RE: udev does not create scsi disk entries during bootup

["Surekha.PC" <surekhap@cisco.com>]

Hi,

>> 
>> root disk will show >up as being found by udev for right now, unless 
>> you put udev into initramfs somehow.
>> 
>> Ok, that being the case, the local scsi disks would not be seen by 
>> udev during bootup unless it is part of initrd, right ?

>udev would need to be initrd, and sysfs needs to be mounted.  Have you
done that?

Ok thanks for that, I will try making udev part of initrd and test this
feature.

>> However I am bring up my iSCSI services, after root disk is mounted, 
>> so these disks have to be recognised by udev. Stopping the iSCSI 
>> service, will deconfigure the iSCSI disks, this should remove the
disk 
>> entries in udev. Is it possible to achive this funtionality with the 
>> latest hotplug and udev?

>Yes, make sure that sysfs is mounted before you start finding the iscsi
devices.

I have automounted sysfs. The /sys/block/ shows the iSCSI device
entries.
But hotplug event is not notified by the kernel. This is the reason why
udev
is not getting triggered for configuring device nodes.

I have few queries about the way hotplug mechanism works.

The /etc/hotplug/scsi.agent script does not seem to handle the "ACTION"
add/remove of a scsi device ?
Also the "/usr/src/linux/drivers/scsi" driver code does not have any
hotplug
initialization functions, then how does it indicate "/sbin/hotplug"
program about the addition/deletion of device ?

I have referred the hotplug documentation in the follg URL FYI
http://linux-hotplug.sourceforge.net/?selected=hotplug


Thanks,
surekha



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