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Thread: WD Velociraptor RAID0 Review

  1. #1 SP
    Admin MonkY's Avatar

    Post WD Velociraptor RAID0 Review

    Pana nu demult eram complet convins impotriva unei solutii RAID0 pe calculator. Pe langa cresterea cu 50% a sansei de a pierde datele, viteza castigata si problemele cauzate de controllere RAID care de care mai obscure... nu atrageau deloc asupra unui astfel de setup.

    Insa dupa ceva timp de folosire a Raptor-ului de 74GB (10.000 RPM) de la Western Digital insa, m-am convins de fiabilitatea unui astfel de HDD, iar la urmatorul upgrade la versiunea de 150GB (unde s-a mai simtit o crestere de viteza) m-am convins sa trec pe RAID0, totodata folosind o solutie de backup pe un HDD extern (eSATA).

    De curand insa a fost lansat VelociRaptor, un HDD care pe mine m-a socat. Pe langa faptul ca este cu cel putin 30% mai rapid in toate testele, ca a fost scazut timpul de acces si trecut pe interfata SATA2... well, pe langa toate acestea, te uiti la el si te minunezi. Western Digital a schimbat complet "foaia", trecand la un HDD de 2.5" in loc de 3.5" cum sunt toate HDD-urile de desktop. Fanii laptop-urilor insa sa nu sara in sus de bucurie, intrucat HDD-ul este "sudat" intr-un cage de 3.5" care are si rol de radiator, functie pe care o rezolva cu brio.

    Temperaturile pentru un HDD de 10.000 RPM cum este Velociraptor pe mine m-au impresionat. Daca in acelasi sistem cu o temperatura ambianta de 30 grade, HDD-urile de 7200 RPM stateau "cuminti" la 40-41 grade, VelociRaptor-ul nici macar in full load nu l-am vazut sa depaseasca 34-35 grade.

    Trecand la setupul RAID0 pe un ICH9R (chipset X38), mi-am adus aminte si de greseala facuta pe vecihul setup RAIDO cu Raptor-urile de 150GB. Si aici o sa atrag atentia tuturor celor care instaleaza Intel Matrix Storage driver, ca dupa instalare, sa porneasca Intel Matrix Storage Console, si sa mearga in Array_0000 - Volumes - Volume0, sa dea click dreapta si "Enable Volume Write-Back Cache". In mod normal e o functie care putea fi activata si in Device Manager, insa dupa instalarea driverelor Intel, acel checkbox este dezactivat. Voi atasa mai jos ca sa vedeti si diferenta dintre WriteBack Cache ON si OFF.

    Singurul downside al achizitionarii unui astfel de HDD ar fi insa pretul. La aceeasi bani pentru cineva care pretuieste mai mult spatiul, ati putea sa achizitionati un HDD de 1TB si sa ramaneti si cu ceva banuti. Pretul unui VelociRaptor este insa mult mai ok decat al unui HDD SCSI/SAS de 10.000RPM, iar singurul HDD care sa-l intreaca in momentul de fata ar fi un HDD SSD. Din pacate, la un SSD care sa aiba 1ms (sau sub) timp de acces, platiti un pret de 3-4 ori mai mare, si veti avea spatiul de 3-4 ori mai mic. Asa ca pana se maturizeaza SSD-ul si vor scadea preturile la producerea lor, VelociRaptor mi se pare ca are cel mai bun ratio in clasa 'performance".

