Issues with SCSI modules.

Issues with SCSI modules.

[Krishna Prasad G.]

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Hi,

 

This is regarding SCSI kernel modules (scsi_mod, sd_mod - disk modules).

 

System Configuration:

------------------------------

 

Kernel: 2.6.14.3 ppc GNU/Linux

OS: Debian GNU/Linux 3.1

UDEV version: 056

 

On inserting USB Mass Storage Device following messages are generated
(/var/log/messages):

 

Dec 16 16:24:04 kernel: [ 2480.307174] scsi0 : SCSI emulation for USB
Mass Storage devices

Dec 16 16:24:09 kernel: [ 2485.324002]   Vendor: sz.zeyan  Model: USB
Flash Drive   Rev: %%z!Y

Dec 16 16:24:09 kernel: [ 2485.334402]   Type:   Direct-Access
ANSI SCSI revision: 02

Dec 16 16:24:09 kernel: [ 2485.365767] SCSI device sda: 257280 512-byte
hdwr sectors (132 MB)

Dec 16 16:24:09 kernel: [ 2485.376937] sda: Write Protect is off

Dec 16 16:24:09 kernel: [ 2485.411969] SCSI device sda: 257280 512-byte
hdwr sectors (132 MB)

Dec 16 16:24:09 kernel: [ 2485.422894] sda: Write Protect is off

Dec 16 16:24:09 kernel: [ 2485.431777]  sda: sda1

Dec 16 16:24:09 kernel: [ 2485.445774] Attached scsi removable disk sda
at scsi0, channel 0, id 0, lun 0

Dec 16 16:24:10 scsi.agent[3897]:      sd_mod: can't be loaded (for
disk)

 

I am not able to get "add" event from /etc/udev/rules.d/udev.rules!!

 

Please take a look at last line. I think without having this module
(sd_mod.ko) SCSI disk support is not possible.

 

Following are the modules available under the following directory:

 

/lib/modules/2.6.14.3/kernel/drivers/scsi# ls -la

total 392

drwxr-xr-x   2 root root  4096 Apr  7  2006 .

drwxr-xr-x  18 root root  4096 Apr  7  2006 ..

-rw-r--r--   1 root root 23139 Apr  7  2006 ch.ko

-rw-r--r--   1 root root 22714 Apr  7  2006 ide-scsi.ko

-rw-r--r--   1 root root 64352 Apr  7  2006 osst.ko

-rw-r--r--   1 root root 38356 Apr  7  2006 scsi_debug.ko

-rw-r--r--   1 root root 38437 Apr  7  2006 scsi_transport_fc.ko

-rw-r--r--   1 root root 16441 Apr  7  2006 scsi_transport_iscsi.ko

-rw-r--r--   1 root root 29406 Apr  7  2006 scsi_transport_spi.ko

-rw-r--r--   1 root root 51109 Apr  7  2006 sg.ko

-rw-r--r--   1 root root 22210 Apr  7  2006 sr_mod.ko

-rw-r--r--   1 root root 49844 Apr  7  2006 st.ko

 

"scsi_mod.ko" and "sd_mod.ko" are not available. 

 

Hotplug is installed and working.

 

I had gone through this link: http://linuxgazette.net/133/tag.html  ----
section "Modules" for more information.

 

Please help in this regard.

 

Regards,

 

KP

Application Layer, TTEC

Toshiba Embedded Software (India) Pvt Ltd

 


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Re: Issues with SCSI modules.

[Greg KH]

