configurations require four drives for implmentation
  • RAID10/RAID 1+0 has the same fault tolerance as a RAID1 configuration (i.e., the data is mirrored so not much is required for recovery), RAID 01/RAID 0+1 has the same fault tolerance as RAID5 (single drive failure)
  • Both read and write performance is very good
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Old 03-30-2005, 05:22 PM   #12 (permalink)
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RAID 0+3 (RAID03) and RAID 3+0 (RAID30) - Byte Stripe + Parity + Block Stripe
  • Like RAID3, read performance is exceptional (improved due to the increased striping), write performance is also (relatively) improved
  • Fault tolerance is a single drive
  • A minimum of six drives is required for implementation
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Old 03-30-2005, 05:22 PM   #13 (permalink)
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RAID 0+5 (RAID05) and RAID 5+0 (RAID50) - Block-Stripe + Distributed Parity + Block Stripe
  • Very similar all around to RAID5 and is used often to improve storage capacity
  • Fault tolerance is a maximum of three drives
  • A minimum of six drives is required for implementation
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Old 03-30-2005, 05:22 PM   #14 (permalink)
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RAID 1+5 (RAID15) and RAID 5+1 (RAID51) - Mirroring + Block-Stripe + Distributed Parity
  • Fault tolerance is potentially five drives
  • Read performance is very good, write performance is good due to the parity generation bottleneck
  • A minimum of six drives is required for implementation, number of drives must be even
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Old 03-30-2005, 05:22 PM   #15 (permalink)
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JBOD - Just a Bunch of Drives
  • Best comapred to RAID0 as there is no fault tolerance
  • Doesnt offer the [potential] performance benifits of RAID0 however it doesnt have the downside of (a) potential complete data loss and (b) drive efficiency is improved (while RAID0 arrays make use of totalSize = numberOfDrives x smallestDrive, a JBOD's maximum size is the sum total of the constituant drives)
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