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тАО12-14-2006 09:55 PM
тАО12-14-2006 09:55 PM
howto get rid of NO_HW?
I have the server with two FC adapters (HP Tachyon XL2). There has been the SAN switches change.
After the change some FCP Domain devices stayed in NO_HW (I think these items in ioscan output represents the old switches...) Everything is working well, but I would like to get rid of the NO_HW status in ioscan output without reboot.
These items (FCP Domain) have no special files associated, only FC adapter have.
My idea is to use rmsf to remove the special file and HW information for one of the FC adapters with all his children and then recreate the special files and HW info again with inssf. I suppose that the data will flow through the second FC adapter so no data flow interruption will be observed....
I have never done such a sequence before, neither I am sure about this idea, so that is why I am asking for your opinion/experience whether or not it would help.
Best regards
Dusan
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тАО12-14-2006 09:58 PM
тАО12-14-2006 09:58 PM
Re: howto get rid of NO_HW?
insf -e
ioscan -fn
Should help you.
Thanks,
Siva
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тАО12-14-2006 10:06 PM
тАО12-14-2006 10:06 PM
Re: howto get rid of NO_HW?
I doubt that because the insf -e would help because it only reinstalls the special files if some of them were removed and they are there.
But the switches mentioned are NOT there.
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тАО12-14-2006 10:21 PM
тАО12-14-2006 10:21 PM
Re: howto get rid of NO_HW?
2 possibilities:
1) reboot the server
2) perform a "rmsf -k -H" followed by the hw-path of the removed devices
Hope this helps!
Regards
Torsten.
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тАО12-14-2006 10:22 PM
тАО12-14-2006 10:22 PM
Re: howto get rid of NO_HW?
Yes u can remove the device files using rmsf,
first probe for devices
# ioscan -fn|more
note the HW_PATH of items having NO_HW state.
then
# rmsf -H
u can create device files for newly probed
devices.
# insf -e
TO get the rid of NO_HW u have to reboot the system.
-Santosh
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тАО12-14-2006 11:27 PM
тАО12-14-2006 11:27 PM
Re: howto get rid of NO_HW?
as I have already written:
- the FCP Domain interface has NO special file so it CANNOT be removed using -H option
The question is about the idea written above...
DuKul
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тАО12-14-2006 11:58 PM
тАО12-14-2006 11:58 PM
Re: howto get rid of NO_HW?
"rmsf -k -H" does not remove device special files, it removes the definition of the devices attached to the hw patch from the system... so you wouldn't see it in ioscan.
This doesn't remove all devices, but you can try it before you decide to reboot.
-denver
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тАО12-15-2006 12:10 AM
тАО12-15-2006 12:10 AM
Re: howto get rid of NO_HW?
# rmsf -v -k -H 0/4/0/0.7.17.255.0
rmsf: Specified hardware path has no devices
This command would be successful only if the HW would have its special file. So this lead me again to only one possibility how to remove those ugly children - to rmsf its parent = the FC adapter which has the special file:
fc 0 0/4/0/0 td CLAIMED INTERFACE HP Tachyon XL2 Fibre Channel Mass Storage Adapter
/dev/td0
And my question is whether or not would be such an approach safe (because I suppose the data flow will continue using the second FC adapter).....
...or if such an approach would even lead to removing the HW information of its ugly children.
DuKul
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тАО12-15-2006 12:31 AM
тАО12-15-2006 12:31 AM
Re: howto get rid of NO_HW?
If you have LVM configured with PV Links, then it shouldn't be a problem. However, there's no need to do this. If you run rmsf -k -H
You can post your ioscan output as an attachment if you want us to look it over.
-denver
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тАО12-15-2006 12:45 AM
тАО12-15-2006 12:45 AM
Re: howto get rid of NO_HW?
no, it is no need to put an ioscan output.
I would like to remove exactly the items fcp domain and ext_bus, which you are staying that they cannot be removed....and I do not like the reboot....
DuKul