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Re: scsi & linux
Hashibon Adham <phadham@aluf.technion.ac.il> wrote:
> Hi,
>
> We have a system with an Adaptec AHA-2940UW ultra
> wide scsi adapter capable of 16 bits transfer mode (not that it says much
> to me!)
Same as the "W" in the adapter's name.
> but, when i look at the startup messeges of the redhat 5.1 (with
> 2.0.34 kernel) it says "Refusing WIDE negotiation; using 8 bit transfers"
> (below is the full messege from the dmesg output.
>
> Does this mean we are not getting full performance from our system with
> linux, can we do any better!
>
> "scsi" part of dmesg output...
> -----------------------------
>
> aic7xxx: Cables present (Int-50 NO, Int-68 YES, Ext-68 NO)
> (scsi0:0:0:0) Using wide (16 bit) transfers.
> (scsi0:0:0:0) Synchronous at 10.0MHz, offset 8.
> Vendor: SEAGATE Model: ST39173W Rev: 5764
> Type: Direct-Access ANSI SCSI revision: 02
> Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
> (scsi0:0:3:0) Refusing WIDE negotiation; using 8 bit transfers.
> (scsi0:0:3:0) Synchronous at 6.67MHz, offset 15.
> Vendor: ARCHIVE Model: Python 04106-XXX Rev: 7270
> Type: Sequential-Access ANSI SCSI revision: 02
> SCSI device sda: hdwr sector= 512 bytes. Sectors= 17783240 [8683 MB] [8.7
> GB]
The message you mention refers to the tape only, not the disk. I don't
understand, though, why the tape is connected to the wide interface.
Regards,
Evgeny
--
____________________________________________________________
/ Evgeny Stambulchik <fnevgeny@plasma-gate.weizmann.ac.il> \
/ Plasma Laboratory, Weizmann Institute of Science, Israel \ \
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- References:
- scsi & linux
- From: Hashibon Adham <phadham@aluf.technion.ac.il>