Re: Slow harddisk

[Ng Pek Yong]

On Thu, 9 May 2002, DervishD wrote:

>     Hi, Ng :))
> 
> > I/O support  =  3 (32-bit w/sync)
> 
>     Try w/o sync
> 
> > using_dma    =  0 (off)
> 
>     Enable dma
> 
>     This should increase the speed to normal levels.
> 
>     Raśl
> 

It got worse ;)

(note: I can;t get dma to work; see below)

# hdparm -X69 -d1 -u1 -c1 -m16 /dev/hde

/dev/hde:
 setting 32-bit I/O support flag to 1
 setting multcount to 16
 setting unmaskirq to 1 (on)
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 setting xfermode to 69 (UltraDMA mode5)
 multcount    = 16 (on)
 I/O support  =  1 (32-bit)
 unmaskirq    =  1 (on)
 using_dma    =  0 (off)
[root@lal root]# hdparm  -Tt /dev/hde

/dev/hde:
 Timing buffer-cache reads:   128 MB in  2.12 seconds = 60.38 MB/sec
 Timing buffered disk reads:  64 MB in 24.37 seconds =  2.63 MB/sec