    SPECIFICATII VELOCIRAPTOR:
    -----------------------------------------------
    Rotational Speed 10,000 RPM (nominal)
    Buffer Size 16 MB
    Average Latency 3.00 ms (nominal)
    Load/unload Cycles 50,000 minimum
    Read Seek Time 4.2 ms
    Write Seek Time 4.7 ms (average)
    Track-To-Track Seek Time 0.7 ms (average)
    Transfer Rates Buffer To Host (Serial ATA) 3 Gb/s (Max)
    Formatted Capacity 300,069 MB
    Capacity 300 GB
    Interface SATA 3 Gb/s
    User Sectors Per Drive 586,072,368
    Height 15 mm (Max)
    Length 100 mm 0.2 mm
    Width 69.85 0.25 mm
    Weight 219 gm
    Operating Shock (Read) 65G, 2 ms
    Non-operating Shock 300G, 2 ms
    Idle Mode 29 dBA (average)
    Seek Mode 0 34 dBA (average)
    Operating 5 C to 55 C
    Non-operating -40 C to 70 C
    Operating 5-95% RH non-condensing
    Non-operating 5-95% RH non-condensing
    Altitude Operating -305M to 3,050M
    Altitude Non-operating -305M to 12,200M
    Vibration Operating Linear 20-300 Hz, 0.75G (0 to peak)
    Vibration Operating Random 10-300 Hz, 0.008 g / Hz
    Vibration Non-operating Low Frequency 0.05 g/Hz (10 to 300 Hz)
    Vibration Non-operating High Frequency 20-500 Hz, 4.0G (0 to peak)
    Electrical Specifications Current Requirements:
    12 VDC
    Read/Write 225 mA
    Idle 200 mA
    Standby 6 mA
    Sleep 6 mA
    5 VDC
    Read/Write 675 mA
    Idle 425 mA
    Standby 70 mA
    Sleep 70 mA
    Power Dissipation:
    Read/Write 6.08 Watts
    Idle 4.53 Watts
    Standby 0.42 Watts
    Sleep 0.42 Watts

    SISTEMUL DE TEST:
    -----------------------------------------------
    MB Asus Maximus Formula
    CPU Intel E8500 @ 4Ghz
    RAM 4GB RAM Mushkin @ 1066Mhz
    GPU nVidia GeForce 8800GT 512
    ATX Enermax 620W
    HDD WD 7500AAKS (WD 750GB 7200 RPM)
    HDD WD 7500AYYS (WD 750 GB 7200 RPM)
    HDD WD 1001FALS (WD 1TB 7200 RPM - WD BLACK SERIES)
    HDD WD 3000GLFS (WD 300 GB 1000 RPM - VELOCIRAPTOR)


    Si rezultatele ar fi urmatoarele:

    MINIMUM TRANSFER RATE:
    -----------------------------------------------
    WD 7500AAKS (WD 750GB 7200 RPM) : 49.7 MB/s
    WD 7500AYYS (WD 750 GB 7200 RPM) : 48.7 MB/s
    HDD WD 1001FALS (WD 1TB 7200 RPM) : 47.7 MB/s
    WD 3000GLFS (VELOCIRAPTOR SINGLE) : 44.3 MB/s
    WD 3000GLFS (VELOCIRAPTOR RAID0) : 69.1 MB/s
    WD 3000GLFS (VELOCIRAPTOR RAID0 WB ON) : 134.8 MB/s

    MAXIMUM TRANSFER RATE:
    -----------------------------------------------
    WD 7500AAKS (WD 750GB 7200 RPM) : 97.5 MB/s
    WD 7500AYYS (WD 750 GB 7200 RPM) : 97.6 MB/s
    HDD WD 1001FALS (WD 1TB 7200 RPM) : 103.6 MB/s
    WD 3000GLFS (VELOCIRAPTOR SINGLE) : 119.8 MB/s
    WD 3000GLFS (VELOCIRAPTOR RAID0) : 212.1 MB/s
    WD 3000GLFS (VELOCIRAPTOR RAID0 WB ON) : 226.9 MB/s

    AVERAGE TRANSFER RATE:
    -----------------------------------------------
    WD 7500AAKS (WD 750GB 7200 RPM) : 77.1 MB/s
    WD 7500AYYS (WD 750 GB 7200 RPM) : 78.4 MB/s
    HDD WD 1001FALS (WD 1TB 7200 RPM) : 84.2 MB/s
    WD 3000GLFS (VELOCIRAPTOR SINGLE) : 100.7 MB/s
    WD 3000GLFS (VELOCIRAPTOR RAID0) : 178.0 MB/s
    WD 3000GLFS (VELOCIRAPTOR RAID0 WB ON) : 186.3 MB/s

