Messages in this thread |  | | Date | Sat, 16 Jun 2001 16:24:35 +0100 | From | Rachel Greenham <> | Subject | Re: VIA KT133A crash *post* 2.4.3-ac6 |
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Thomas Molina wrote:
>I've tried most of the tests you all have been discussing, with a couple >of exceptions. I haven't tried bonnie ( don't even know where to get it >or what it is supposed to test ). > Well, it's part of the SuSE distribution at least, and it tests hard disk performance - you need to give it a test size greater than your system's memory or all you're testing is Linux's ability to buffer reads and writes. :-) So for my 512Mb system I use "bonnie -s 1024"
>><redundant>as long as you're sure you do have DMA enabled that is - SuSE >>at least leaves it disabled by default, under which conditions all >>kernels are stable for me</redundant> >> > >Fairly certain. I could be misinterpreting things, though. Here is some >output I'm seeing: > Compare:
>[root@localhost /root]# hdparm -tT /dev/hde > >/dev/hde: > Timing buffer-cache reads: 128 MB in 0.70 seconds =182.86 MB/sec > Timing buffered disk reads: 64 MB in 2.31 seconds = 27.71 MB/sec > root@hex:/home/rachel > hdparm -tT /dev/hde /dev/hde: Timing buffer-cache reads: 128 MB in 0.66 seconds =193.94 MB/sec Timing buffered disk reads: 64 MB in 2.11 seconds = 30.33 MB/sec
>[root@localhost /root]# hdparm /dev/hde > >/dev/hde: > multcount = 0 (off) > I/O support = 0 (default 16-bit) > unmaskirq = 0 (off) > using_dma = 1 (on) > keepsettings = 0 (off) > nowerr = 0 (off) > readonly = 0 (off) > readahead = 8 (on) > geometry = 3649/255/63, sectors = 58633344, start = 0 >
root@hex:/home/rachel > hdparm /dev/hde
/dev/hde: multcount = 16 (on) I/O support = 3 (32-bit w/sync) unmaskirq = 0 (off) using_dma = 1 (on) keepsettings = 0 (off) nowerr = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 79780/16/63, sectors = 80418240, start = 0
I have 32-bit IO (with sync) and multiple sector transfers enabled, where you don't. I don't expect that's the cause of the problem though - For instance, I can run reliably with any kernel with those enabled, as long as DMA is disabled.
> >[root@localhost /root]# hdparm -i /dev/hde > >/dev/hde: > > Model=WDC WD300BB-00AUA1, FwRev=18.20D18, SerialNo=WD-WMA6W1592536 > Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq >} > RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40 > BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=off > CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=58633344 > IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} > PIO modes: pio0 pio1 pio2 pio3 pio4 > DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 > root@hex:/home/rachel > hdparm -i /dev/hde /dev/hde: Model=IBM-DTLA-305040, FwRev=TW4OA60A, SerialNo=YJEYJLG3070 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=40 BuffType=DualPortCache, BuffSize=380kB, MaxMultSect=16, MultSect=16 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=80418240 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 Drive Supports : Reserved : ATA-2 ATA-3 ATA-4 ATA-5 Kernel Drive Geometry LogicalCHS=79780/16/63 PhysicalCHS=79780/16/63
. o O ( Dont' suppose any of this is useful to anyone... )
-- Rachel
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