RAID 101

**Praetor** · 03-30-2005, 05:22 PM

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

**Praetor** · 03-30-2005, 05:22 PM

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

**Praetor** · 03-30-2005, 05:22 PM

RAID 0+5 (RAID05) and RAID 5+0 (RAID50) - Block-Stripe + Distributed Parity + Block Stripe

**Praetor** · 03-30-2005, 05:22 PM

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

**Praetor** · 03-30-2005, 05:22 PM

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)

03-30-2005, 05:22 PM	#11 (permalink)
Praetor Administrator Join Date: Jul 2004 Location: Canada Age: 24 Posts: 19,946	*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 __________________ ASUS P5K Premium WiFi-AP, Q6600@3.7 / ASUS P5ND, E6400@3.8 4GB OCz Platinum XTC 8500 / 4GB CorsairXMS2 6400 5x500GB Seagate 7200.10 / 2x500 Seagate 7200.10 OCz 8800GTX 768MB @ 630/800 / 2x Galaxy 8800GT SLI

03-30-2005, 05:22 PM	#12 (permalink)
Praetor Administrator Join Date: Jul 2004 Location: Canada Age: 24 Posts: 19,946	*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 __________________ ASUS P5K Premium WiFi-AP, Q6600@3.7 / ASUS P5ND, E6400@3.8 4GB OCz Platinum XTC 8500 / 4GB CorsairXMS2 6400 5x500GB Seagate 7200.10 / 2x500 Seagate 7200.10 OCz 8800GTX 768MB @ 630/800 / 2x Galaxy 8800GT SLI

03-30-2005, 05:22 PM	#13 (permalink)
Praetor Administrator Join Date: Jul 2004 Location: Canada Age: 24 Posts: 19,946	*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 __________________ ASUS P5K Premium WiFi-AP, Q6600@3.7 / ASUS P5ND, E6400@3.8 4GB OCz Platinum XTC 8500 / 4GB CorsairXMS2 6400 5x500GB Seagate 7200.10 / 2x500 Seagate 7200.10 OCz 8800GTX 768MB @ 630/800 / 2x Galaxy 8800GT SLI

03-30-2005, 05:22 PM	#14 (permalink)
Praetor Administrator Join Date: Jul 2004 Location: Canada Age: 24 Posts: 19,946	*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 __________________ ASUS P5K Premium WiFi-AP, Q6600@3.7 / ASUS P5ND, E6400@3.8 4GB OCz Platinum XTC 8500 / 4GB CorsairXMS2 6400 5x500GB Seagate 7200.10 / 2x500 Seagate 7200.10 OCz 8800GTX 768MB @ 630/800 / 2x Galaxy 8800GT SLI

03-30-2005, 05:22 PM	#15 (permalink)
Praetor Administrator Join Date: Jul 2004 Location: Canada Age: 24 Posts: 19,946	*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) __________________ ASUS P5K Premium WiFi-AP, Q6600@3.7 / ASUS P5ND, E6400@3.8 4GB OCz Platinum XTC 8500 / 4GB CorsairXMS2 6400 5x500GB Seagate 7200.10 / 2x500 Seagate 7200.10 OCz 8800GTX 768MB @ 630/800 / 2x Galaxy 8800GT SLI

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