[LUGOS] ATA RAID

[Simon Golicnik]

>
> CD zraven adapteca je bootable rdeca kapica.
>
> performanse, vse s hdparm -Tt
> /dev/sdc:
>   Timing buffer-cache reads:   128 MB in  0.93 seconds =137.63 MB/sec
>   Timing buffered disk reads:  64 MB in  2.96 seconds = 21.62 MB/sec
> #hdparm -Tt /dev/sda
>
> /dev/sda:
>   Timing buffer-cache reads:   128 MB in  1.01 seconds =126.73 MB/sec
>   Timing buffered disk reads:  64 MB in  2.38 seconds = 26.89 MB/sec
>
> masina je dvojni Pentium 2, 600 MHz. SCSI diski:
>
> scsi2 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.8
>          <Adaptec aic7896/97 Ultra2 SCSI adapter>
>          aic7896/97: Ultra2 Wide Channel B, SCSI Id=7, 32/253 SCBs
>
>    Vendor: IBM       Model: DMVS36V           Rev: 0250
>    Type:   Direct-Access                      ANSI SCSI revision: 03
>
>
> Zakljucek:
> Za karkoli resnejsega je price/performance najboljsa resitev
> 2400A ali kaj podobnega + poceni IDE diski. Raid 5 za kolicino + zascito.
>
> Na malce mlajsi masini mi SCSI disk pravi:
> /dev/sda:
>   Timing buffer-cache reads:   128 MB in  0.61 seconds =209.84 MB/sec
>   Timing buffered disk reads:  64 MB in  1.25 seconds = 51.20 MB/sec
> kar stane malce vec...
>
>
> Lahko prosim za kake podobne stevilke na resnejsih masinah?
>
> LP
>
> Iztok
Pri 3ware 7500-8 , dual xeon 2400, 7x120G WD diski v raid 5 + 1 hot spare je
rezultat :

/dev/sda:
 Timing buffer-cache reads:   128 MB in  0.28 seconds =458.32 MB/sec
 Timing buffered disk reads:  64 MB in  0.68 seconds = 94.43 MB/sec

LP Simon