Re: Geom Multipath
In the last episode (Sep 12), Outback Dingo said: does geom_multipath have some automatic type detection of mutipath drives? like in solaris? or is it all a manual process of labelling and such ?? It's all manual. Your two options are either gmultipath create, which will build a temporary device that will be forgotten on reboot, or gmultipath label, which writes a metadata block to the end of your disk. -- Dan Nelson dnel...@allantgroup.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Geom Multipath
does geom_multipath have some automatic type detection of mutipath drives? like in solaris? or is it all a manual process of labelling and such ?? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Geom multipath
Thanks!. I did know that there would be only one active path, but path switching doesnt seem to happen when one path fails. The behaviour is intermittent, so i was wondering if there are any kernel tunables that i could play with, like timeout variables etc. From: John Nielsen [EMAIL PROTECTED] To: freebsd-questions@freebsd.org Cc: Ganesh kamath [EMAIL PROTECTED] Sent: Thursday, November 6, 2008 8:36:13 PM Subject: Re: Geom multipath On Thursday 06 November 2008 07:13:36 am Ganesh kamath wrote: I am trying to get multipath running in freebsd version 7. Are there any configuration files that i can tweak with geom multipath?. The paths are active/passive to the storage array and i dont seem to have control of what path the IO takes, so i was wondering if there are any tweaks thati could do to control the flow of IO to a specific path. Read the manpage. Thoroughly. gmultipath(8). :) There is only one active path to any device, and it is the first in the list of devices. You specify the device list when you create the provider and it is updated if errors occur and when gmultipath labeled devices reappear. I would guess/hope that the order would be preserved across a reboot but I'm not sure. That type of question might be suitable for the freebsd-geom@ mailing list. Also, the IO doesnt resume when i try to do some cable pulls and plug them back. If you're not using an mpt or isp disk controller then you have to initiate a rescan manually for the device to reappear. See camcontrol and/or atacontrol. When the device _does_ reappear it will be inserted at the end of the list, so I/O will continue across the alternate path which is still first in the list. JN ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Geom multipath
Hi, I am trying to get multipath running in freebsd version 7. Are there any configuration files that i can tweak with geom multipath?. The paths are active/passive to the storage array and i dont seem to have control of what path the IO takes, so i was wondering if there are any tweaks thati could do to control the flow of IO to a specific path. Also, the IO doesnt resume when i try to do some cable pulls and plug them back. thanks! Gak ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Geom multipath
On Thursday 06 November 2008 07:13:36 am Ganesh kamath wrote: I am trying to get multipath running in freebsd version 7. Are there any configuration files that i can tweak with geom multipath?. The paths are active/passive to the storage array and i dont seem to have control of what path the IO takes, so i was wondering if there are any tweaks thati could do to control the flow of IO to a specific path. Read the manpage. Thoroughly. gmultipath(8). :) There is only one active path to any device, and it is the first in the list of devices. You specify the device list when you create the provider and it is updated if errors occur and when gmultipath labeled devices reappear. I would guess/hope that the order would be preserved across a reboot but I'm not sure. That type of question might be suitable for the freebsd-geom@ mailing list. Also, the IO doesnt resume when i try to do some cable pulls and plug them back. If you're not using an mpt or isp disk controller then you have to initiate a rescan manually for the device to reappear. See camcontrol and/or atacontrol. When the device _does_ reappear it will be inserted at the end of the list, so I/O will continue across the alternate path which is still first in the list. JN ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
