SCSI speed with IBM DGVS09U (8 GB) hard drive, Linux

[Jochen Roedenbeck]

I use a DGVS09U hard disc drive (8.7 GB) with 68-pin connector at an
Adaptec 2940 UW controller. As shown below the driver always reports 
only 10.0 MHz for the drive. It is the same speed like for the other
hard disc (Quantum) with 50-pin connector.

The drive with 68-pin connector should work at 20 MHz, shouldn't it?

Can someone help me?

Contents of /var/log/boot.msg:

[...]
<6>aic7xxx: BurstLen = 8 DWDs, Latency Timer = 32 PCLKS
<6>aic7xxx: AHA-2940 Ultra Rev C.
<6>aic7xxx: devconfig = 0x1580.
<6>aic7xxx: Reading SEEPROM...done.
<6>aic7xxx: Extended translation enabled.
<6>aic7xxx: Memory check yields 16 SCBs, paging not enabled.
<4>aic7xxx: Enabling wide channel of AHA-2940 Ultra-Wide.
<4>AHA-2940 Ultra-WIDE (PCI-bus), I/O 0xe400, Mem 0xfbfe0000:
<4>    irq 12
<4>    bus release time 40 bclks
<4>    data fifo threshold 100%
<4>    SCSI CHANNEL A:
<4>        scsi id 7
<4>        scsi selection timeout 256 ms
<4>        scsi bus reset at power-on enabled
<4>        scsi bus parity enabled
<4>        scsi bus termination (low byte) enabled
<4>        scsi bus termination (high byte) enabled
<6>aic7xxx: Downloading sequencer code...done.
<4>aic7xxx: Resetting the SCSI bus...done.
<4>scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI)
3.4/3.2/3.1
<4>scsi : 1 host.
<6>scsi0: Scanning channel A for devices.
<4>scsi0: Target 0, channel A, refusing WIDE negotiation; using 8 bit
transfers
<4>scsi0: Target 0, channel A, now synchronous at 10.0MHz, offset 15.
<4>  Vendor: Quantum   Model: VP32170           Rev: 89TC
<4>  Type:   Direct-Access                      ANSI SCSI revision: 02
<4>Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
<6>scsi0: Received MSG_WDTR, Target 1, channel A needwdtr(0xfffe).
<4>scsi0: Target 1, channel A, now synchronous at 10.0MHz, offset 15.
<4>aic7xxx: Sending SDTR!!
<4>  Vendor: IBM       Model: DGVS09U           Rev: 03B0
<4>  Type:   Direct-Access                      ANSI SCSI revision: 03
<4>Detected scsi disk sdb at scsi0, channel 0, id 1, lun 0
<4>scsi0: Target 2, channel A, refusing WIDE negotiation; using 8 bit
transfers
<4>scsi0: Target 2, channel A, now synchronous at 5.0MHz, offset 15.
<4>  Vendor: SONY      Model: CD-ROM CDU-76S    Rev: 1.1c
<4>  Type:   CD-ROM                             ANSI SCSI revision: 02
<4>Detected scsi CD-ROM sr0 at scsi0, channel 0, id 2, lun 0
<6>scsi0: Received MSG_WDTR, Target 3, channel A needwdtr(0xfff8).
<4>scsi0: Target 3, channel A, now synchronous at 5.0MHz, offset 8.
<4>  Vendor: HP        Model: HP35470A          Rev: 1109
<4>  Type:   Sequential-Access                  ANSI SCSI revision: 02
<6>Detected scsi tape st0 at scsi0, channel 0, id 3, lun 0
<4>scsi : detected 1 SCSI tape 1 SCSI cdrom 2 SCSI disks total.
<4>SCSI device sda: hdwr sector= 512 bytes. Sectors= 4238640 [2069 MB]
[2.1 GB]
<4>SCSI device sdb: hdwr sector= 512 bytes. Sectors= 17829870 [8705 MB]
[8.7 GB
[...]

Contents of /proc/scsi/aix7xxx/0:

Adaptec AIC7xxx driver version: 3.4/3.2/3.1

Compile Options:
  AIC7XXX_RESET_DELAY    : 15
  AIC7XXX_TWIN_SUPPORT   : Enabled
  AIC7XXX_TAGGED_QUEUEING: Disabled
  AIC7XXX_PAGE_ENABLE    : Disabled
  AIC7XXX_PROC_STATS     : Disabled

Adapter Configuration:
          SCSI Adapter: AHA-2940 Ultra
                        (AIC-788x chipset)
              Host Bus: Wide
               Base IO: 0xe400
                   IRQ: 12
                  SCBs: Used 2, HW 16, Page 16
            Interrupts: 10425
         Serial EEPROM: True
  Extended Translation: Enabled
        SCSI Bus Reset: Enabled
            Ultra SCSI: Disabled
     Target Disconnect: Enabled

Jochen Roedenbeck


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