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Performance differences with RAID versus Storage Spaces

azasadny

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On my Win 8.1 Test PC, I had Storage Spaces set up and this was my performance...


I then setup a 3 disk RAID6 array using the same hard drives and an Intel RS2BL080 RAID card...



Does this look right?
 

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  • Disk speed for 4 SATA drives in Storage Spaces.JPG
    Disk speed for 4 SATA drives in Storage Spaces.JPG
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  • Disk speed for 3 SATA drives in RAID 6 using RS2BL080 card.JPG
    Disk speed for 3 SATA drives in RAID 6 using RS2BL080 card.JPG
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pparks1

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I'm not sure how you could configure a 3 disk RAID 6 array. RAID 6 requires a minimum of 4 drives.

Are you sure you didn't set up RAID 5?
 

My Computer

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azasadny

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I agree, I thought that RAID 6 required 4 drives, but I have 3 x 500GB drives attached and I thought i was setting up RAID 5, which would have given me n-1 drives (1.5TB -500GB = 1TB), but when the RAID was initialized and configured, I had 500GB of available disk (n-2) and the label said "RAID 6", so I'm a little confused by that. If you've ever used Intel's RAID tools, you agree with me that they were taking some hallucinogenic drugs at the time they were developing it... I'll look at it again later this week when I have some free time.
 

My Computer

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    Home built Intel i7-3770k-based system
    CPU
    Intel i7-3770k, Overclocked to 4.6GHz (46x100) with Corsair H110i GT cooler
    Motherboard
    ASRock Z77 OC Formula 2.30 BIOS
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    Creative Sound Blaster X-Fi Titanium HD, Corsair SP2500 speakers and subwoofer
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    Corsair Air 540 with 7 x 140mm fans on front, rear and top panels
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pparks1

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Well, "if" the Intel tools let you set this up, you end up with only 1 spindle for data and 2 other spindles that are doing nothing more than calculating parity. It's not much of a RAID. The point of RAID is partially to get better performance and space by using multiple spindles for data, and then provide some redundancy to protect against a single hard drive failure.
 

My Computer

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    Patrick Parks
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    Intel Q9550 2.83Ghz OC'd to 3.40Ghz
    Motherboard
    Gigabyte GA-EP45-UD3R rev. 1.1, F12 BIOS
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    8GB G.Skill PI DDR2-800, 4-4-4-12 timings
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    EVGA 1280MB Nvidia GeForce GTX570
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    Realtek ALC899A 8 channel onboard audio
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    Intel X25-M 80GB Gen 2 SSD
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    PSU
    Corsair 620HX modular
    Occupation
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    Antec P182
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    stock
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    ABS M1 Mechanical
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azasadny

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This is what the RAID BIOS shows....

So, 3 500GB hard drives, but the RAID setup indicates "RAID6" with available disk of 500GB. How can I have RAID 6 with only three hard drives? I thought RAID5 would require three drives and I tried to configure that and it indicates RAID 6 instead...
 

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My Computer

System One

  • OS
    Win 10 Pro 64bit
    Name
    Art Zasadny
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Home built Intel i7-3770k-based system
    CPU
    Intel i7-3770k, Overclocked to 4.6GHz (46x100) with Corsair H110i GT cooler
    Motherboard
    ASRock Z77 OC Formula 2.30 BIOS
    Memory
    32GB DDR3 2133 Corsair Vengeance Pro
    Graphics Card(s)
    GeForce GTX 980ti SC ACS 6GB DDR5 by EVGA
    Sound Card
    Creative Sound Blaster X-Fi Titanium HD, Corsair SP2500 speakers and subwoofer
    Monitor(s) Displays
    LG 27EA33 [Monitor] (27.2"vis) HDMI
    Screen Resolution
    1920x1080
    Hard Drives
    Samsung SSD 850 EVO 250GB (system drive)
    WD 6TB Red NAS hard drives x 2 in Storage Spaces (redundancy)
    PSU
    Corsair 750ax fully modular power supply with sleeved cables
    Occupation
    IT Security and Controls Engineer (Endpoint Securi
    Case
    Corsair Air 540 with 7 x 140mm fans on front, rear and top panels
    Cooling
    Corsair H110i GT liquid cooled CPU with 4 x 140" Corsair SP "push-pull" and 3 x 140mm fans
    Keyboard
    Thermaltake Poseidon Z illuminated keyboard
    Mouse
    Corsair M65 wired
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pparks1

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Raid 5 would have provided 1tb of disk space, 2 spindles at 500gb each, with 1 parity drive.

Raid 6 does double parity and provides for double disk failure, but in your case with 3 drives your DATA all goes on 1 spindle and it double calculates parity on the other 2 drives. So, not really much of a raid...Just 1 spindle. Might as well run a raid 0 mirror, it would save you the penalty of calculating parity.
 

