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scsi & linux
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!) 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: Warning - detected auto-termination on controller:
aic7xxx: <Adaptec AHA-294X Ultra SCSI host adapter> at PCI 11/0
aic7xxx: Please verify driver detected settings are correct.
aic7xxx: If not, then please properly set the device termination
aic7xxx: in the Adaptec SCSI BIOS by hitting CTRL-A when prompted
aic7xxx: during machine bootup.
aic7xxx: Cables present (Int-50 NO, Int-68 YES, Ext-68 NO)
aic7xxx: Termination (Low ON, High ON)
(scsi0) <Adaptec AHA-294X Ultra SCSI host adapter> found at PCI 11/0
(scsi0) Wide Channel, SCSI ID=7, 16/255 SCBs
(scsi0) BIOS enabled, IO Port 0xb800, IRQ 11
(scsi0) IO Memory at 0xe1000000, MMAP Memory at 0x20819000
(scsi0) Resetting channel
(scsi0) Downloading sequencer code... 406 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.0.13/3.2.4
<Adaptec AHA-294X Ultra SCSI host adapter>
scsi : 1 host.
(scsi0:0:-1:-1) Scanning channel for devices.
(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]
sda: sda1 sda2 < sda5 sda6 >
Toda!
Adham
---------------------
Adham Hashibon -- Computational Physics Group
The Physics Department,
Technion - Israel Institute of Technology
Haifa 32000, Israel
Tel:972-4829-2043, Fax:972-4822-1514
****** Live long and prosper ******
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