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Date:      Thu, 8 Mar 2001 16:57:07 -0600 (CST)
From:      DEANDRADE FABIO <fandrade@falcon.cc.ukans.edu>
To:        aic7xxx@freebsd.org
Subject:   Device seemingly running at incorrect transfer rate...
Message-ID:  <Pine.OSF.4.10.10103081646060.22312-100000@falcon.cc.ukans.edu>
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I am curious if there is anyone that could help clarify to me why my 39160
Ultra 160 card seems to demonstrate a transfer rate of 160 MB/s during the
boot up procedure under the adaptec bios utility and yet under Linux it
shows up as 80.0 MB/s while I am using an Quantum Atlas 10K II Ultra 160
drive?

I am running only this drive on channel A of the controller and I have
tried the system with kernels 2.2.16, 2.2.18 and currently I am running
kernel 2.4.2.

The system runs pretty smoothly, but I am puzzled.

Here is a  copy of the /proc/aic7xxx/0 file:

Adaptec AIC7xxx driver version: 5.2.1/5.2.0 Compile Options:
  TCQ Enabled By Default : Disabled
  AIC7XXX_PROC_STATS : Enabled
 
Adapter Configuration:
           SCSI Adapter: Adaptec AIC-7899 Ultra 160/m SCSI host adapter
                           Ultra-160/m LVD/SE Wide Controller Channel A at
PCI 3/4/0
    PCI MMAPed I/O Base: 0xd1000000
 Adapter SEEPROM Config: SEEPROM found and used.
      Adaptec SCSI BIOS: Enabled
                    IRQ: 15
                   SCBs: Active 0, Max Active 1,
                         Allocated 31, HW 32, Page 255
             Interrupts: 175581
      BIOS Control Word: 0xb8f5
   Adapter Control Word: 0x5c5c
   Extended Translation: Enabled
Disconnect Enable Flags: 0xffff
     Ultra Enable Flags: 0x0000
 Tag Queue Enable Flags: 0x0000 
Ordered Queue Tag Flags: 0x0000 Default
        Tag Queue Depth: 8
    Tagged Queue By Device array for aic7xxx host instance 0:
      {255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255}
    Actual queue depth per device for aic7xxx host instance 0:
      {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
 
Statistics:
 
(scsi0:0:0:0)
  Device using Wide/Sync transfers at 80.0 MByte/sec, offset 127
  Transinfo settings: current(10/127/1/0), goal(10/127/1/0),
user(9/127/1/2)
  Total transfers 175482 (80620 reads and 94862 writes)
             < 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+
   Reads:  16 0 64660 2023 1979 4791 1394 5757
  Writes:  0 0 73467 14886 1670 827 395 3617
                                                   
Also I am running the latest bios update from Adaptec for this card
version 2.52.2

Thanks,
Fabio


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