Arch Linux

Caesium

Member

Registered: 2004-02-03

Posts: 21

HD preformance.

I have a small probelem with hd performance i can't seem to figure out, when copying a file from one drive to another the xfer rate drops to ~2.5ish mb/sec.. But, only if i copy something from the drive on the sata controller to the drive on the normal ata controler, if i copy something to the sata drive the xfer rate is ~36ish mb/sec 

the sata drive is the linux drive (/dev/hde /dev/discs/disc1/part2) this is also the boot drive, it's a 80gb maxtor sata150 7200rpm with 8mb cache useing reiser fs. The other drive (/dev/hda /dev/discs/disc0/part1) is a 5400 rpm 20gb maxtor 2mb cache ata 133..  here are the settings from hdparm:

/dev/discs/disc1/disc:
multcount    = 16 (on)
IO_support   =  3 (32-bit w/sync)
unmaskirq    =  1 (on)
using_dma    =  1 (on)
keepsettings =  0 (off)
readonly     =  0 (off)
readahead    = 256 (on)
geometry     = 65535/16/63, sectors = 160086528, start = 0

/dev/discs/disc1/disc:
Timing buffer-cache reads:   1908 MB in  2.00 seconds = 953.19 MB/sec
Timing buffered disk reads:  124 MB in  3.03 seconds =  40.98 MB/sec

/dev/discs/disc0/disc:
multcount    = 16 (on)
IO_support   =  3 (32-bit w/sync)
unmaskirq    =  1 (on)
using_dma    =  1 (on)
keepsettings =  0 (off)
readonly     =  0 (off)
readahead    = 256 (on)
geometry     = 39703/16/63, sectors = 40020624, start = 0

/dev/discs/disc0/disc:
Timing buffer-cache reads:   1924 MB in  2.00 seconds = 960.23 MB/sec
Timing buffered disk reads:  114 MB in  3.05 seconds =  37.36 MB/sec

both are useing udma5, the 20gb xp drive is vfat fs.

any ideas?

Xentac

Forum Fellow

From: Victoria, BC

Registered: 2003-01-17

Posts: 1,797

Website

Re: HD preformance.

Isn't that the difference between read speed and write speed?  Though, I do admit that that's really quite a difference between ata write and sata write.

---

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- Blaise Pascal

Caesium

Member

Registered: 2004-02-03

Posts: 21

Re: HD preformance.

well under windows the ata drive writes at 22mb/sec not sure why i'm getting 1/10th that performance under linux on that drive

edit just to add it's the nforce2 controller for ata and a sil3112act for sata