Slow HD speed

Message

antipop · Post by **antipop** » Mon Jun 30, 2003 6:25 pm

What's wrong here? I'm using 80GB Seagate Barracuda IV. I should be getting ~45 MB/sec instead of 18.

hdparm -i /dev/hda

/dev/hda:

 Model=ST380021A, FwRev=3.19, SerialNo=3HV1EJTM
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
 BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=16
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=156301488
 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 
 UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5 
 AdvancedPM=no WriteCache=enabled
 Drive conforms to: device does not report version: 

 * signifies the current active mode

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hdparm /dev/hda
/dev/hda:
 multcount    = 16 (on)
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  0 (off)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    =  8 (on)
 geometry     = 9729/255/63, sectors = 156301488, start = 0

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hdparm -tT /dev/hda

/dev/hda:
 Timing buffer-cache reads:   1780 MB in  2.00 seconds = 890.00 MB/sec

bash-2.05b# hdparm -tT /dev/hda

/dev/hda:
 Timing buffer-cache reads:   1896 MB in  2.00 seconds = 948.00 MB/sec
 Timing buffered disk reads:   54 MB in  3.00 seconds =  18.00 MB/sec

antipop · Post by **antipop** » Thu Jul 03, 2003 11:02 am

bumpity bump

Still suffering. Can anyone help me?

puggy · Post by **puggy** » Thu Jul 03, 2003 11:13 am

Have you tried bumping it up to udma5 if you can? Currently it seems your only using udma2.

Puggy

antipop · Post by **antipop** » Thu Jul 03, 2003 1:48 pm

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hdparm -X udma5 /dev/hda

/dev/hda:
 setting xfermode to 69 (UltraDMA mode5)

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hdparm -tT /dev/hda

/dev/hda:
 Timing buffer-cache reads:   1924 MB in  2.00 seconds = 962.00 MB/sec
 Timing buffered disk reads:   56 MB in  3.10 seconds =  18.04 MB/sec

Didn't help.
This is odd since I've used to get 40+ MB/sec. That's before reinstall.

GentooBox · Post by **GentooBox** » Thu Jul 03, 2003 2:08 pm

try turn this on:

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IO_support   =  0 (default 16-bit) 
unmaskirq    =  0 (off)

to enable it and some other things:

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hdparm -d1 -A1 -m16 -u1 -a64 -X68 /dev/hda

then it should work.

btw:

why does it test with only 56 mb ?
check if you have enough free disk space by:

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df -m

antipop · Post by **antipop** » Thu Jul 03, 2003 3:01 pm

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 hdparm -d1 -A1 -m16 -u1 -a64 -X68 /dev/hda 

/dev/hda:
 setting fs readahead to 64
 setting multcount to 16
 setting unmaskirq to 1 (on)
 setting using_dma to 1 (on)
 setting xfermode to 68 (UltraDMA mode4)
 setting drive read-lookahead to 1 (on)
 multcount    = 16 (on)
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)
 readahead    = 64 (on)

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hdparm -tT /dev/hda

/dev/hda:
 Timing buffer-cache reads:   1848 MB in  2.00 seconds = 924.00 MB/sec
 Timing buffered disk reads:   54 MB in  3.05 seconds =  17.70 MB/sec

I have over 3 gigabytes of empty space on the drive so that cannot be the problem.

gnoodle · Post by **gnoodle** » Fri Jul 04, 2003 10:07 am

what about your idebus speed setting? could that be it?

antipop · Post by **antipop** » Fri Jul 04, 2003 11:16 am

Ok, the problem is solved now.
The problem was that I had accidentally broken my IDE cable that goes to harddrive. I had swapped it to 100% working IDE cable from my CD-RW but somehow HD speed got crippled.
I don't really understand. Maybe the other IDE cable was DMA33 or something.

Thank you all for your help