    ACCESS TIME:
    -----------------------------------------------
    WD 7500AAKS (WD 750GB 7200 RPM) : 13.6 ms
    WD 7500AYYS (WD 750 GB 7200 RPM) : 13.8 ms
    HDD WD 1001FALS (WD 1TB 7200 RPM) : 14.3 ms
    WD 3000GLFS (VELOCIRAPTOR SINGLE) : 7.4 ms
    WD 3000GLFS (VELOCIRAPTOR RAID0) : 7.2 ms
    WD 3000GLFS (VELOCIRAPTOR RAID0 WB ON) : 7.2 ms

    BURST RATE:
    -----------------------------------------------
    WD 7500AAKS (WD 750GB 7200 RPM) : 127 MB/s
    WD 7500AYYS (WD 750 GB 7200 RPM) : 128 MB/s
    HDD WD 1001FALS (WD 1TB 7200 RPM) : 134.6 MB/s
    WD 3000GLFS (VELOCIRAPTOR SINGLE) : 199.8 MB/s
    WD 3000GLFS (VELOCIRAPTOR RAID0) : 198.8 MB/s
    WD 3000GLFS (VELOCIRAPTOR RAID0 WB ON) : 3303.3 MB/s

    CPU USAGE:
    -----------------------------------------------
    WD 7500AAKS (WD 750GB 7200 RPM) : 1.4%
    WD 7500AYYS (WD 750 GB 7200 RPM) : 1.6%
    HDD WD 1001FALS (WD 1TB 7200 RPM) : 2.1%
    WD 3000GLFS (VELOCIRAPTOR SINGLE) : 1.8%
    WD 3000GLFS (VELOCIRAPTOR RAID0) : 4.0%
    WD 3000GLFS (VELOCIRAPTOR RAID0 WB ON) : 3.7%
    Attached Images Attached Images hdtune_benchmark_wdc_wd7500ayys-01rca.png hdtune_benchmark_wdc_wd7500aaks-00rba.png hdtune_benchmark_wdc_wd3000glfs-01f8u.png hdtune_benchmark_wdc_wd1001fals-00j7b.png hdtune_benchmark_intel___raid_0_volume.png hdtune_benchmark_intel___raid_0_volume_write_back_on.png velociraptor.jpg

  2. #2 SP
    Member Snake's Avatar
    Nice review MonkY. 186MB/s e ceva pt. average read. Dar ma intriga acel Burst Rate de 3303,3 MB/s. Ce-i cu el ?

  3. #3 SP
    Q
    Member Q's Avatar
    Snake
    Burst Rate : The burst rate is the highest speed (in megabytes per second) at which data can be transferred from the drive interface (IDE or SCSI for example) to the operating system.


    Sa-ti traiasca Raptoarele. Am atasat ceva screen-uri cu un RAID mai putin evoluat, 2x WD250AAAKS 16MB 7200rpm. Merita !
    Attached Images Attached Images 2008-08-19_raid0_2wd250gb16mb_hdtunepro_wb_disabled.jpg 2008-08-19_raid0_2wd250gb16mb_hdtunepro_wb_enabled.jpg 2008-08-19_raid0_2wd250gb16mb_hdtach_wb_disabled.jpg

  4. #4 SP
    Admin MonkY's Avatar
    Quote Originally Posted by Q View Post
    Sa-ti traiasca Raptoarele. Am atasat ceva screen-uri cu un RAID mai putin evoluat, 2x WD250AAAKS 16MB 7200rpm. Merita !
    Eu nu inteleg cum de ti-a dat tie mai putin cu WriteBack cache-ul ON decat cu el dezactivat. Also, 55% CPU usage ? Sigur faceai tu ceva pe-acolo...

  5. #5 SP
    Q
    Member Q's Avatar
    Dap, am corectat .... am pus un screen cu bench dupa ce a terminat de convertit mvk - mp4, asta faceam

    Oricum chiar si asa sint departe HDD-urile lumesti de Raptoarele alea

  6. #6 SP
    Admin MonkY's Avatar
    Am adaugat la review si rezultatele benchmarkurilor pentru noul HDD de la Western WD1001FALS, din seria Black, de 1TB. Enjoy

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