FC1 Were is my SCSI disk ?
Pete Lancashire
pete5520 at pdxeng.com
Mon Oct 3 04:51:05 UTC 2005
Jeff,
Part II :)
What looks confusing to me is during boot and the initial
device driver loading the Adapter and drive is found,
scsi1, and the one drive attached is assigned the /dev device sda.
but once the boot sequence is done, there is no /dev/sda
or a device reported by /proc/scsi/scsi.
-pete "wait till i attach all 14 devices"
On Sun, 2005-10-02 at 20:18, Jeff Vian wrote:
> On Sun, 2005-10-02 at 19:01 -0700, Pete Lancashire wrote:
> > (will update to FC3 soon)
> >
> > FC1 x86
> >
> > I just added an Adaptec 29160 and for now one old hard drive
> >
> > a snip of dmesg gives me
> >
> > Attached scsi disk sda at scsi1, channel 0, id 0, lun 0
> > SCSI device sda: 17755614 512-byte hdwr sectors (9091 MB)
> > sda: unknown partition table
> >
> > but no matter what I do, where I look cant find my disk
> > like fdisk /dev/sda give unable to open device.
> >
> >
> > /proc/scsi/scsi only has my two pseudo scsi devices in it
> >
> > Attached devices:
> > Host: scsi0 Channel: 00 Id: 00 Lun: 00
> > Vendor: ATAPI Model: CD-RW 52X24X Rev: MB53
> > Type: CD-ROM ANSI SCSI revision: 02
> > Host: scsi0 Channel: 00 Id: 01 Lun: 00
> > Vendor: TOSHIBA Model: CD/DVDW SD-R5372 Rev: TU53
> > Type: CD-ROM ANSI SCSI revision: 02
> >
>
>
> You may want to check/confirm the actual scsi cable is properly
> connected and terminated. Unlike IDE devices, there MUST be exactly 2
> terminators on a scsi bus and the cable must be connected properly.
> Less than 2 termination points, more than 2 termination points, or
> terminators not at the ends of the cable can cause problems.
>
> Connections MUST be made to both ends of the cable *at the end*. Any
> connectors between may or may not be used. Termination is usually done
> by the adapter at one end of the cable, and by either a physical
> terminator or the device connected to the other end of the cable.
>
> If the drive can be jumpered to enable termination on the drive it can
> be connected to the end of the cable. No other termination is allowed at
> this end of the cable when this is used. Termination must also be
> compatible with the bus speed. Your adapter is ultra 160 so the
> termination must be at least that quality.
>
> The last thing that is critical with scsi is addressing. No two devices
> on the same bus can have the same address. I don't think that is your
> issue since by default the adapter is set to ID 7 and the dmesg output
> shows the drive is at ID 0.
>
> > doing echo "scsi add-single-device 1 0 0 0" > /proc/scsi/scsi
> >
> > only adds an entry do /log/messges, does not change /proc/scsi/scsi
> > s output
> >
> >
> >
> > also /proc/scsi seems to be a bit shy of things
> >
> > Am I missing something really simple ?
> >
> > TIA,
> >
> > -PETE
> >
> > in /proc/scsi
> >
> > >find /proc/scsi
> > /proc/scsi
> > /proc/scsi/sg
> > /proc/scsi/sg/version
> > /proc/scsi/sg/host_strs
> > /proc/scsi/sg/host_hdr
> > /proc/scsi/sg/hosts
> > /proc/scsi/sg/device_strs
> > /proc/scsi/sg/device_hdr
> > /proc/scsi/sg/devices
> > /proc/scsi/sg/debug
> > /proc/scsi/sg/def_reserved_size
> > /proc/scsi/sg/allow_dio
> > /proc/scsi/ide-scsi
> > /proc/scsi/ide-scsi/0
> > /proc/scsi/scsi
> >
> >
> >
> > the SCSI part of dmesg ...
> >
> > SCSI subsystem driver Revision: 1.00
> > hdc: attached ide-scsi driver.
> > hdd: attached ide-scsi driver.
> > scsi0 : SCSI host adapter emulation for IDE ATAPI devices
> > Vendor: ATAPI Model: CD-RW 52X24X Rev: MB53
> > Type: CD-ROM ANSI SCSI revision: 02
> > Vendor: TOSHIBA Model: CD/DVDW SD-R5372 Rev: TU53
> > Type: CD-ROM ANSI SCSI revision: 02
> > parport0: PC-style at 0x378 [PCSPP,TRISTATE]
> > parport0: Printer, HEWLETT-PACKARD DESKJET 895C
> > scsi1 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36
> > <Adaptec 29160N Ultra160 SCSI adapter>
> > aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
> >
> > blk: queue f6fbde14, I/O limit 4095Mb (mask 0xffffffff)
> > (scsi1:A:0): 10.000MB/s transfers (10.000MHz, offset 15)
> > Vendor: SEAGATE Model: ST410800N Rev: 0016
> > Type: Direct-Access ANSI SCSI revision: 02
> > blk: queue f6fbdc14, I/O limit 4095Mb (mask 0xffffffff)
> > scsi1:A:0:0: Tagged Queuing enabled. Depth 32
> > Attached scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
> > Attached scsi CD-ROM sr1 at scsi0, channel 0, id 1, lun 0
> > sr0: scsi3-mmc drive: 52x/52x writer cd/rw xa/form2 cdda tray
> > Uniform CD-ROM driver Revision: 3.12
> > sr1: scsi3-mmc drive: 48x/48x writer cd/rw xa/form2 cdda tray
> > sr1: Hmm, seems the drive doesn't support multisession CD's
> > Attached scsi disk sda at scsi1, channel 0, id 0, lun 0
> > SCSI device sda: 17755614 512-byte hdwr sectors (9091 MB)
> > sda: unknown partition table
> > scsi : 1 host left.
> >
> > The key being
> >
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