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Can't locate module

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Alex Lavrov.
Honored Contributor

Can't locate module

Hello,

I just installed RHAS3-U4 and almost on every command (line network restart, rpm -qa etc ..) I get a message:

modprobe: Can't locate module block-major-135

Any suggestions?

Thanx.
I don't give a damn for a man that can only spell a word one way. (M. Twain)
8 REPLIES
Gopi Sekar
Honored Contributor

Re: Can't locate module


I believe something is missing in your system (obviously:)

check the /etc/modprobe.conf file if there is any entry with 'block-major-135' then comment that line and see whether you are getting that message.

what i gave you is just a hint on how to suppress the message, but you may have to listen to some other expert to find the root cause and correct it.

Hope this helps,
Gopi
Never Never Never Giveup
Vitaly Karasik_1
Honored Contributor

Re: Can't locate module

Alex,

First at all, RHEL3 UPD5 is available.

Do you have something unusual in your modules.conf? dmesg?

Rgds,
Vitaly
Ivan Ferreira
Honored Contributor

Re: Can't locate module

Try adding the following line to modprobe.conf:

alias block-major-135 off

Maybe you need to reboot.
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Matti_Kurkela
Honored Contributor

Re: Can't locate module

block-major-135 refers to SCSI disk devices named /dev/sdig.../dev/sdiv. That means the 240th to 255th SCSI disks installed in the host.

If you don't actually have that many disks, you can definitely add the line
alias block-major-135 off
to /etc/modules.conf.

After making the change, run the "depmod" command. You don't need to boot after that, but booting instead of "depmod" works too.

The "depmod" command is normally run at boot time, but you can run it manually any time you wish.

Most "Can't locate module" messages are a result of a program probing the /dev directory trying to find some hardware. Probing a device file that has no driver attached will trigger an attempt to autoload the necessary module(s). If the messages are annoying, you can silence them by adding a "alias off" line to /etc/modules.conf.
MK
Steven E. Protter
Exalted Contributor

Re: Can't locate module

I suggest reinstallation. There may be a reason why RHAS3 U5 got released.

shalom Alex.

SEP
Steven E Protter
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Alex Lavrov.
Honored Contributor

Re: Can't locate module

Yep, I saw in several places that I can comment the line and it will suppress this message.

I don't have that amount of disks, only 2 mirrored 18GB disks.

Alex.

I don't give a damn for a man that can only spell a word one way. (M. Twain)
Stuart Browne
Honored Contributor
Solution

Re: Can't locate module

By default, Linux assigns various major and minor numbers for various functions. When you do something that accesses different subsystems, it briefly pokes these major and minor numbers to see if they are alive.

All that's happening is when you do given commands, it pokes the SCSI subsystem, which goes and pokes the SCSI device nodes in /dev.

If you're only getting block-major-135, then you'll have:

/dev/sda (sda1-sda15)
/dev/sdb (sdb1-sdb15)
...
/dev/sdif (sdif1-sdif15)

But you'll be missing the '/dev/sdig' through to '/dev/sdiv' grouping (which is block major 135).

Now, you can either create 256 device nodes, or as you don't have that many SCSI devices anyway, just turn the block-major-135 off by modifying '/etc/modprobe.conf'.

Choice is yours.
One long-haired git at your service...
Alex Lavrov.
Honored Contributor

Re: Can't locate module

Thanx Stuart.
I don't give a damn for a man that can only spell a word one way. (M. Twain)