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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?


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Old 11-01-2005, 08:32 AM   #1
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Registered: Oct 2005
Location: China
Distribution: SuSE 10.0
Posts: 15

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NF7-S + Sata .... extremely slow speed...

My harddisk is Seagate 7200rpm,80G Sata.
Cpu: amd 3200+
1G ram ddr400
Motherboard: NF7-S

RLee:/home/lee # hdparm -t /dev/sda

Timing buffered disk reads: 42 MB in 3.04 seconds = 13.81 MB/sec

Too slow. Copy small(<400MB) files is ok, if bigger , the speed will slow down. Copy 2.4G files from partition to partition , in windows xp cost 140 seconds,but in SuSE(Mandriva 2006 also) 10.0 it cost 270 seconds.
If the file is more bigger , more time will cost. When I copy files from windows partition to suse partition , 7.4G files , cost me more than 20 minutes. And when copying , sometimes computer won't response me, like right click on desktop , no menu ,looks like computer is dead, after 5~10 seconds , the menu comes out......just like playing DVD in DVD-ROM without DMA.

RLee:/home/lee # hdparm -d1 /dev/sda

setting using_dma to 1 (on)
HDIO_SET_DMA failed: Inappropriate ioctl for device
HDIO_GET_DMA failed: Inappropriate ioctl for device

RLee:/home/lee # hdparm -i /dev/sda

HDIO_GET_IDENTITY failed: Inappropriate ioctl for device

How can I solve this problem?
Regards from China.
Old 11-02-2005, 12:57 AM   #2
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Registered: Jan 2002
Posts: 6,042

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Seagate SATA hard drives are poor in Linux because of the Silicon Image controller. Also other controllers like the Promise controllers have the same problem. I suggest Hitachi's T7K250 if you want a much faster hard drive. Seagate drives are poor performers for OS drives.

If you still want to use the Seagate SATA hard drive, search this forum on a special way how to enable DMA.


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