Re: Possible faulty drive

From: Richard Brodie (R.Brodie_at_rl.ac.uk)
Date: 03/31/05 

Date: Thu, 31 Mar 2005 10:07:38 +0100

"Jeff Cameron" <roktsci@comcast.net> wrote in message news:BE70BAB7.A861%roktsci@comcast.net...

> > Port Status x0000032C DEVCMDERR - device command error
> > SCSI Command Opcode x12 Inquiry
> > Command Data
> > x00
> > x00
> > x00
> > xFF
> > x00

> This section of the SCSI command indicates that the driver is requesting
> what I believe to be device geometry information.

Actually, it's just asking for basic device information. Essentially the same stuff
as SHOW DEVICE shows: device type, manufacturer id etc. It must have
worked (once) to load the disk driver at all though.

> I'm also confused as to why the command is 5 bytes instead of 4. Most narrow
> SCSI commands are two 16 bit words.

6 bytes is the smallest command size, which this is (including the 0x12).

I would start looking at the simple things: cabling, termination, bus length
(and width). There doesn't appear to be a clean data path.

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