Re: lug-bg: losh SATA performance

[Ангел Вълков <whitefang@xxxxxx>]

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Извинявам се предваритело за "некастрираното" писмо,
но е доста стар пост и сигурно няма да е много ясно за що иде реч.
Аз имам подобен проблем: SATA контролера е интелски
и трансфера е нисък и под Fedora Core 1 - оригиналния кърнъл и 
мой си кърнел компилиран от fedora kernel sources + NTFS support
и под WinXPSP1+UR1 + някви preselected
от compaq пачове. Дали проблема не е в желязото?!

On Thursday 26 February 2004 13:52, Andrey Andreev wrote:
> Zdrawejte,
>
> Na mashinata si imam 2 diska:
> /dev/hda -> 80 GB Maxtor DiamondMax 9+ (Parallel ATA) 6Y080L0
> i
> /dev/hde -> 160 GB Seagate Barracuda (Serial ATA) ST3160023AS
>
> hda e zakachen na NForce2 ide controller (paralelen interface) wgraden w
> chipseta
> hde e zakachen na Silicon Image SiI3112 Serial ATA controller, zalepen
> na dynoto
>
> Linuxyt e Fedora Core 1, s Fedora stock kernel 2.4.22-1.2174.nptl
>
> hdparm-s sa slednite
>
> [root@brie home]# hdparm  /dev/hda
>
> /dev/hda:
> ~ multcount    = 16 (on)
> ~ IO_support   =  3 (32-bit w/sync)
> ~ unmaskirq    =  1 (on)
> ~ using_dma    =  1 (on)
> ~ keepsettings =  0 (off)
> ~ readonly     =  0 (off)
> ~ readahead    =  8 (on)
> ~ geometry     = 9964/255/63, sectors = 160086528, start = 0
> [root@brie home]# hdparm  /dev/hde
>
> /dev/hde:
> ~ multcount    = 16 (on)
> ~ IO_support   =  3 (32-bit w/sync)
> ~ unmaskirq    =  1 (on)
> ~ using_dma    =  1 (on)
> ~ keepsettings =  0 (off)
> ~ readonly     =  0 (off)
> ~ readahead    =  8 (on)
> ~ geometry     = 19457/255/63, sectors = 312581808, start = 0
>
>
> problemyt e sledniq:
>
> [root@brie home]# hdparm -T -t /dev/hda
>
> /dev/hda:
> ~ Timing buffer-cache reads:   1688 MB in  2.00 seconds = 844.00 MB/sec
> ~ Timing buffered disk reads:  160 MB in  3.09 seconds =  51.78 MB/sec
> [root@brie home]# hdparm -T -t /dev/hde
>
> /dev/hde:
> ~ Timing buffer-cache reads:   1688 MB in  2.00 seconds = 844.00 MB/sec
> ~ Timing buffered disk reads:   78 MB in  3.07 seconds =  25.41 MB/sec
>
>
> T.e. SATA diskyt e znachitelno po bawen ot drugiq. Towa e osezaemo i pri
> rabota. Wyprosyt e che ne bi trqbwalo da e taka...
>
> Imate li nqkakwi idei kak da oprawq performance-a na wyprosniq disk.
>
> Mersi predwaritelno.
>
> Andrey Andreev
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