Re: lug-bg: losh SATA performance

["Doncho N. Gunchev" <mr700@xxxxxxxxxxxx>]

On Thursday 11 March 2004 21:56, Ангел Вълков wrote:
> 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
> 
    Za 2.4.x qdra dokolkoto znam SATA poddryjkata e samo kato patch-owe i ne
se seshtam Fedora wkaraha li q w qdroto ili ne. Az imam 55.xx MB/sec w kyshti
na ide i 12MB/sec na SCSI raidowete tuk. Probite pod windows sa pokazali (ne
sym gi prawil az) che transfera na gadnite SCSI-ta si e syshtiq i pod windows
sys tehnite si drivers i t.n. taka che... oswen da spomenawam rodninite na
tez diskowe/dyna ne se seshtam kakwo moje da se naprawi. Probwai s 2.6.4 ot
direktoriqta na arjan w people.redhat.com - 2.6.x imat SATA support po rojdenie,
ako ne sym chel greshno razbira se.
http://people.redhat.com/arjanv/2.6/SRPMS.kernel/kernel-2.6.4-1.257.src.rpm
http://people.redhat.com/arjanv/2.6/RPMS.kernel/kernel-2.6.4-1.257.i686.rpm

btw: athlon modifikaciq na qdrata 2.6 weche nqma, zashtoto qdroto se 'patchwa'
ili kakwoto tam prawi samo i smisyla ot tqh e /dev/null kakto be obqsneno w
mail listata naskoro.

-- 
Regards,
  Doncho N. Gunchev    Registered Linux User #291323 at counter.li.org
  GPG-Key-ID: 1024D/DA454F79
  Key fingerprint = 684F 688B C508 C609 0371  5E0F A089 CB15 DA45 4F79
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