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SubjectRe: Yet another disk transfer speed problem
From
Date
Hi,

I would expect the disk which acts slower(maxtor) to be atleast as fast
as the other one (ibm).

reasons:

1. Both are 7200RPM
2. The slower one(maxtor hdg) is one of the newer ata133 disks while
that faster one is ata100(ibm hde). I would expect atleast equal
performance from both.


Thanks,

-bharath




On Thu, 2002-02-28 at 14:55, Joseph Malicki wrote:
> Have you considered that perhaps one of your drives is just faster than the
> other?
> This happens.
>
> -joe
>
> ----- Original Message -----
> From: "Bharath Krishnan" <bharath@mit.edu>
> To: <linux-kernel@vger.kernel.org>
> Sent: Thursday, February 28, 2002 11:34 AM
> Subject: Yet another disk transfer speed problem
>
>
> > Hello!
> >
> > Please CC: me on replies,
> >
> > Problem: ata disk on secondary controller of PDC20265
> > gives sub-par performance.
> >
> > both disks have c3 and d1 set along with X69.
> >
> > hdparm -tT /dev/hdg:
> > /dev/hdg:
> > Timing buffer-cache reads: 128 MB in 0.77 seconds =166.23 MB/sec
> > Timing buffered disk reads: 64 MB in 3.81 seconds = 16.80 MB/sec
> >
> > compared to
> > hdparm -tT /dev/hde:
> > /dev/hde:
> > Timing buffer-cache reads: 128 MB in 0.73 seconds =175.34 MB/sec
> > Timing buffered disk reads: 64 MB in 1.82 seconds = 35.16 MB/sec
> >
> >
> > Setup:
> > kernel: 2.4.17
> > pdc20265 controller on asus a7v motherboard.
> > kernel config options:
> > CONFIG_BLK_DEV_PDC202XX=y
> > CONFIG_PDC202XX_BURST=y
> > # CONFIG_PDC202XX_FORCE is not set
> > # CONFIG_BLK_DEV_ATARAID_PDC is not set
> >
> > similar behavior with redhat 7.2 updated kernel 2.4.9-21
> >
> > hde: IBM-DTLA-307015, ATA DISK drive
> > hdg: MAXTOR 6L040J2, ATA DISK drive
> >
> > Interesting stuff from dmesg:
> > ide2: BM-DMA at 0x8000-0x8007, BIOS settings: hde:DMA, hdf:pio
> > ide3: BM-DMA at 0x8008-0x800f, BIOS settings: hdg:DMA, hdh:pio
> >
> > cat /proc/ide/ide2/config
> > pci bus 00 device 88 vid 105a did 0d30 channel 0
> > 5a 10 30 0d 07 00 10 02 02 00 80 01 00 20 00 00
> > 01 94 00 00 01 90 00 00 01 88 00 00 01 84 00 00
> > 01 80 00 00 00 00 00 d4 00 00 00 00 5a 10 33 4d
> > 00 00 00 00 58 00 00 00 00 00 00 00 0a 01 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > be 33 00 00 00 00 00 00 01 00 01 00 00 00 00 00
> > f1 24 41 00 c4 f3 4f 00 f1 24 41 00 c4 f3 4f 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> >
> > cat /proc/ide/ide3/config
> > pci bus 00 device 88 vid 105a did 0d30 channel 1
> > 5a 10 30 0d 07 00 10 02 02 00 80 01 00 20 00 00
> > 01 94 00 00 01 90 00 00 01 88 00 00 01 84 00 00
> > 01 80 00 00 00 00 00 d4 00 00 00 00 5a 10 33 4d
> > 00 00 00 00 58 00 00 00 00 00 00 00 0a 01 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > be 33 00 00 00 00 00 00 01 00 01 00 00 00 00 00
> > f1 24 41 00 c4 f3 4f 00 f1 24 41 00 c4 f3 4f 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> >
> > hdparm -i
> > /dev/hde
> > Model=IBM-DTLA-307015, FwRev=TX2OA50C, SerialNo=YF0YFFX4393
> > Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
> > RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=40
> > BuffType=DualPortCache, BuffSize=1916kB, MaxMultSect=16, MultSect=16
> > CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=30003120
> > 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
> > AdvancedPM=yes: disabled (255)
> > Drive Supports : ATA/ATAPI-5 T13 1321D revision 1 : ATA-2 ATA-3 ATA-4
> > ATA-5
> >
> > /dev/hdg
> > Model=MAXTOR 6L040J2, FwRev=A93.0300, SerialNo=662125114610
> > Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
> > RawCHS=16383/16/63, TrkSize=32256, SectSize=21298, ECCbytes=4
> > BuffType=DualPortCache, BuffSize=1820kB, MaxMultSect=16, MultSect=16
> > CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=78177792
> > 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 udma6
> > AdvancedPM=no
> > Drive Supports : ATA/ATAPI-5 T13 1321D revision 1 : ATA-1 ATA-2 ATA-3
> > ATA-4 ATA-5
> >
> > cat /proc/ide/pdc202xx
> > PDC20265 Chipset.
> > ------------------------------- General Status
> > ---------------------------------Burst Mode :
> > enabled
> > Host Mode : Normal
> > Bus Clocking : 33 PCI Internal
> > IO pad select : 10 mA
> > Status Polling Period : 8
> > Interrupt Check Status Polling Delay : 11
> > --------------- Primary Channel ---------------- Secondary Channel ----
> > enabled enabled
> > 66 Clocking enabled enabled
> > Mode PCI Mode PCI
> > FIFO Empty FIFO Empty
> > --------------- drive0 --------- drive1 -------- drive0 ----------
> > drive1 -DMA enabled: yes no
> > yes no
> > DMA Mode: UDMA 4 NOTSET UDMA 4
> > NOTSET
> > PIO Mode: PIO 4 NOTSET PIO 4
> > NOTSET
> >
> >
> > What is going on? I do have ata100 cables.
> >
> > Thanks,
> >
> > -bharath
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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> >
>

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