On Fri, Mar 30, 2007 at 05:55:15PM +0530, Krishna Prasad G. wrote:
> Hi,
> 
>  
> 
> This is regarding SCSI kernel modules (scsi_mod, sd_mod - disk modules).
> 
>  
> 
> System Configuration:
> 
> ------------------------------
> 
>  
> 
> Kernel: 2.6.14.3 ppc GNU/Linux
> 
> OS: Debian GNU/Linux 3.1
> 
> UDEV version: 056
> 
>  
> 
> On inserting USB Mass Storage Device following messages are generated
> (/var/log/messages):
> 
>  
> 
> Dec 16 16:24:04 kernel: [ 2480.307174] scsi0 : SCSI emulation for USB
> Mass Storage devices
> 
> Dec 16 16:24:09 kernel: [ 2485.324002]   Vendor: sz.zeyan  Model: USB
> Flash Drive   Rev: %%z!Y
> 
> Dec 16 16:24:09 kernel: [ 2485.334402]   Type:   Direct-Access
> ANSI SCSI revision: 02
> 
> Dec 16 16:24:09 kernel: [ 2485.365767] SCSI device sda: 257280 512-byte
> hdwr sectors (132 MB)
> 
> Dec 16 16:24:09 kernel: [ 2485.376937] sda: Write Protect is off
> 
> Dec 16 16:24:09 kernel: [ 2485.411969] SCSI device sda: 257280 512-byte
> hdwr sectors (132 MB)
> 
> Dec 16 16:24:09 kernel: [ 2485.422894] sda: Write Protect is off
> 
> Dec 16 16:24:09 kernel: [ 2485.431777]  sda: sda1
> 
> Dec 16 16:24:09 kernel: [ 2485.445774] Attached scsi removable disk sda
> at scsi0, channel 0, id 0, lun 0
> 
> Dec 16 16:24:10 scsi.agent[3897]:      sd_mod: can't be loaded (for
> disk)
> 
>  
> 
> I am not able to get "add" event from /etc/udev/rules.d/udev.rules!!

Why not?  Have you run udevmonitor to see if you are?

> Please take a look at last line. I think without having this module
> (sd_mod.ko) SCSI disk support is not possible.

Then build that module :)

But odds are, you have build scsi disk support into your kernel, which
based on the log file, looks to be true.

So I don't see the problem here, your disk is being discovered just
fine.  What is wrong?

thanks,

greg k-h

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RE: Issues with SCSI modules.

[Krishna Prasad G.]

Hi Greg,

Thanks for your quick reply.

I don't have "udevmonitor" binary for Debian, I need to download.

Regards,
 
KP
Application Layer, TTEC
Toshiba Embedded Software (India) Pvt Ltd
 

-----Original Message-----
From: Greg KH [mailto:greg@kroah.com] 
Sent: Friday, March 30, 2007 7:56 PM
To: Krishna Prasad G.
Cc: linux-hotplug-devel@lists.sourceforge.net; gregkh@us.ibm.com
Subject: Re: Issues with SCSI modules.

On Fri, Mar 30, 2007 at 05:55:15PM +0530, Krishna Prasad G. wrote:
> Hi,
> 
>  
> 
> This is regarding SCSI kernel modules (scsi_mod, sd_mod - disk
modules).
> 
>  
> 
> System Configuration:
> 
> ------------------------------
> 
>  
> 
> Kernel: 2.6.14.3 ppc GNU/Linux
> 
> OS: Debian GNU/Linux 3.1
> 
> UDEV version: 056
> 
>  
> 
> On inserting USB Mass Storage Device following messages are generated
> (/var/log/messages):
> 
>  
> 
> Dec 16 16:24:04 kernel: [ 2480.307174] scsi0 : SCSI emulation for USB
> Mass Storage devices
> 
> Dec 16 16:24:09 kernel: [ 2485.324002]   Vendor: sz.zeyan  Model: USB
> Flash Drive   Rev: %%z!Y
> 
> Dec 16 16:24:09 kernel: [ 2485.334402]   Type:   Direct-Access
> ANSI SCSI revision: 02
> 
> Dec 16 16:24:09 kernel: [ 2485.365767] SCSI device sda: 257280
512-byte
> hdwr sectors (132 MB)
> 
> Dec 16 16:24:09 kernel: [ 2485.376937] sda: Write Protect is off
> 
> Dec 16 16:24:09 kernel: [ 2485.411969] SCSI device sda: 257280
512-byte
> hdwr sectors (132 MB)
> 
> Dec 16 16:24:09 kernel: [ 2485.422894] sda: Write Protect is off
> 
> Dec 16 16:24:09 kernel: [ 2485.431777]  sda: sda1
> 
> Dec 16 16:24:09 kernel: [ 2485.445774] Attached scsi removable disk
sda
> at scsi0, channel 0, id 0, lun 0
> 
> Dec 16 16:24:10 scsi.agent[3897]:      sd_mod: can't be loaded (for
> disk)
> 
>  
> 
> I am not able to get "add" event from /etc/udev/rules.d/udev.rules!!

Why not?  Have you run udevmonitor to see if you are?

> Please take a look at last line. I think without having this module
> (sd_mod.ko) SCSI disk support is not possible.

Then build that module :)

But odds are, you have build scsi disk support into your kernel, which
based on the log file, looks to be true.

So I don't see the problem here, your disk is being discovered just
fine.  What is wrong?

thanks,

greg k-h

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