My Computer

System One

  • OS
    Windows 7
    Name
    Patrick Parks
    System Manufacturer/Model
    Self-Built in July 2009
    CPU
    Intel Q9550 2.83Ghz OC'd to 3.40Ghz
    Motherboard
    Gigabyte GA-EP45-UD3R rev. 1.1, F12 BIOS
    Memory
    8GB G.Skill PI DDR2-800, 4-4-4-12 timings
    Graphics Card(s)
    EVGA 1280MB Nvidia GeForce GTX570
    Sound Card
    Realtek ALC899A 8 channel onboard audio
    Monitor(s) Displays
    23" Acer x233H
    Screen Resolution
    1920x1080
    Hard Drives
    Intel X25-M 80GB Gen 2 SSD
    Western Digital 1TB Caviar Black, 32MB cache. WD1001FALS
    PSU
    Corsair 620HX modular
    Occupation
    Systems Engineer.
    Case
    Antec P182
    Cooling
    stock
    Keyboard
    ABS M1 Mechanical
    Mouse
    Logitech G9 Laser Mouse
    Internet Speed
    15/2 cable modem
    Other Info
    Windows and Linux enthusiast. Logitech G35 Headset.
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azasadny

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Yep! I'm going to rebuild the array today and see what happens. I was just experimenting with this card as it was in a PC that ran video rendering at church and caused numerous issues with the PC. After we replaced the card, we had no further issues, so I believe the card is faulty. It's far out of warranty, so I'll probably pitch it soon...
Thanks!!
 

My Computer

System One

  • OS
    Win 10 Pro 64bit
    Name
    Art Zasadny
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Home built Intel i7-3770k-based system
    CPU
    Intel i7-3770k, Overclocked to 4.6GHz (46x100) with Corsair H110i GT cooler
    Motherboard
    ASRock Z77 OC Formula 2.30 BIOS
    Memory
    32GB DDR3 2133 Corsair Vengeance Pro
    Graphics Card(s)
    GeForce GTX 980ti SC ACS 6GB DDR5 by EVGA
    Sound Card
    Creative Sound Blaster X-Fi Titanium HD, Corsair SP2500 speakers and subwoofer
    Monitor(s) Displays
    LG 27EA33 [Monitor] (27.2"vis) HDMI
    Screen Resolution
    1920x1080
    Hard Drives
    Samsung SSD 850 EVO 250GB (system drive)
    WD 6TB Red NAS hard drives x 2 in Storage Spaces (redundancy)
    PSU
    Corsair 750ax fully modular power supply with sleeved cables
    Occupation
    IT Security and Controls Engineer (Endpoint Securi
    Case
    Corsair Air 540 with 7 x 140mm fans on front, rear and top panels
    Cooling
    Corsair H110i GT liquid cooled CPU with 4 x 140" Corsair SP "push-pull" and 3 x 140mm fans
    Keyboard
    Thermaltake Poseidon Z illuminated keyboard
    Mouse
    Corsair M65 wired
    Internet Speed
    85MBps DSL
    Browser
    Chrome and Edge
    Antivirus
    Windows Defender, MalwareBytes Pro and CCleaner Pro
    Other Info
    Client of Windows Server 2012 R2 10 PC's, laptops and smartphones on the WLAN.

    1GBps Ethernet ports
    Country Flag
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    State/Region Flag
    us michigan

azasadny

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RAID 0 performance

I rebuilt the RAID array as a RAID 0 and ran this benchmark... 3 x 500GB Samsung drives...
 

Attachments

  • Disk speed for 3 drives in RAID 0.JPG
    Disk speed for 3 drives in RAID 0.JPG
    45.3 KB · Views: 134

My Computer

System One

  • OS
    Win 10 Pro 64bit
    Name
    Art Zasadny
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Home built Intel i7-3770k-based system
    CPU
    Intel i7-3770k, Overclocked to 4.6GHz (46x100) with Corsair H110i GT cooler
    Motherboard
    ASRock Z77 OC Formula 2.30 BIOS
    Memory
    32GB DDR3 2133 Corsair Vengeance Pro
    Graphics Card(s)
    GeForce GTX 980ti SC ACS 6GB DDR5 by EVGA
    Sound Card
    Creative Sound Blaster X-Fi Titanium HD, Corsair SP2500 speakers and subwoofer
    Monitor(s) Displays
    LG 27EA33 [Monitor] (27.2"vis) HDMI
    Screen Resolution
    1920x1080
    Hard Drives
    Samsung SSD 850 EVO 250GB (system drive)
    WD 6TB Red NAS hard drives x 2 in Storage Spaces (redundancy)
    PSU
    Corsair 750ax fully modular power supply with sleeved cables
    Occupation
    IT Security and Controls Engineer (Endpoint Securi
    Case
    Corsair Air 540 with 7 x 140mm fans on front, rear and top panels
    Cooling
    Corsair H110i GT liquid cooled CPU with 4 x 140" Corsair SP "push-pull" and 3 x 140mm fans
    Keyboard
    Thermaltake Poseidon Z illuminated keyboard
    Mouse
    Corsair M65 wired
    Internet Speed
    85MBps DSL
    Browser
    Chrome and Edge
    Antivirus
    Windows Defender, MalwareBytes Pro and CCleaner Pro
    Other Info
    Client of Windows Server 2012 R2 10 PC's, laptops and smartphones on the WLAN.

    1GBps Ethernet ports
    Country Flag
    USA
    State/Region Flag
    us michigan

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