Gigabyte DX586 and Quantum Fireball TM3200

[Davi Antunes Lima]

On Wed, 26 Nov 1997, Manfred Brands wrote:

> Davi Antunes Lima wrote:
> >
> > salsa: /home/davi# hdparm -tT /dev/sda1
> >
> > /dev/sda1:
> >  Timing buffer-cache reads:   32 MB in  1.25 seconds =25.60 MB/sec
> >  Timing buffered disk reads:  16 MB in  5.74 seconds = 2.79 MB/sec
> >
> 
>    My Gigabyte motherboard with dual pentium 166MHz MMX and an onboard
> 7880
> does much better than this.
> 
> The figures below are rough estimates as I don't have the computer here
> at work.
> 
> The original 2.0.30 kernel, did about 8MB/s, I had to specify
> aic7xxx=ultra, to get 20.0MB/s
> bus speed. Tagged queueing was disabled.
> 
> The latest 2.0.32 kernel, with tagged queuing enabled, does 'only'
> 6.7MB/s, still considerably
> more than the figures you quoted.

salsa: /home/davi# hdparm -tT /dev/sda1

/dev/sda1:
 Timing buffer-cache reads:   32 MB in  1.00 seconds =32.00 MB/sec
 Timing buffered disk reads:  16 MB in  5.92 seconds = 2.70 MB/sec

My adapter is only capable to synchronize the scsi bus at 10.0 MHz, I
suppose.

Those figures are with tagged-queue enabled. They still aren't good. My
system is:

- Pentium 166 MHz with 64 Mb RAM;

- Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: QUANTUM  Model: FIREBALL_TM2110S Rev: 300N
  Type:   Direct-Access                    ANSI SCSI revision: 02

- Adapter and driver:
Adaptec AIC7xxx driver version: 4.1/3.2
Compile Options:
  AIC7XXX_RESET_DELAY    : 5
  AIC7XXX_CMDS_PER_LUN   : 8
  AIC7XXX_TAGGED_QUEUEING: Enabled
  AIC7XXX_PAGE_ENABLE    : Enabled
  AIC7XXX_PROC_STATS     : Disabled

Adapter Configuration:
           SCSI Adapter: Adaptec AHA-294X SCSI host adapter
                         (AIC-787x chipset)
               Host Bus: Single
                Base IO: 0xec00
         Base IO Memory: 0xfebff000
                    IRQ: 9
                   SCBs: Used 8, HW 16, Page 255
             Interrupts: 13578
          Serial EEPROM: True
   Extended Translation: Enabled
         SCSI Bus Reset: Enabled
             Ultra SCSI: Disabled
Disconnect Enable Flags: 0xff

- kernel 2.0.32


Hope this explains the difference.

Davi