[rhelv6-list] kickstarting rhel6 from usb key

[Jason Keltz]

Hi Greg,

I believe /dev/disk/by-label is available, and I looked into using that, 
but still, if the usb key becomes /dev/sda, then this will effect 
installation of bootloader, etc.  hard to work around.
Does red hat not support installation via usb key?
I'm not using multipath so I don't have /dev/disk/by-scsi-id..
In this particular case, the system has a 3ware 9750-8e card (which is 
referred to first in bios)..

I wish there was some way to force the usb device as being sdb.

jas.

Greg Swift wrote:
> in the stage2 environment check to see if /dev/disk/by-label is
> available.  If it is, and you know or can change the label of your usb
> device, you should be able to reference this.
> 
> I know that in the multipath bits they are trying to push more heavily
> into using the /dev/disk/by-scsi-id/ for disk handling in rhel 6
> anaconda.
> 
> -greg
> 
> 
> On Wed, Jun 15, 2011 at 15:18, Jason Keltz <jas at cse.yorku.ca> wrote:
>> Hi Ges,
>>
>> Thanks for your reply.
>> Does this mean that kickstarting from a USB key is just not reliable?
>> You have to be able to specify a device during kickstart, and if you don't
>> know what the device that represents the hard disk will be, then what do
>> you?
>> I could "calculate" it on the fly, and modify the kickstart process
>> accordingly, but if there are multiple disks in the system, and I want to be
>> able to specify which of those devices will be used for kickstart, then this
>> messes things up ..
>> Once a system is kickstarted, you can use labels, etc. to identify disks,
>> but assuming you're starting with a totally blank hard disk, who knows what
>> device the kernel will see..
>>
>> I remember this was an issue years and years ago .. can't believe we haven't
>> found a better way to handle this under Linux yet...
>>
>> sigh..
>>
>> Jason.
>>
>>
>> Grzegorz Witkowski wrote:
>>> Hi,
>>>
>>> /dev/... devices may not be persistent between reboots.
>>> It is not a bug. The kernel usually just assigns unpredictable device
>>> names based on the order of discovery. See udev related info.
>>>
>>> Regards,
>>> Ges
>>>
>>> On Wed, 2011-06-15 at 15:44 -0400, Jason Keltz wrote:
>>>> Hi.
>>>>
>>>> I'm kickstarting a new Red Hat 6.0 system from a USB key.
>>>> I've kickstarted it many times from the key in the last week, and the USB
>>>> key is recognized as sdb, and the system hard disk as sda.
>>>> However, this morning, I went to kickstart, and the USB key was suddenly
>>>> being recognized as sda which, of course messed up the process.
>>>> I tried it various times, and it continued to be that way.
>>>> I then had to leave it for a while because I was busy with other stuff.
>>>> When I came back, the hard disk is now being recognized as sda, usb key
>>>> as sdb.
>>>> What's up?  seems like an odd bug...
>>>>
>>>> Jason.
>>>>
>>>> _______________________________________________
>>>> rhelv6-list mailing list
>>>> rhelv6-list at redhat.com
>>>> https://www.redhat.com/mailman/listinfo/rhelv6-list
>>>
>>>
>>>
>>> _______________________________________________
>>> rhelv6-list mailing list
>>> rhelv6-list at redhat.com
>>> https://www.redhat.com/mailman/listinfo/rhelv6-list
>> _______________________________________________
>> rhelv6-list mailing list
>> rhelv6-list at redhat.com
>> https://www.redhat.com/mailman/listinfo/rhelv6-list
>>
> 
> _______________________________________________
> rhelv6-list mailing list
> rhelv6-list at redhat.com
> https://www.redhat.com/mailman/listinfo/rhelv6-list