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

Sat Jan 2 11:56:09 PST 1999

Hello Jochen,

it works with 40 MHz/s in our PCs. Our logging (dmesg) follows:

scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.4/3.2.4
       <Adaptec AHA-294X Ultra SCSI host adapter>
scsi : 1 host.
  Vendor: IBM       Model: DCAS-34330W       Rev: S65A
  Type:   Direct-Access                      ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
  Vendor: IBM       Model: DGVS09U           Rev: 0080
  Type:   Direct-Access                      ANSI SCSI revision: 03
Detected scsi disk sdb at scsi0, channel 0, id 2, lun 0
  Vendor: NEC       Model: CD-ROM DRIVE:464  Rev: 1.05
  Type:   CD-ROM                             ANSI SCSI revision: 02
Detected scsi CD-ROM sr0 at scsi0, channel 0, id 3, lun 0
  Vendor: IBM       Model: DGVS09U           Rev: 03B0
  Type:   Direct-Access                      ANSI SCSI revision: 03
Detected scsi disk sdc at scsi0, channel 0, id 4, lun 0
scsi : detected 1 SCSI cdrom 3 SCSI disks total.
(scsi0:0:3:0) Synchronous at 4.0 Mbyte/sec, offset 15.
Uniform CDROM driver Revision: 2.50
(scsi0:0:0:0) Synchronous at 40.0 Mbyte/sec, offset 8.
SCSI device sda: hdwr sector= 512 bytes. Sectors= 8467200 [4134 MB] [4.1
GB]
(scsi0:0:2:0) Synchronous at 40.0 Mbyte/sec, offset 8.
SCSI device sdb: hdwr sector= 512 bytes. Sectors= 17829870 [8705 MB] [8.7
GB]
(scsi0:0:4:0) Synchronous at 40.0 Mbyte/sec, offset 8.
SCSI device sdc: hdwr sector= 512 bytes. Sectors= 17829870 [8705 MB] [8.7
GB]

You should check the adaptec setup. And perhaps you should go to a newer
linux version with a newer adaptec-driver. We have linux-2.1.131.

With best regards 
	Juergen

On Sat, 2 Jan 1999, Jochen Roedenbeck wrote:

> 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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